diff --git a/.eslintplugin.js b/.eslintplugin.js
index d199cbdd58a3..c656964a40e3 100644
--- a/.eslintplugin.js
+++ b/.eslintplugin.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /* global require, module */
 
 const {rules} = require('./build-system/eslint-rules');
diff --git a/.eslintrc.js b/.eslintrc.js
index f2d97d1395ef..4cc763193ee4 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const fs = require('fs');
 
 const {
diff --git a/3p/.eslintrc.js b/3p/.eslintrc.js
index 049751a98030..8f6e2124469c 100644
--- a/3p/.eslintrc.js
+++ b/3p/.eslintrc.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 module.exports = {
   'rules': {
     'local/no-style-display': 0,
diff --git a/3p/3d-gltf/animation-loop.js b/3p/3d-gltf/animation-loop.js
index 23ee0152a079..2e0d4ce701bc 100644
--- a/3p/3d-gltf/animation-loop.js
+++ b/3p/3d-gltf/animation-loop.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 export default class AnimationLoop {
   /**
    * Creates an instance of AnimationLoop.
diff --git a/3p/3d-gltf/index.js b/3p/3d-gltf/index.js
index b61abb09fbcb..58d830013bb0 100644
--- a/3p/3d-gltf/index.js
+++ b/3p/3d-gltf/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /* eslint-disable import/no-deprecated */
 
 import {loadScript} from '#3p/3p';
diff --git a/3p/3d-gltf/viewer.js b/3p/3d-gltf/viewer.js
index 804c7111d20b..39a5555d92ed 100644
--- a/3p/3d-gltf/viewer.js
+++ b/3p/3d-gltf/viewer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /* global THREE */
 
 import {setStyle} from '#core/dom/style';
diff --git a/3p/3p.js b/3p/3p.js
index 8d805e44845c..30098c7ac538 100644
--- a/3p/3p.js
+++ b/3p/3p.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Utility functions for scripts running inside of a third
  * party iframe.
diff --git a/3p/amp-script-proxy-iframe.js b/3p/amp-script-proxy-iframe.js
index 0bf32fead838..07fc2e72fa88 100644
--- a/3p/amp-script-proxy-iframe.js
+++ b/3p/amp-script-proxy-iframe.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * See IframeWorker within `worker-dom` for the iframe proxy contract.
  */
diff --git a/3p/ampcontext-integration.js b/3p/ampcontext-integration.js
index 6553584c7bf4..325a6fcd725c 100644
--- a/3p/ampcontext-integration.js
+++ b/3p/ampcontext-integration.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {dict} from '#core/types/object';
 
 import {computeInMasterFrame} from './3p';
diff --git a/3p/ampcontext-lib.js b/3p/ampcontext-lib.js
index 7bab53938c03..5557e3d8829f 100644
--- a/3p/ampcontext-lib.js
+++ b/3p/ampcontext-lib.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import './polyfills';
 
diff --git a/3p/ampcontext.js b/3p/ampcontext.js
index bdb80ab6cd77..7e1493600750 100644
--- a/3p/ampcontext.js
+++ b/3p/ampcontext.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {MessageType} from '#core/3p-frame-messaging';
 import {AmpEvents} from '#core/constants/amp-events';
 import {Deferred} from '#core/data-structures/promise';
diff --git a/3p/bodymovinanimation.js b/3p/bodymovinanimation.js
index ccb11dd99583..a7900ea3c7cc 100644
--- a/3p/bodymovinanimation.js
+++ b/3p/bodymovinanimation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {setStyles} from '#core/dom/style';
 import {dict} from '#core/types/object';
 import {parseJson} from '#core/types/object/json';
diff --git a/3p/embedly.js b/3p/embedly.js
index 0730574c6f40..69a104134dca 100644
--- a/3p/embedly.js
+++ b/3p/embedly.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {setStyle} from '#core/dom/style';
 import {hasOwn} from '#core/types/object';
 
diff --git a/3p/environment.js b/3p/environment.js
index d8b8028e14f3..63be7559461c 100644
--- a/3p/environment.js
+++ b/3p/environment.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /* eslint-disable import/no-deprecated */
 
 import {listenParent} from './messaging';
diff --git a/3p/facebook.js b/3p/facebook.js
index 1a571b39569a..519395bd556f 100644
--- a/3p/facebook.js
+++ b/3p/facebook.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {setStyle} from '#core/dom/style';
 import {isEnumValue} from '#core/types/enum';
 import {dict} from '#core/types/object';
diff --git a/3p/frame-metadata.js b/3p/frame-metadata.js
index 1b5d41c36cd8..c678afcd63b4 100644
--- a/3p/frame-metadata.js
+++ b/3p/frame-metadata.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {once} from '#core/types/function';
 import {dict} from '#core/types/object';
 import {parseJson} from '#core/types/object/json';
diff --git a/3p/github.js b/3p/github.js
index 7a5b09a72635..155b9fce25de 100644
--- a/3p/github.js
+++ b/3p/github.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {writeScript} from './3p';
 
 import {userAssert} from '../src/log';
diff --git a/3p/iframe-messaging-client.js b/3p/iframe-messaging-client.js
index a1f5b713ceb6..52e8c2510813 100644
--- a/3p/iframe-messaging-client.js
+++ b/3p/iframe-messaging-client.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {
   CONSTANTS,
   deserializeMessage,
diff --git a/3p/iframe-transport-client-lib.js b/3p/iframe-transport-client-lib.js
index ba8c59ca986a..068111f5f967 100644
--- a/3p/iframe-transport-client-lib.js
+++ b/3p/iframe-transport-client-lib.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import './polyfills';
 
diff --git a/3p/iframe-transport-client.js b/3p/iframe-transport-client.js
index fa55f3d3302e..2ea317eb8354 100644
--- a/3p/iframe-transport-client.js
+++ b/3p/iframe-transport-client.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {IframeTransportEventDef, MessageType} from '#core/3p-frame-messaging';
 import {tryParseJson} from '#core/types/object/json';
 
diff --git a/3p/integration-lib.js b/3p/integration-lib.js
index 984a1d29233c..8252f4460ea6 100644
--- a/3p/integration-lib.js
+++ b/3p/integration-lib.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as mode from '#core/mode';
 import {dict} from '#core/types/object';
 import {parseJson} from '#core/types/object/json';
diff --git a/3p/integration.js b/3p/integration.js
index aa53f68dd2e9..79f7226e9c6c 100644
--- a/3p/integration.js
+++ b/3p/integration.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Registers all known ad network factories and then executes
  * one of them.
diff --git a/3p/mathml.js b/3p/mathml.js
index 7729b0d59ba0..dd4bb6088290 100644
--- a/3p/mathml.js
+++ b/3p/mathml.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {setStyle} from '#core/dom/style';
 
 import {writeScript} from './3p';
diff --git a/3p/messaging.js b/3p/messaging.js
index 3c14835e142b..b3d7b14a70dd 100644
--- a/3p/messaging.js
+++ b/3p/messaging.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseJson} from '#core/types/object/json';
 
 import {getData} from '../src/event-helper';
diff --git a/3p/polyfills.js b/3p/polyfills.js
index 2ddff9ce7426..3773dc3ac75f 100644
--- a/3p/polyfills.js
+++ b/3p/polyfills.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Loads all polyfills needed by the AMP 3p integration frame.
  */
diff --git a/3p/recaptcha.js b/3p/recaptcha.js
index 489940b8f5db..cbdbedfbff09 100644
--- a/3p/recaptcha.js
+++ b/3p/recaptcha.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import './polyfills';
 
diff --git a/3p/reddit.js b/3p/reddit.js
index c4ac95658153..5d09548cc584 100644
--- a/3p/reddit.js
+++ b/3p/reddit.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript} from './3p';
 
 /**
diff --git a/3p/twitter.js b/3p/twitter.js
index d035b3b85a60..2e979dfda391 100644
--- a/3p/twitter.js
+++ b/3p/twitter.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // TODO(malteubl) Move somewhere else since this is not an ad.
 
 import {setStyles} from '#core/dom/style';
diff --git a/3p/vendors/1wo.js b/3p/vendors/1wo.js
index 23997ab914c1..ac2b296f5ec6 100644
--- a/3p/vendors/1wo.js
+++ b/3p/vendors/1wo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/24smi.js b/3p/vendors/24smi.js
index f03e123e1ee6..0218316165f4 100644
--- a/3p/vendors/24smi.js
+++ b/3p/vendors/24smi.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/3d-gltf.js b/3p/vendors/3d-gltf.js
index 1bee35789b54..1ea8441c1844 100644
--- a/3p/vendors/3d-gltf.js
+++ b/3p/vendors/3d-gltf.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/_ping_.js b/3p/vendors/_ping_.js
index 81e7086b1a01..9cdbd51aa8e6 100644
--- a/3p/vendors/_ping_.js
+++ b/3p/vendors/_ping_.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/a8.js b/3p/vendors/a8.js
index 78b05e10da8a..a1fe329b2518 100644
--- a/3p/vendors/a8.js
+++ b/3p/vendors/a8.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/a9.js b/3p/vendors/a9.js
index 52613c526014..5f43c0679672 100644
--- a/3p/vendors/a9.js
+++ b/3p/vendors/a9.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/accesstrade.js b/3p/vendors/accesstrade.js
index fb782ed3645d..b308554c2fe8 100644
--- a/3p/vendors/accesstrade.js
+++ b/3p/vendors/accesstrade.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adagio.js b/3p/vendors/adagio.js
index 584ab880aebc..f914782e0c6d 100644
--- a/3p/vendors/adagio.js
+++ b/3p/vendors/adagio.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adblade.js b/3p/vendors/adblade.js
index 14826bf3e6f9..1d4bf4d8e7bb 100644
--- a/3p/vendors/adblade.js
+++ b/3p/vendors/adblade.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adbutler.js b/3p/vendors/adbutler.js
index 44b51957630c..17f0480a6ea8 100644
--- a/3p/vendors/adbutler.js
+++ b/3p/vendors/adbutler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adform.js b/3p/vendors/adform.js
index 2d16c03a6def..ebfb4722c4c5 100644
--- a/3p/vendors/adform.js
+++ b/3p/vendors/adform.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adfox.js b/3p/vendors/adfox.js
index a21740b70b39..b8c67c7b39ce 100644
--- a/3p/vendors/adfox.js
+++ b/3p/vendors/adfox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adgeneration.js b/3p/vendors/adgeneration.js
index 67b0b75d96f3..03f7f799c545 100644
--- a/3p/vendors/adgeneration.js
+++ b/3p/vendors/adgeneration.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adglare.js b/3p/vendors/adglare.js
index 5ec4f767f399..997091e51bd3 100644
--- a/3p/vendors/adglare.js
+++ b/3p/vendors/adglare.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adhese.js b/3p/vendors/adhese.js
index 0960f45257bf..c45c35bbdcda 100644
--- a/3p/vendors/adhese.js
+++ b/3p/vendors/adhese.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adincube.js b/3p/vendors/adincube.js
index 16fdade9a267..f278a9578779 100644
--- a/3p/vendors/adincube.js
+++ b/3p/vendors/adincube.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adition.js b/3p/vendors/adition.js
index ffa383b8b472..bc82310b3078 100644
--- a/3p/vendors/adition.js
+++ b/3p/vendors/adition.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adman.js b/3p/vendors/adman.js
index 421dd5e25909..b1dbbcccbf75 100644
--- a/3p/vendors/adman.js
+++ b/3p/vendors/adman.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/admanmedia.js b/3p/vendors/admanmedia.js
index b012e604f24c..9aabacc3a4b0 100644
--- a/3p/vendors/admanmedia.js
+++ b/3p/vendors/admanmedia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/admixer.js b/3p/vendors/admixer.js
index 29e75c11022a..adab216feaab 100644
--- a/3p/vendors/admixer.js
+++ b/3p/vendors/admixer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adnuntius.js b/3p/vendors/adnuntius.js
index 07309cb3ab4e..878badc93956 100644
--- a/3p/vendors/adnuntius.js
+++ b/3p/vendors/adnuntius.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adocean.js b/3p/vendors/adocean.js
index 39abb4fdf6cc..245ad89f9105 100644
--- a/3p/vendors/adocean.js
+++ b/3p/vendors/adocean.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adop.js b/3p/vendors/adop.js
index e8d1af9c7a61..e3253ef917b6 100644
--- a/3p/vendors/adop.js
+++ b/3p/vendors/adop.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adpicker.js b/3p/vendors/adpicker.js
index 6ccf6b075943..f2c062e3585e 100644
--- a/3p/vendors/adpicker.js
+++ b/3p/vendors/adpicker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adplugg.js b/3p/vendors/adplugg.js
index 5ab1386f6666..2a1e168b006c 100644
--- a/3p/vendors/adplugg.js
+++ b/3p/vendors/adplugg.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adpon.js b/3p/vendors/adpon.js
index 652e4305e5b9..72ef8834106d 100644
--- a/3p/vendors/adpon.js
+++ b/3p/vendors/adpon.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adpushup.js b/3p/vendors/adpushup.js
index b03c7ba617dc..22be8a1ca391 100644
--- a/3p/vendors/adpushup.js
+++ b/3p/vendors/adpushup.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adreactor.js b/3p/vendors/adreactor.js
index b4c3d6dc8b0d..efb6f8e2781c 100644
--- a/3p/vendors/adreactor.js
+++ b/3p/vendors/adreactor.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adsensor.js b/3p/vendors/adsensor.js
index aaab7ec630a8..356ddf821df1 100644
--- a/3p/vendors/adsensor.js
+++ b/3p/vendors/adsensor.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adservsolutions.js b/3p/vendors/adservsolutions.js
index 90d14db71b7e..78a658dadb35 100644
--- a/3p/vendors/adservsolutions.js
+++ b/3p/vendors/adservsolutions.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adsloom.js b/3p/vendors/adsloom.js
index 054dfe8fcc05..01c30cf9fa09 100644
--- a/3p/vendors/adsloom.js
+++ b/3p/vendors/adsloom.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adsnative.js b/3p/vendors/adsnative.js
index b03c5cd173f0..11b14a259b41 100644
--- a/3p/vendors/adsnative.js
+++ b/3p/vendors/adsnative.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adspeed.js b/3p/vendors/adspeed.js
index e870c3093d8b..d0c3d45b528e 100644
--- a/3p/vendors/adspeed.js
+++ b/3p/vendors/adspeed.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adspirit.js b/3p/vendors/adspirit.js
index 80c9dd2671c1..c5b80223b9b2 100644
--- a/3p/vendors/adspirit.js
+++ b/3p/vendors/adspirit.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adstir.js b/3p/vendors/adstir.js
index 59b3380d9efc..3e501ad73384 100644
--- a/3p/vendors/adstir.js
+++ b/3p/vendors/adstir.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adstyle.js b/3p/vendors/adstyle.js
index 81322bd78507..4373bb54c37f 100644
--- a/3p/vendors/adstyle.js
+++ b/3p/vendors/adstyle.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adtech.js b/3p/vendors/adtech.js
index 1d275a5a0706..0f5d1e3231ec 100644
--- a/3p/vendors/adtech.js
+++ b/3p/vendors/adtech.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adtelligent.js b/3p/vendors/adtelligent.js
index cb9a97343369..94e6adc49958 100644
--- a/3p/vendors/adtelligent.js
+++ b/3p/vendors/adtelligent.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adthrive.js b/3p/vendors/adthrive.js
index 0373e8a1abd2..7c5d9c41790b 100644
--- a/3p/vendors/adthrive.js
+++ b/3p/vendors/adthrive.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adunity.js b/3p/vendors/adunity.js
index ef99366dcd73..6c6b37a5e3ef 100644
--- a/3p/vendors/adunity.js
+++ b/3p/vendors/adunity.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/aduptech.js b/3p/vendors/aduptech.js
index a6030becc587..df28f447425d 100644
--- a/3p/vendors/aduptech.js
+++ b/3p/vendors/aduptech.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adventive.js b/3p/vendors/adventive.js
index 92865ae4c06e..35f978f15f23 100644
--- a/3p/vendors/adventive.js
+++ b/3p/vendors/adventive.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adverline.js b/3p/vendors/adverline.js
index 66316b15d3fb..904ba7d07370 100644
--- a/3p/vendors/adverline.js
+++ b/3p/vendors/adverline.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adverticum.js b/3p/vendors/adverticum.js
index 025a70ee583d..528a66e5d36b 100644
--- a/3p/vendors/adverticum.js
+++ b/3p/vendors/adverticum.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/advertserve.js b/3p/vendors/advertserve.js
index b1d6ec25d658..26c0b22cf2c6 100644
--- a/3p/vendors/advertserve.js
+++ b/3p/vendors/advertserve.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/adyoulike.js b/3p/vendors/adyoulike.js
index 753aa147bc4d..43f7eb096dca 100644
--- a/3p/vendors/adyoulike.js
+++ b/3p/vendors/adyoulike.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/affiliateb.js b/3p/vendors/affiliateb.js
index 048ffc79a8e8..a019084a19be 100644
--- a/3p/vendors/affiliateb.js
+++ b/3p/vendors/affiliateb.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/aja.js b/3p/vendors/aja.js
index 323c5a57e94f..5baabf7e0277 100644
--- a/3p/vendors/aja.js
+++ b/3p/vendors/aja.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/amoad.js b/3p/vendors/amoad.js
index 38ddefd75de5..17afb6b7ef90 100644
--- a/3p/vendors/amoad.js
+++ b/3p/vendors/amoad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/aniview.js b/3p/vendors/aniview.js
index bab765f3724a..34278a016d01 100644
--- a/3p/vendors/aniview.js
+++ b/3p/vendors/aniview.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/anyclip.js b/3p/vendors/anyclip.js
index e139cd84eab2..84cb4e9f122e 100644
--- a/3p/vendors/anyclip.js
+++ b/3p/vendors/anyclip.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/appnexus.js b/3p/vendors/appnexus.js
index 3550b6143a96..a825c77af714 100644
--- a/3p/vendors/appnexus.js
+++ b/3p/vendors/appnexus.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/appvador.js b/3p/vendors/appvador.js
index 88813ef0c77f..b1f668e268ed 100644
--- a/3p/vendors/appvador.js
+++ b/3p/vendors/appvador.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/atomx.js b/3p/vendors/atomx.js
index ea8dc60d7cbc..295ad98d85d9 100644
--- a/3p/vendors/atomx.js
+++ b/3p/vendors/atomx.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/baidu.js b/3p/vendors/baidu.js
index 0a99e5f0bdc2..24d18e47317f 100644
--- a/3p/vendors/baidu.js
+++ b/3p/vendors/baidu.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/beaverads.js b/3p/vendors/beaverads.js
index c9da45ae07b2..712759b15e42 100644
--- a/3p/vendors/beaverads.js
+++ b/3p/vendors/beaverads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/beopinion.js b/3p/vendors/beopinion.js
index 24d0664c46ce..4721ef9606a6 100644
--- a/3p/vendors/beopinion.js
+++ b/3p/vendors/beopinion.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/bidtellect.js b/3p/vendors/bidtellect.js
index dcc85fa2e015..9640f0ade7f8 100644
--- a/3p/vendors/bidtellect.js
+++ b/3p/vendors/bidtellect.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/blade.js b/3p/vendors/blade.js
index 0082f81d2e48..3be909c9a9b3 100644
--- a/3p/vendors/blade.js
+++ b/3p/vendors/blade.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/bodymovinanimation.js b/3p/vendors/bodymovinanimation.js
index a37bb99ab826..5e881652cd46 100644
--- a/3p/vendors/bodymovinanimation.js
+++ b/3p/vendors/bodymovinanimation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/brainy.js b/3p/vendors/brainy.js
index b579b42a5bc2..4690e44f6394 100644
--- a/3p/vendors/brainy.js
+++ b/3p/vendors/brainy.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/bringhub.js b/3p/vendors/bringhub.js
index 5397dbfb6b58..884d416b16ed 100644
--- a/3p/vendors/bringhub.js
+++ b/3p/vendors/bringhub.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/broadstreetads.js b/3p/vendors/broadstreetads.js
index 0c9771ed1da5..bd6d5075bb66 100644
--- a/3p/vendors/broadstreetads.js
+++ b/3p/vendors/broadstreetads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/byplay.js b/3p/vendors/byplay.js
index ff91b94a989b..507780fcbaf9 100644
--- a/3p/vendors/byplay.js
+++ b/3p/vendors/byplay.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/caajainfeed.js b/3p/vendors/caajainfeed.js
index 8ebf47918c9b..9362b9a289e9 100644
--- a/3p/vendors/caajainfeed.js
+++ b/3p/vendors/caajainfeed.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/capirs.js b/3p/vendors/capirs.js
index 77228fb57fea..790454a0c6aa 100644
--- a/3p/vendors/capirs.js
+++ b/3p/vendors/capirs.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/caprofitx.js b/3p/vendors/caprofitx.js
index fc717282a624..ee9a1f4d43a1 100644
--- a/3p/vendors/caprofitx.js
+++ b/3p/vendors/caprofitx.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/cedato.js b/3p/vendors/cedato.js
index 6bdda5c9e425..9758ecb04ba1 100644
--- a/3p/vendors/cedato.js
+++ b/3p/vendors/cedato.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/chargeads.js b/3p/vendors/chargeads.js
index eb070e2e9170..5699375968a9 100644
--- a/3p/vendors/chargeads.js
+++ b/3p/vendors/chargeads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/colombia.js b/3p/vendors/colombia.js
index 3f6e2e8c91e3..6bc714e06f78 100644
--- a/3p/vendors/colombia.js
+++ b/3p/vendors/colombia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/conative.js b/3p/vendors/conative.js
index cde9a6cd2520..3140b28c6dbe 100644
--- a/3p/vendors/conative.js
+++ b/3p/vendors/conative.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/connatix.js b/3p/vendors/connatix.js
index d2bcb1ccca22..c21b125b250f 100644
--- a/3p/vendors/connatix.js
+++ b/3p/vendors/connatix.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/contentad.js b/3p/vendors/contentad.js
index ec797cffd838..1c1dec27273c 100644
--- a/3p/vendors/contentad.js
+++ b/3p/vendors/contentad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/criteo.js b/3p/vendors/criteo.js
index 7da0ca75c9be..0afa5185da70 100644
--- a/3p/vendors/criteo.js
+++ b/3p/vendors/criteo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/csa.js b/3p/vendors/csa.js
index c14e87f517f0..a2edd3857633 100644
--- a/3p/vendors/csa.js
+++ b/3p/vendors/csa.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/dable.js b/3p/vendors/dable.js
index dc3462407344..92fbe493744e 100644
--- a/3p/vendors/dable.js
+++ b/3p/vendors/dable.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/digiteka.js b/3p/vendors/digiteka.js
index ad97f982427d..613414d3e4d0 100644
--- a/3p/vendors/digiteka.js
+++ b/3p/vendors/digiteka.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/directadvert.js b/3p/vendors/directadvert.js
index f2faa21b2a8e..9624a91fa513 100644
--- a/3p/vendors/directadvert.js
+++ b/3p/vendors/directadvert.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/distroscale.js b/3p/vendors/distroscale.js
index c3070180ad4e..68edafe0ccd8 100644
--- a/3p/vendors/distroscale.js
+++ b/3p/vendors/distroscale.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/dotandads.js b/3p/vendors/dotandads.js
index a694c346719b..2592724bf2d4 100644
--- a/3p/vendors/dotandads.js
+++ b/3p/vendors/dotandads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/dynad.js b/3p/vendors/dynad.js
index a75c1dda99bf..3e35a70c04eb 100644
--- a/3p/vendors/dynad.js
+++ b/3p/vendors/dynad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/eadv.js b/3p/vendors/eadv.js
index 0bd6aa32228e..f9e929078d8d 100644
--- a/3p/vendors/eadv.js
+++ b/3p/vendors/eadv.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/embedly.js b/3p/vendors/embedly.js
index 8b9b435ce89e..03ba66fcaf52 100644
--- a/3p/vendors/embedly.js
+++ b/3p/vendors/embedly.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/empower.js b/3p/vendors/empower.js
index da0418b0d3b8..45120b34326e 100644
--- a/3p/vendors/empower.js
+++ b/3p/vendors/empower.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/engageya.js b/3p/vendors/engageya.js
index a78ef7c255eb..9c1c92018ff8 100644
--- a/3p/vendors/engageya.js
+++ b/3p/vendors/engageya.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/epeex.js b/3p/vendors/epeex.js
index b461cc1ce1c7..995d22056cfe 100644
--- a/3p/vendors/epeex.js
+++ b/3p/vendors/epeex.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/eplanning.js b/3p/vendors/eplanning.js
index f3e538739eb1..7d1ddf0bea0c 100644
--- a/3p/vendors/eplanning.js
+++ b/3p/vendors/eplanning.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/exco.js b/3p/vendors/exco.js
index 6529c01f2d2e..8011eea7c286 100644
--- a/3p/vendors/exco.js
+++ b/3p/vendors/exco.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/ezoic.js b/3p/vendors/ezoic.js
index 3c9a0ee30ad3..ca7413775640 100644
--- a/3p/vendors/ezoic.js
+++ b/3p/vendors/ezoic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/f1e.js b/3p/vendors/f1e.js
index 8ca3025c576e..dc0a794a3959 100644
--- a/3p/vendors/f1e.js
+++ b/3p/vendors/f1e.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/f1h.js b/3p/vendors/f1h.js
index 24036059884a..67942e2f4122 100644
--- a/3p/vendors/f1h.js
+++ b/3p/vendors/f1h.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/facebook.js b/3p/vendors/facebook.js
index a1825cd0565a..54e5e2ecdd4c 100644
--- a/3p/vendors/facebook.js
+++ b/3p/vendors/facebook.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/fake-delayed.js b/3p/vendors/fake-delayed.js
index 88a3aa20804c..963536659ff3 100644
--- a/3p/vendors/fake-delayed.js
+++ b/3p/vendors/fake-delayed.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/feedad.js b/3p/vendors/feedad.js
index 5be02cc8f7bf..c7887020fd91 100644
--- a/3p/vendors/feedad.js
+++ b/3p/vendors/feedad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/felmat.js b/3p/vendors/felmat.js
index fdf6ff41a624..be7e9915ac3a 100644
--- a/3p/vendors/felmat.js
+++ b/3p/vendors/felmat.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/finative.js b/3p/vendors/finative.js
index 46c744060d1b..0bac04dd5693 100644
--- a/3p/vendors/finative.js
+++ b/3p/vendors/finative.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/firstimpression.js b/3p/vendors/firstimpression.js
index 7fb9f4fc2bd2..d9881224e3ac 100644
--- a/3p/vendors/firstimpression.js
+++ b/3p/vendors/firstimpression.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/flite.js b/3p/vendors/flite.js
index 61733af9e5eb..9a51bd51dc86 100644
--- a/3p/vendors/flite.js
+++ b/3p/vendors/flite.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/fluct.js b/3p/vendors/fluct.js
index ac228630f342..518862466683 100644
--- a/3p/vendors/fluct.js
+++ b/3p/vendors/fluct.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/forkmedia.js b/3p/vendors/forkmedia.js
index 488a922813fc..b3473a3aec8d 100644
--- a/3p/vendors/forkmedia.js
+++ b/3p/vendors/forkmedia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/freewheel.js b/3p/vendors/freewheel.js
index 9669c6417e71..c29bdea77a8b 100644
--- a/3p/vendors/freewheel.js
+++ b/3p/vendors/freewheel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/fusion.js b/3p/vendors/fusion.js
index 42baa27e5c87..5838e9b8fea4 100644
--- a/3p/vendors/fusion.js
+++ b/3p/vendors/fusion.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/gecko.js b/3p/vendors/gecko.js
index bcb2af2ece43..bbf517c9350a 100644
--- a/3p/vendors/gecko.js
+++ b/3p/vendors/gecko.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/genieessp.js b/3p/vendors/genieessp.js
index a862f70901ad..836256b500f4 100644
--- a/3p/vendors/genieessp.js
+++ b/3p/vendors/genieessp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/giraff.js b/3p/vendors/giraff.js
index ae050508cc9e..f816161c8bec 100644
--- a/3p/vendors/giraff.js
+++ b/3p/vendors/giraff.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/github.js b/3p/vendors/github.js
index c90b0ed41487..570f7ae74c25 100644
--- a/3p/vendors/github.js
+++ b/3p/vendors/github.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/glomex.js b/3p/vendors/glomex.js
index 41cb44e828ce..bf3b0ee2093b 100644
--- a/3p/vendors/glomex.js
+++ b/3p/vendors/glomex.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/gmossp.js b/3p/vendors/gmossp.js
index d8312d8462f0..e2147c80df31 100644
--- a/3p/vendors/gmossp.js
+++ b/3p/vendors/gmossp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/gumgum.js b/3p/vendors/gumgum.js
index c0fc4e1ba813..85e41d87f3cd 100644
--- a/3p/vendors/gumgum.js
+++ b/3p/vendors/gumgum.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/holder.js b/3p/vendors/holder.js
index 109f12ec509c..f11dc75fc7bf 100644
--- a/3p/vendors/holder.js
+++ b/3p/vendors/holder.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/ibillboard.js b/3p/vendors/ibillboard.js
index 288ea0c87c06..10c33c8535e3 100644
--- a/3p/vendors/ibillboard.js
+++ b/3p/vendors/ibillboard.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/idealmedia.js b/3p/vendors/idealmedia.js
index 9b3883af849e..e4aa86d31c18 100644
--- a/3p/vendors/idealmedia.js
+++ b/3p/vendors/idealmedia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/ima-video.js b/3p/vendors/ima-video.js
index 4de9792214de..6d461d5fb52c 100644
--- a/3p/vendors/ima-video.js
+++ b/3p/vendors/ima-video.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/imedia.js b/3p/vendors/imedia.js
index d4464692cbdc..86ccaa15f7fc 100644
--- a/3p/vendors/imedia.js
+++ b/3p/vendors/imedia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/imobile.js b/3p/vendors/imobile.js
index a0ee82325700..8b2c0ab13265 100644
--- a/3p/vendors/imobile.js
+++ b/3p/vendors/imobile.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/imonomy.js b/3p/vendors/imonomy.js
index a58726a7ba8c..a0a55aee7265 100644
--- a/3p/vendors/imonomy.js
+++ b/3p/vendors/imonomy.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/improvedigital.js b/3p/vendors/improvedigital.js
index f31423e20e94..94fa91b32b87 100644
--- a/3p/vendors/improvedigital.js
+++ b/3p/vendors/improvedigital.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/industrybrains.js b/3p/vendors/industrybrains.js
index eb814dfd395f..e765a5961169 100644
--- a/3p/vendors/industrybrains.js
+++ b/3p/vendors/industrybrains.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/inmobi.js b/3p/vendors/inmobi.js
index 209bcbb2415e..4cb9bb7449d6 100644
--- a/3p/vendors/inmobi.js
+++ b/3p/vendors/inmobi.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/innity.js b/3p/vendors/innity.js
index 158fa1708869..0c5363d46e29 100644
--- a/3p/vendors/innity.js
+++ b/3p/vendors/innity.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/insticator.js b/3p/vendors/insticator.js
index 5f063b7f000b..51561490eb68 100644
--- a/3p/vendors/insticator.js
+++ b/3p/vendors/insticator.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/invibes.js b/3p/vendors/invibes.js
index 36fd94a52bfc..be6d03e35a60 100644
--- a/3p/vendors/invibes.js
+++ b/3p/vendors/invibes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/iprom.js b/3p/vendors/iprom.js
index 0d283456b8de..ea5f9d919ec2 100644
--- a/3p/vendors/iprom.js
+++ b/3p/vendors/iprom.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/ix.js b/3p/vendors/ix.js
index 94359d421d65..e39cb7730334 100644
--- a/3p/vendors/ix.js
+++ b/3p/vendors/ix.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/jixie.js b/3p/vendors/jixie.js
index ccf3a6a9a3fc..c1ba9fa1d052 100644
--- a/3p/vendors/jixie.js
+++ b/3p/vendors/jixie.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/jubna.js b/3p/vendors/jubna.js
index 1c7e9ea3cb24..e2a6fa77ab12 100644
--- a/3p/vendors/jubna.js
+++ b/3p/vendors/jubna.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/kargo.js b/3p/vendors/kargo.js
index 09c6503b2b7d..f74cd89d01aa 100644
--- a/3p/vendors/kargo.js
+++ b/3p/vendors/kargo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/ketshwa.js b/3p/vendors/ketshwa.js
index 0f9266bba68d..4892b8241823 100644
--- a/3p/vendors/ketshwa.js
+++ b/3p/vendors/ketshwa.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/kiosked.js b/3p/vendors/kiosked.js
index 4c8c27da8342..cea8b3cafde8 100644
--- a/3p/vendors/kiosked.js
+++ b/3p/vendors/kiosked.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/kixer.js b/3p/vendors/kixer.js
index 87ada20016e8..959000ad65bb 100644
--- a/3p/vendors/kixer.js
+++ b/3p/vendors/kixer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/kuadio.js b/3p/vendors/kuadio.js
index fce4abb94df7..f57692e70254 100644
--- a/3p/vendors/kuadio.js
+++ b/3p/vendors/kuadio.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/lentainform.js b/3p/vendors/lentainform.js
index f34c9e445989..88b18c1081e4 100644
--- a/3p/vendors/lentainform.js
+++ b/3p/vendors/lentainform.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/ligatus.js b/3p/vendors/ligatus.js
index c482d8df9d71..f31c0bd83f4f 100644
--- a/3p/vendors/ligatus.js
+++ b/3p/vendors/ligatus.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/lockerdome.js b/3p/vendors/lockerdome.js
index d5b3b0075236..683b52c8f670 100644
--- a/3p/vendors/lockerdome.js
+++ b/3p/vendors/lockerdome.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/logly.js b/3p/vendors/logly.js
index d63297ba10bb..635e2eeb6e3c 100644
--- a/3p/vendors/logly.js
+++ b/3p/vendors/logly.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/loka.js b/3p/vendors/loka.js
index 682e952b29db..61429af8ed39 100644
--- a/3p/vendors/loka.js
+++ b/3p/vendors/loka.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/luckyads.js b/3p/vendors/luckyads.js
index 5f9ad813ab1f..5a94af171e7d 100644
--- a/3p/vendors/luckyads.js
+++ b/3p/vendors/luckyads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/macaw.js b/3p/vendors/macaw.js
index 6edb215eaa1b..f16055f33f58 100644
--- a/3p/vendors/macaw.js
+++ b/3p/vendors/macaw.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/mads.js b/3p/vendors/mads.js
index ca5362fa3b02..42a800f8c605 100644
--- a/3p/vendors/mads.js
+++ b/3p/vendors/mads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/mantis-display.js b/3p/vendors/mantis-display.js
index 174b3c524c5e..b80b30d3a8c2 100644
--- a/3p/vendors/mantis-display.js
+++ b/3p/vendors/mantis-display.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/mantis-recommend.js b/3p/vendors/mantis-recommend.js
index 06d7452c0c5a..82cdb69d96f1 100644
--- a/3p/vendors/mantis-recommend.js
+++ b/3p/vendors/mantis-recommend.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/marfeel.js b/3p/vendors/marfeel.js
index 7476ec4ab9e9..aece59acabff 100644
--- a/3p/vendors/marfeel.js
+++ b/3p/vendors/marfeel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/mathml.js b/3p/vendors/mathml.js
index 0be9ddbb467c..25cad2ccb8b5 100644
--- a/3p/vendors/mathml.js
+++ b/3p/vendors/mathml.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/mediaad.js b/3p/vendors/mediaad.js
index 5bf531b2de66..6cd0af8e8088 100644
--- a/3p/vendors/mediaad.js
+++ b/3p/vendors/mediaad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/medianet.js b/3p/vendors/medianet.js
index 548733b89e6b..e8789314af54 100644
--- a/3p/vendors/medianet.js
+++ b/3p/vendors/medianet.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/mediavine.js b/3p/vendors/mediavine.js
index 1a50dab493f1..c0f1c66d2534 100644
--- a/3p/vendors/mediavine.js
+++ b/3p/vendors/mediavine.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/medyanet.js b/3p/vendors/medyanet.js
index 0b0f73ddbcbc..8f0ee469a455 100644
--- a/3p/vendors/medyanet.js
+++ b/3p/vendors/medyanet.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/meg.js b/3p/vendors/meg.js
index 55e5f45540e3..3daf06c8b4f4 100644
--- a/3p/vendors/meg.js
+++ b/3p/vendors/meg.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/mgid.js b/3p/vendors/mgid.js
index 6a7a94eeefae..b5b19f9abc55 100644
--- a/3p/vendors/mgid.js
+++ b/3p/vendors/mgid.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/microad.js b/3p/vendors/microad.js
index da3c5308a6c6..e820b71fbb8d 100644
--- a/3p/vendors/microad.js
+++ b/3p/vendors/microad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/miximedia.js b/3p/vendors/miximedia.js
index d30ee920fbb2..ac1e6affc0b4 100644
--- a/3p/vendors/miximedia.js
+++ b/3p/vendors/miximedia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/mixpo.js b/3p/vendors/mixpo.js
index 3646b16ed580..fc0b66cd40a6 100644
--- a/3p/vendors/mixpo.js
+++ b/3p/vendors/mixpo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/monetizer101.js b/3p/vendors/monetizer101.js
index fa1131eb0506..8bd7d7fee8e5 100644
--- a/3p/vendors/monetizer101.js
+++ b/3p/vendors/monetizer101.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/mox.js b/3p/vendors/mox.js
index 22299ec9edf1..ee7f506c48b2 100644
--- a/3p/vendors/mox.js
+++ b/3p/vendors/mox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/my6sense.js b/3p/vendors/my6sense.js
index b352d8a0fc74..84db0f261e70 100644
--- a/3p/vendors/my6sense.js
+++ b/3p/vendors/my6sense.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/myfinance.js b/3p/vendors/myfinance.js
index e36a3d744d20..321c399f2381 100644
--- a/3p/vendors/myfinance.js
+++ b/3p/vendors/myfinance.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/myoffrz.js b/3p/vendors/myoffrz.js
index 6228a3d5350e..0c10043ae257 100644
--- a/3p/vendors/myoffrz.js
+++ b/3p/vendors/myoffrz.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/mytarget.js b/3p/vendors/mytarget.js
index bc188b03a6f6..b76b65267d7f 100644
--- a/3p/vendors/mytarget.js
+++ b/3p/vendors/mytarget.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/mywidget.js b/3p/vendors/mywidget.js
index f1ce9ebf1a70..0e147db20696 100644
--- a/3p/vendors/mywidget.js
+++ b/3p/vendors/mywidget.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/nativeroll.js b/3p/vendors/nativeroll.js
index c0013b88356b..68cbba37fd81 100644
--- a/3p/vendors/nativeroll.js
+++ b/3p/vendors/nativeroll.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/nativery.js b/3p/vendors/nativery.js
index ce43186acb86..c2545f671ae2 100644
--- a/3p/vendors/nativery.js
+++ b/3p/vendors/nativery.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/nativo.js b/3p/vendors/nativo.js
index 236fbb60bcc7..7a1dad0605ae 100644
--- a/3p/vendors/nativo.js
+++ b/3p/vendors/nativo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/navegg.js b/3p/vendors/navegg.js
index 7a3baea7898a..c5201dcb8851 100644
--- a/3p/vendors/navegg.js
+++ b/3p/vendors/navegg.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/nend.js b/3p/vendors/nend.js
index 2326493d3247..32b210dec976 100644
--- a/3p/vendors/nend.js
+++ b/3p/vendors/nend.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/netletix.js b/3p/vendors/netletix.js
index 250f16079b1b..cdea0979be85 100644
--- a/3p/vendors/netletix.js
+++ b/3p/vendors/netletix.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/noddus.js b/3p/vendors/noddus.js
index 527a90a6e8fe..8e95e32c007c 100644
--- a/3p/vendors/noddus.js
+++ b/3p/vendors/noddus.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/nokta.js b/3p/vendors/nokta.js
index 9d5d71c6bf6a..85725e5d17f6 100644
--- a/3p/vendors/nokta.js
+++ b/3p/vendors/nokta.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/nws.js b/3p/vendors/nws.js
index 702ef13814b6..2b34a424f145 100644
--- a/3p/vendors/nws.js
+++ b/3p/vendors/nws.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/oblivki.js b/3p/vendors/oblivki.js
index d9003b53fad0..906b861fe5c1 100644
--- a/3p/vendors/oblivki.js
+++ b/3p/vendors/oblivki.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/onead.js b/3p/vendors/onead.js
index 70b81a640561..14e43bc6b220 100644
--- a/3p/vendors/onead.js
+++ b/3p/vendors/onead.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/onnetwork.js b/3p/vendors/onnetwork.js
index 62f9f10bec5c..f44b9b9e93d6 100644
--- a/3p/vendors/onnetwork.js
+++ b/3p/vendors/onnetwork.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/openadstream.js b/3p/vendors/openadstream.js
index 7db15b4faf5b..ec45335e78db 100644
--- a/3p/vendors/openadstream.js
+++ b/3p/vendors/openadstream.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/openx.js b/3p/vendors/openx.js
index c570a7191827..35a4567ccf6a 100644
--- a/3p/vendors/openx.js
+++ b/3p/vendors/openx.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/opinary.js b/3p/vendors/opinary.js
index c1d56735a8aa..ea79a1d34516 100644
--- a/3p/vendors/opinary.js
+++ b/3p/vendors/opinary.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/outbrain.js b/3p/vendors/outbrain.js
index 5368a0b03c93..013f6ad4a23e 100644
--- a/3p/vendors/outbrain.js
+++ b/3p/vendors/outbrain.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/pixels.js b/3p/vendors/pixels.js
index 27ad88d5ff13..71da8903eadf 100644
--- a/3p/vendors/pixels.js
+++ b/3p/vendors/pixels.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/playstream.js b/3p/vendors/playstream.js
index 99907ea5c68f..e470d884437f 100644
--- a/3p/vendors/playstream.js
+++ b/3p/vendors/playstream.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/plista.js b/3p/vendors/plista.js
index 96db719d11a0..4ddffa9de3a4 100644
--- a/3p/vendors/plista.js
+++ b/3p/vendors/plista.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/polymorphicads.js b/3p/vendors/polymorphicads.js
index 3f5bf9350ac2..05814cc299d0 100644
--- a/3p/vendors/polymorphicads.js
+++ b/3p/vendors/polymorphicads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/popin.js b/3p/vendors/popin.js
index c1bcd47fe81e..3665e86898b1 100644
--- a/3p/vendors/popin.js
+++ b/3p/vendors/popin.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/postquare.js b/3p/vendors/postquare.js
index 794799484023..f9c52233947c 100644
--- a/3p/vendors/postquare.js
+++ b/3p/vendors/postquare.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/ppstudio.js b/3p/vendors/ppstudio.js
index dfc60cd0c56e..0779872b4b5b 100644
--- a/3p/vendors/ppstudio.js
+++ b/3p/vendors/ppstudio.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/pressboard.js b/3p/vendors/pressboard.js
index 74983e2133db..b80e4cfb8092 100644
--- a/3p/vendors/pressboard.js
+++ b/3p/vendors/pressboard.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/promoteiq.js b/3p/vendors/promoteiq.js
index d1ce9b5ce32e..81ede7d24dca 100644
--- a/3p/vendors/promoteiq.js
+++ b/3p/vendors/promoteiq.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/pubexchange.js b/3p/vendors/pubexchange.js
index 341760243c10..e4ef1ee46287 100644
--- a/3p/vendors/pubexchange.js
+++ b/3p/vendors/pubexchange.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/pubguru.js b/3p/vendors/pubguru.js
index 7f0c4406401c..dbf0c34f41a6 100644
--- a/3p/vendors/pubguru.js
+++ b/3p/vendors/pubguru.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/pubmatic.js b/3p/vendors/pubmatic.js
index 99da0b885dad..28553aa8357c 100644
--- a/3p/vendors/pubmatic.js
+++ b/3p/vendors/pubmatic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/pubmine.js b/3p/vendors/pubmine.js
index fddcaff12b11..e12039905bb7 100644
--- a/3p/vendors/pubmine.js
+++ b/3p/vendors/pubmine.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/puffnetwork.js b/3p/vendors/puffnetwork.js
index 7561780b9fe8..39c070311cf4 100644
--- a/3p/vendors/puffnetwork.js
+++ b/3p/vendors/puffnetwork.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/pulse.js b/3p/vendors/pulse.js
index 1088d6d060bf..59da6a79f0b6 100644
--- a/3p/vendors/pulse.js
+++ b/3p/vendors/pulse.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/pulsepoint.js b/3p/vendors/pulsepoint.js
index ab5d3d2c6665..d111210e07c5 100644
--- a/3p/vendors/pulsepoint.js
+++ b/3p/vendors/pulsepoint.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/purch.js b/3p/vendors/purch.js
index 2af1a7833da7..8a53484c414d 100644
--- a/3p/vendors/purch.js
+++ b/3p/vendors/purch.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/quoraad.js b/3p/vendors/quoraad.js
index e30802b4cbd9..7a4ae4d3fea0 100644
--- a/3p/vendors/quoraad.js
+++ b/3p/vendors/quoraad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/rakutenunifiedads.js b/3p/vendors/rakutenunifiedads.js
index e1f7f9141631..b0b2961d3134 100644
--- a/3p/vendors/rakutenunifiedads.js
+++ b/3p/vendors/rakutenunifiedads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/rbinfox.js b/3p/vendors/rbinfox.js
index c71d2916bba9..9e603b5138c2 100644
--- a/3p/vendors/rbinfox.js
+++ b/3p/vendors/rbinfox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/rcmwidget.js b/3p/vendors/rcmwidget.js
index 3340036dbdfe..6ebcdbaf5068 100644
--- a/3p/vendors/rcmwidget.js
+++ b/3p/vendors/rcmwidget.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/readmo.js b/3p/vendors/readmo.js
index eff367fa9949..4db6a328121a 100644
--- a/3p/vendors/readmo.js
+++ b/3p/vendors/readmo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/realclick.js b/3p/vendors/realclick.js
index 9ecccd0c4a6c..60c3d66eacea 100644
--- a/3p/vendors/realclick.js
+++ b/3p/vendors/realclick.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/recomad.js b/3p/vendors/recomad.js
index 52399b5b39b1..b1eb55e849f1 100644
--- a/3p/vendors/recomad.js
+++ b/3p/vendors/recomad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/recreativ.js b/3p/vendors/recreativ.js
index a23ff6e9f12c..c4d429bb166a 100644
--- a/3p/vendors/recreativ.js
+++ b/3p/vendors/recreativ.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/reddit.js b/3p/vendors/reddit.js
index 4b347ac9e0c7..610d6908da66 100644
--- a/3p/vendors/reddit.js
+++ b/3p/vendors/reddit.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/relap.js b/3p/vendors/relap.js
index 120ea0c0bae9..8c4391b1abe2 100644
--- a/3p/vendors/relap.js
+++ b/3p/vendors/relap.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/relappro.js b/3p/vendors/relappro.js
index 2a7d43a50255..e426f01388d1 100644
--- a/3p/vendors/relappro.js
+++ b/3p/vendors/relappro.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/remixd.js b/3p/vendors/remixd.js
index bebf9f2540e4..1456ee5f3db4 100644
--- a/3p/vendors/remixd.js
+++ b/3p/vendors/remixd.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/revcontent.js b/3p/vendors/revcontent.js
index 87faf8bf5f6d..43ce5dc78ce6 100644
--- a/3p/vendors/revcontent.js
+++ b/3p/vendors/revcontent.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/revjet.js b/3p/vendors/revjet.js
index b84386558d02..d85d4ab16c89 100644
--- a/3p/vendors/revjet.js
+++ b/3p/vendors/revjet.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/rfp.js b/3p/vendors/rfp.js
index 6d62f642ee27..a79b9582d0ec 100644
--- a/3p/vendors/rfp.js
+++ b/3p/vendors/rfp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/rnetplus.js b/3p/vendors/rnetplus.js
index 9d8657faafea..c2f0fd32ded7 100644
--- a/3p/vendors/rnetplus.js
+++ b/3p/vendors/rnetplus.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/rubicon.js b/3p/vendors/rubicon.js
index 8a6020114635..051a9a4b34b6 100644
--- a/3p/vendors/rubicon.js
+++ b/3p/vendors/rubicon.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/runative.js b/3p/vendors/runative.js
index 1c03651268d7..61158467b837 100644
--- a/3p/vendors/runative.js
+++ b/3p/vendors/runative.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/sas.js b/3p/vendors/sas.js
index 63c6c2cb0bbf..0d9e98112f44 100644
--- a/3p/vendors/sas.js
+++ b/3p/vendors/sas.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/seedingalliance.js b/3p/vendors/seedingalliance.js
index 10026714adf1..3a017c3bd053 100644
--- a/3p/vendors/seedingalliance.js
+++ b/3p/vendors/seedingalliance.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/sekindo.js b/3p/vendors/sekindo.js
index f062127cbd3e..945c9c7cbd92 100644
--- a/3p/vendors/sekindo.js
+++ b/3p/vendors/sekindo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/sharethrough.js b/3p/vendors/sharethrough.js
index 7b1986e3b2e2..cfa3bfd87fea 100644
--- a/3p/vendors/sharethrough.js
+++ b/3p/vendors/sharethrough.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/shemedia.js b/3p/vendors/shemedia.js
index f3444dfcfe0f..fa91f653873a 100644
--- a/3p/vendors/shemedia.js
+++ b/3p/vendors/shemedia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/sklik.js b/3p/vendors/sklik.js
index c419944f84bc..cbbc7716a8b3 100644
--- a/3p/vendors/sklik.js
+++ b/3p/vendors/sklik.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/slimcutmedia.js b/3p/vendors/slimcutmedia.js
index e4f1db36993e..1c2cb62e1e8e 100644
--- a/3p/vendors/slimcutmedia.js
+++ b/3p/vendors/slimcutmedia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/smartadserver.js b/3p/vendors/smartadserver.js
index 5047534a8e52..b93432464cc0 100644
--- a/3p/vendors/smartadserver.js
+++ b/3p/vendors/smartadserver.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/smartclip.js b/3p/vendors/smartclip.js
index 4b28c05e9d68..b38ea38a032c 100644
--- a/3p/vendors/smartclip.js
+++ b/3p/vendors/smartclip.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/smi2.js b/3p/vendors/smi2.js
index 4f114b82f594..b4442a2450ae 100644
--- a/3p/vendors/smi2.js
+++ b/3p/vendors/smi2.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/smilewanted.js b/3p/vendors/smilewanted.js
index 94784e637697..8da0f9b39d59 100644
--- a/3p/vendors/smilewanted.js
+++ b/3p/vendors/smilewanted.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/sogouad.js b/3p/vendors/sogouad.js
index c1672ce188b6..9274a112f4c1 100644
--- a/3p/vendors/sogouad.js
+++ b/3p/vendors/sogouad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/sona.js b/3p/vendors/sona.js
index 4693b2bd56fc..2e8811a85757 100644
--- a/3p/vendors/sona.js
+++ b/3p/vendors/sona.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/sortable.js b/3p/vendors/sortable.js
index 0bb5f30777e1..ea2957711b17 100644
--- a/3p/vendors/sortable.js
+++ b/3p/vendors/sortable.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/sovrn.js b/3p/vendors/sovrn.js
index 98f4d7c4843d..7b82c4009ef1 100644
--- a/3p/vendors/sovrn.js
+++ b/3p/vendors/sovrn.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/speakol.js b/3p/vendors/speakol.js
index fd98cbd4adbd..5a746d3c6f57 100644
--- a/3p/vendors/speakol.js
+++ b/3p/vendors/speakol.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/spotx.js b/3p/vendors/spotx.js
index 165cccaf28be..f6157c84bae5 100644
--- a/3p/vendors/spotx.js
+++ b/3p/vendors/spotx.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/springAds.js b/3p/vendors/springAds.js
index 41f7faa0be74..cdb9c66b6e90 100644
--- a/3p/vendors/springAds.js
+++ b/3p/vendors/springAds.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/ssp.js b/3p/vendors/ssp.js
index 00b7fefc4551..c124e5da48d8 100644
--- a/3p/vendors/ssp.js
+++ b/3p/vendors/ssp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/strossle.js b/3p/vendors/strossle.js
index 02b425d70fd1..d501582aedee 100644
--- a/3p/vendors/strossle.js
+++ b/3p/vendors/strossle.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/sulvo.js b/3p/vendors/sulvo.js
index a1c28fb90533..b68b3d2b900b 100644
--- a/3p/vendors/sulvo.js
+++ b/3p/vendors/sulvo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/sunmedia.js b/3p/vendors/sunmedia.js
index 79aa0189d1d7..3d851141c502 100644
--- a/3p/vendors/sunmedia.js
+++ b/3p/vendors/sunmedia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/svknative.js b/3p/vendors/svknative.js
index dff1526c35e2..5824f4ce529c 100644
--- a/3p/vendors/svknative.js
+++ b/3p/vendors/svknative.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/swoop.js b/3p/vendors/swoop.js
index a69f05e9f440..bbf2c8b8df80 100644
--- a/3p/vendors/swoop.js
+++ b/3p/vendors/swoop.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/taboola.js b/3p/vendors/taboola.js
index 26719186b11a..765efc875720 100644
--- a/3p/vendors/taboola.js
+++ b/3p/vendors/taboola.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/tagon.js b/3p/vendors/tagon.js
index b66127d4ead8..51eb2cb310e3 100644
--- a/3p/vendors/tagon.js
+++ b/3p/vendors/tagon.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/tail.js b/3p/vendors/tail.js
index e5ea6230c229..2b8ebbc7cbc7 100644
--- a/3p/vendors/tail.js
+++ b/3p/vendors/tail.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/tcsemotion.js b/3p/vendors/tcsemotion.js
index 763b18931368..3797f5cad900 100644
--- a/3p/vendors/tcsemotion.js
+++ b/3p/vendors/tcsemotion.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/teads.js b/3p/vendors/teads.js
index df9a879fc62a..8c8b49e25a54 100644
--- a/3p/vendors/teads.js
+++ b/3p/vendors/teads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/temedya.js b/3p/vendors/temedya.js
index b316672aab52..cf7d2ea0e799 100644
--- a/3p/vendors/temedya.js
+++ b/3p/vendors/temedya.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/torimochi.js b/3p/vendors/torimochi.js
index 529e5a5ca012..1f50b547db71 100644
--- a/3p/vendors/torimochi.js
+++ b/3p/vendors/torimochi.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/tracdelight.js b/3p/vendors/tracdelight.js
index 8744ec49cd03..7b2cf9f82be3 100644
--- a/3p/vendors/tracdelight.js
+++ b/3p/vendors/tracdelight.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/triplelift.js b/3p/vendors/triplelift.js
index 7b91f52f4032..88ad93be8048 100644
--- a/3p/vendors/triplelift.js
+++ b/3p/vendors/triplelift.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/trugaze.js b/3p/vendors/trugaze.js
index 485aa1c1120d..a2a160129756 100644
--- a/3p/vendors/trugaze.js
+++ b/3p/vendors/trugaze.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/twitter.js b/3p/vendors/twitter.js
index 905b6e22189f..05807486a132 100644
--- a/3p/vendors/twitter.js
+++ b/3p/vendors/twitter.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/uas.js b/3p/vendors/uas.js
index 5073f8cf0d26..9a4fcb74c013 100644
--- a/3p/vendors/uas.js
+++ b/3p/vendors/uas.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/ucfunnel.js b/3p/vendors/ucfunnel.js
index e146ec3a443c..b60f6b07dbeb 100644
--- a/3p/vendors/ucfunnel.js
+++ b/3p/vendors/ucfunnel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/unruly.js b/3p/vendors/unruly.js
index 97e12eec33d3..852d6a8b2ffa 100644
--- a/3p/vendors/unruly.js
+++ b/3p/vendors/unruly.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/uzou.js b/3p/vendors/uzou.js
index dfa98964bd15..db8cd32de657 100644
--- a/3p/vendors/uzou.js
+++ b/3p/vendors/uzou.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/valuecommerce.js b/3p/vendors/valuecommerce.js
index 5aaf7041a307..29457bd37270 100644
--- a/3p/vendors/valuecommerce.js
+++ b/3p/vendors/valuecommerce.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/vdoai.js b/3p/vendors/vdoai.js
index 3d0b3436cbaf..c2fc1244feb6 100644
--- a/3p/vendors/vdoai.js
+++ b/3p/vendors/vdoai.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/verizonmedia.js b/3p/vendors/verizonmedia.js
index 892d589282d0..944bc18f5d26 100644
--- a/3p/vendors/verizonmedia.js
+++ b/3p/vendors/verizonmedia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/videointelligence.js b/3p/vendors/videointelligence.js
index 3a8c1a9bf329..671f589882c6 100644
--- a/3p/vendors/videointelligence.js
+++ b/3p/vendors/videointelligence.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/videonow.js b/3p/vendors/videonow.js
index f773384d30d2..cdd25b132486 100644
--- a/3p/vendors/videonow.js
+++ b/3p/vendors/videonow.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/viqeoplayer.js b/3p/vendors/viqeoplayer.js
index c3e3511c6ea1..0a8d3688d8e5 100644
--- a/3p/vendors/viqeoplayer.js
+++ b/3p/vendors/viqeoplayer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/viralize.js b/3p/vendors/viralize.js
index 9c7904ae034d..b9f6c0bd8709 100644
--- a/3p/vendors/viralize.js
+++ b/3p/vendors/viralize.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/vlyby.js b/3p/vendors/vlyby.js
index 551d7589f2cc..125c6b011c63 100644
--- a/3p/vendors/vlyby.js
+++ b/3p/vendors/vlyby.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/vmfive.js b/3p/vendors/vmfive.js
index f95e0462fa4a..3fa6570b33d6 100644
--- a/3p/vendors/vmfive.js
+++ b/3p/vendors/vmfive.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/webediads.js b/3p/vendors/webediads.js
index 402270b2f554..8a9acdbf1a33 100644
--- a/3p/vendors/webediads.js
+++ b/3p/vendors/webediads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/weborama-display.js b/3p/vendors/weborama-display.js
index 4ee2f12f3caf..168721e9d99e 100644
--- a/3p/vendors/weborama-display.js
+++ b/3p/vendors/weborama-display.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/whopainfeed.js b/3p/vendors/whopainfeed.js
index c72aada1c56b..cfe42203f39e 100644
--- a/3p/vendors/whopainfeed.js
+++ b/3p/vendors/whopainfeed.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/widespace.js b/3p/vendors/widespace.js
index 416ce9443c32..b284f6402c93 100644
--- a/3p/vendors/widespace.js
+++ b/3p/vendors/widespace.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/wisteria.js b/3p/vendors/wisteria.js
index 6bba47d429e0..9c178359af1f 100644
--- a/3p/vendors/wisteria.js
+++ b/3p/vendors/wisteria.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/wpmedia.js b/3p/vendors/wpmedia.js
index 227485349d31..a03e058a003b 100644
--- a/3p/vendors/wpmedia.js
+++ b/3p/vendors/wpmedia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/wunderkind.js b/3p/vendors/wunderkind.js
index 9c960d126b6a..20430e3eb336 100644
--- a/3p/vendors/wunderkind.js
+++ b/3p/vendors/wunderkind.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/xlift.js b/3p/vendors/xlift.js
index 40b2f5a0b194..89f8aac831b2 100644
--- a/3p/vendors/xlift.js
+++ b/3p/vendors/xlift.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/yahoo.js b/3p/vendors/yahoo.js
index 6e0bf2809b95..2d0f5475c193 100644
--- a/3p/vendors/yahoo.js
+++ b/3p/vendors/yahoo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/yahoofedads.js b/3p/vendors/yahoofedads.js
index 2f29b3aa599c..7626043140a9 100644
--- a/3p/vendors/yahoofedads.js
+++ b/3p/vendors/yahoofedads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/yahoojp.js b/3p/vendors/yahoojp.js
index e1a027c15fa9..6c390ea1ea8d 100644
--- a/3p/vendors/yahoojp.js
+++ b/3p/vendors/yahoojp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/yahoonativeads.js b/3p/vendors/yahoonativeads.js
index e00468da5204..d0a04dbb64a1 100644
--- a/3p/vendors/yahoonativeads.js
+++ b/3p/vendors/yahoonativeads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/yandex.js b/3p/vendors/yandex.js
index 3bc1d8fcbfe6..566a7832dcd2 100644
--- a/3p/vendors/yandex.js
+++ b/3p/vendors/yandex.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/yektanet.js b/3p/vendors/yektanet.js
index 0b937e33c7c4..9165f4006e22 100644
--- a/3p/vendors/yektanet.js
+++ b/3p/vendors/yektanet.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/yengo.js b/3p/vendors/yengo.js
index 7bfac2531aea..337d8b9a13c6 100644
--- a/3p/vendors/yengo.js
+++ b/3p/vendors/yengo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/yieldbot.js b/3p/vendors/yieldbot.js
index 992894b4da92..f6b626ea2b5f 100644
--- a/3p/vendors/yieldbot.js
+++ b/3p/vendors/yieldbot.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/yieldmo.js b/3p/vendors/yieldmo.js
index a7be27e77c7a..e7c50674355a 100644
--- a/3p/vendors/yieldmo.js
+++ b/3p/vendors/yieldmo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/yieldone.js b/3p/vendors/yieldone.js
index 6d2b49033c64..357bab22cff5 100644
--- a/3p/vendors/yieldone.js
+++ b/3p/vendors/yieldone.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/yieldpro.js b/3p/vendors/yieldpro.js
index 23f37545c49e..016d511a3a79 100644
--- a/3p/vendors/yieldpro.js
+++ b/3p/vendors/yieldpro.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/yotpo.js b/3p/vendors/yotpo.js
index 3c6ccbf6a590..2c792ad8a862 100644
--- a/3p/vendors/yotpo.js
+++ b/3p/vendors/yotpo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/zedo.js b/3p/vendors/zedo.js
index 5c0be05b8914..c73e96577306 100644
--- a/3p/vendors/zedo.js
+++ b/3p/vendors/zedo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/zen.js b/3p/vendors/zen.js
index 6ea84a43823b..b7667a58bd77 100644
--- a/3p/vendors/zen.js
+++ b/3p/vendors/zen.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/zergnet.js b/3p/vendors/zergnet.js
index 0420db334278..3384ef403539 100644
--- a/3p/vendors/zergnet.js
+++ b/3p/vendors/zergnet.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/vendors/zucks.js b/3p/vendors/zucks.js
index 0ded30c3666e..aae1c617720e 100644
--- a/3p/vendors/zucks.js
+++ b/3p/vendors/zucks.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // src/polyfills.js must be the first import.
 import '#3p/polyfills';
 
diff --git a/3p/viqeoplayer.js b/3p/viqeoplayer.js
index 91408351b8fc..f8673083a8c3 100644
--- a/3p/viqeoplayer.js
+++ b/3p/viqeoplayer.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {tryDecodeUriComponent} from '#core/types/string/url';
 
 import {loadScript} from './3p';
diff --git a/3p/yotpo.js b/3p/yotpo.js
index 83c45c67b188..f1325c15a3c5 100644
--- a/3p/yotpo.js
+++ b/3p/yotpo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript} from './3p';
 
 /**
diff --git a/ads/.eslintrc.js b/ads/.eslintrc.js
index c812dc83f9a8..c3e6c5d68971 100644
--- a/ads/.eslintrc.js
+++ b/ads/.eslintrc.js
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 module.exports = {
   'rules': {
diff --git a/ads/_a4a-config.js b/ads/_a4a-config.js
index 987563bf5bfb..9611f0d01f20 100644
--- a/ads/_a4a-config.js
+++ b/ads/_a4a-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {map} from '#core/types/object';
 
 /**
diff --git a/ads/_config.js b/ads/_config.js
index 5d2c6ec041e8..0c0cfb155354 100755
--- a/ads/_config.js
+++ b/ads/_config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {jsonConfiguration} from '#core/types/object/json';
 
 /**
diff --git a/ads/ads.extern.js b/ads/ads.extern.js
index 2f9b79b3f90b..b04f993191e4 100644
--- a/ads/ads.extern.js
+++ b/ads/ads.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 // HACK. Define application types used in default AMP externs
diff --git a/ads/alp/handler.js b/ads/alp/handler.js
index a03a9a01de53..467bcb53bddb 100644
--- a/ads/alp/handler.js
+++ b/ads/alp/handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   addParamToUrl,
   isLocalhostOrigin,
diff --git a/ads/alp/install-alp.js b/ads/alp/install-alp.js
index 7bed2cd9144c..4808d11481e0 100644
--- a/ads/alp/install-alp.js
+++ b/ads/alp/install-alp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Utility file that generates URLs suitable for AMP's impression tracking.
 
 import {initLogConstructor, setReportError} from '../../src/log';
diff --git a/ads/google/a4a/.eslintrc.js b/ads/google/a4a/.eslintrc.js
index af52b254cdac..0abcf33a2347 100644
--- a/ads/google/a4a/.eslintrc.js
+++ b/ads/google/a4a/.eslintrc.js
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 module.exports = {
   'rules': {
diff --git a/ads/google/a4a/experiment-utils.js b/ads/google/a4a/experiment-utils.js
index 5f1be06ef822..a6144e7a1ecb 100644
--- a/ads/google/a4a/experiment-utils.js
+++ b/ads/google/a4a/experiment-utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {addExperimentIdToElement} from './traffic-experiments';
 import {
   forceExperimentBranch,
diff --git a/ads/google/a4a/line-delimited-response-handler.js b/ads/google/a4a/line-delimited-response-handler.js
index c0a63db4fc17..07290e24466d 100644
--- a/ads/google/a4a/line-delimited-response-handler.js
+++ b/ads/google/a4a/line-delimited-response-handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {tryParseJson} from '#core/types/object/json';
 
 /**
diff --git a/ads/google/a4a/shared/content-recommendation.js b/ads/google/a4a/shared/content-recommendation.js
index b4eafb69312f..04d1d27f501e 100644
--- a/ads/google/a4a/shared/content-recommendation.js
+++ b/ads/google/a4a/shared/content-recommendation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview CoRe responsive functions that are shared with Google tag code.
  * This file must not depend on any AMP-specific libraries, e.g. log. If
diff --git a/ads/google/a4a/shared/test/test-content-recommendation.js b/ads/google/a4a/shared/test/test-content-recommendation.js
index ff9eee8f7ea6..3efabda21b0d 100644
--- a/ads/google/a4a/shared/test/test-content-recommendation.js
+++ b/ads/google/a4a/shared/test/test-content-recommendation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   LayoutType,
   getAutoConfig,
diff --git a/ads/google/a4a/shared/test/test-url-builder.js b/ads/google/a4a/shared/test/test-url-builder.js
index b259b82ea175..efcd570f7bd9 100644
--- a/ads/google/a4a/shared/test/test-url-builder.js
+++ b/ads/google/a4a/shared/test/test-url-builder.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {buildUrl} from '#ads/google/a4a/shared/url-builder';
 
 describes.sandboxed('buildUrl', {}, () => {
diff --git a/ads/google/a4a/shared/url-builder.js b/ads/google/a4a/shared/url-builder.js
index 95a8e7daef35..2cfc9663847c 100644
--- a/ads/google/a4a/shared/url-builder.js
+++ b/ads/google/a4a/shared/url-builder.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @typedef {{name: string, value: (string|number|null)}} */
 export let QueryParameterDef;
 
diff --git a/ads/google/a4a/test/test-line-delimited-response-handler.js b/ads/google/a4a/test/test-line-delimited-response-handler.js
index 2b4b267c031d..01db3e0d6774 100644
--- a/ads/google/a4a/test/test-line-delimited-response-handler.js
+++ b/ads/google/a4a/test/test-line-delimited-response-handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   lineDelimitedStreamer,
   metaJsonCreativeGrouper,
diff --git a/ads/google/a4a/test/test-traffic-experiments.js b/ads/google/a4a/test/test-traffic-experiments.js
index f2adc74c7172..09e80dd3398c 100644
--- a/ads/google/a4a/test/test-traffic-experiments.js
+++ b/ads/google/a4a/test/test-traffic-experiments.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   AMP_EXPERIMENT_ATTRIBUTE,
   EXPERIMENT_ATTRIBUTE,
diff --git a/ads/google/a4a/test/test-utils.js b/ads/google/a4a/test/test-utils.js
index be02ce6c1b82..548dcb4c4aa8 100644
--- a/ads/google/a4a/test/test-utils.js
+++ b/ads/google/a4a/test/test-utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 import '../../../../extensions/amp-ad/0.1/amp-ad-ui';
 import '../../../../extensions/amp-ad/0.1/amp-ad-xorigin-iframe-handler';
diff --git a/ads/google/a4a/traffic-experiments.js b/ads/google/a4a/traffic-experiments.js
index 20f70c104988..339a0a8dec04 100644
--- a/ads/google/a4a/traffic-experiments.js
+++ b/ads/google/a4a/traffic-experiments.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Machinery for doing "traffic-level" experiments.  That is, rather than
  * a single user choosing to opt-in to an experimental version of a module,
diff --git a/ads/google/a4a/utils.js b/ads/google/a4a/utils.js
index 77b641f3e815..7c7f7322468c 100644
--- a/ads/google/a4a/utils.js
+++ b/ads/google/a4a/utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CONSENT_POLICY_STATE} from '#core/constants/consent-state';
 import {DomFingerprint} from '#core/dom/fingerprint';
 import {GEO_IN_GROUP} from '../../../extensions/amp-geo/0.1/amp-geo-in-group';
diff --git a/ads/google/adsense.md b/ads/google/adsense.md
index a823bced8899..727c3fac57ae 100644
--- a/ads/google/adsense.md
+++ b/ads/google/adsense.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdSense
 
 ## Example
diff --git a/ads/google/doubleclick.js b/ads/google/doubleclick.js
index 17bf71a20c2e..29e94c30bb63 100644
--- a/ads/google/doubleclick.js
+++ b/ads/google/doubleclick.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {dev} from '../../src/log';
 
 const TAG = 'DOUBLECLICK - DEPRECATED';
diff --git a/ads/google/doubleclick.md b/ads/google/doubleclick.md
index 6d2dcf60e2ff..6e1bfc0272fe 100644
--- a/ads/google/doubleclick.md
+++ b/ads/google/doubleclick.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Google Ad Manager
 
 Support for Google Ad Manager Delayed Fetch has been deprecated as of March 29, 2018. Please upgrade to Fast Fetch. Visit the <a href="https://github.com/ampproject/amphtml/blob/main/extensions/amp-ad-network-doubleclick-impl/amp-ad-network-doubleclick-impl-internal.md">Google Ad Manager Fast Fetch documentation page</a> for more details.
diff --git a/ads/google/ima/ima-player-data.js b/ads/google/ima/ima-player-data.js
index 64e884740a66..f7f176b03964 100644
--- a/ads/google/ima/ima-player-data.js
+++ b/ads/google/ima/ima-player-data.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 export class ImaPlayerData {
   /**
    * Create a new ImaPlayerData object.
diff --git a/ads/google/ima/ima-video.js b/ads/google/ima/ima-video.js
index 1234fe4b0ea5..a9ebf55a1941 100644
--- a/ads/google/ima/ima-video.js
+++ b/ads/google/ima/ima-video.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CONSENT_POLICY_STATE} from '#core/constants/consent-state';
 import {ImaPlayerData} from './ima-player-data';
 import {camelCaseToTitleCase, setStyle, toggle} from '#core/dom/style';
diff --git a/ads/google/test/test-utils.js b/ads/google/test/test-utils.js
index 67484cfe9042..9cdd02f1cddf 100644
--- a/ads/google/test/test-utils.js
+++ b/ads/google/test/test-utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   ExternalCorePubVars,
   LayoutType,
diff --git a/ads/google/utils.js b/ads/google/utils.js
index 78c89ef29e5c..8be27c6d0645 100644
--- a/ads/google/utils.js
+++ b/ads/google/utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   ExternalCorePubVars,
   MIN_PUB_CONTROL_WIDTH_OF_DESKTOP,
diff --git a/ads/inabox/frame-overlay-helper.js b/ads/inabox/frame-overlay-helper.js
index fdb2bb0891e9..06fe2519a33b 100644
--- a/ads/inabox/frame-overlay-helper.js
+++ b/ads/inabox/frame-overlay-helper.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {
   LayoutRectDef,
   layoutRectFromDomRect,
diff --git a/ads/inabox/frame-overlay-manager.js b/ads/inabox/frame-overlay-manager.js
index d1f12a35c278..34c6ec348415 100644
--- a/ads/inabox/frame-overlay-manager.js
+++ b/ads/inabox/frame-overlay-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {collapseFrame, expandFrame} from './frame-overlay-helper';
 
 /** @const */
diff --git a/ads/inabox/full-overlay-frame-helper.js b/ads/inabox/full-overlay-frame-helper.js
index 2ae2e9f487aa..c346d65bf96e 100644
--- a/ads/inabox/full-overlay-frame-helper.js
+++ b/ads/inabox/full-overlay-frame-helper.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {px, resetStyles, setStyles, translate} from '#core/dom/style';
 
 /**
diff --git a/ads/inabox/inabox-host.js b/ads/inabox/inabox-host.js
index 4101425825ea..4aede9055786 100644
--- a/ads/inabox/inabox-host.js
+++ b/ads/inabox/inabox-host.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Inabox host script is installed on a non-AMP host page to provide APIs for
  * its embed AMP content (such as an ad created in AMP).
diff --git a/ads/inabox/inabox-host.md b/ads/inabox/inabox-host.md
index 616e8d17a716..bde4446c74c0 100644
--- a/ads/inabox/inabox-host.md
+++ b/ads/inabox/inabox-host.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # SDK integration for AMPHTML ads
 
 One goal of AMPHTML ads is for advertisers to create ad once and use
diff --git a/ads/inabox/inabox-messaging-host.js b/ads/inabox/inabox-messaging-host.js
index c26b59c8c70b..4d1fa97a12bf 100644
--- a/ads/inabox/inabox-messaging-host.js
+++ b/ads/inabox/inabox-messaging-host.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   MessageType,
   deserializeMessage,
diff --git a/ads/inabox/position-observer.js b/ads/inabox/position-observer.js
index f5104291987e..1a2d29fddf76 100644
--- a/ads/inabox/position-observer.js
+++ b/ads/inabox/position-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   LayoutRectDef,
   layoutRectFromDomRect,
diff --git a/ads/inabox/util.js b/ads/inabox/util.js
index daf2ebdd1c68..040eda7fc8f2 100644
--- a/ads/inabox/util.js
+++ b/ads/inabox/util.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Executes a "restricted" read/write vsync cycle.
  * This function exists mainly since the vsync service is not available for the
diff --git a/ads/vendors/1wo.js b/ads/vendors/1wo.js
index c1252c2f549d..94f44c1a18a0 100644
--- a/ads/vendors/1wo.js
+++ b/ads/vendors/1wo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/1wo.md b/ads/vendors/1wo.md
index 6d9168553352..a7e965a681f6 100644
--- a/ads/vendors/1wo.md
+++ b/ads/vendors/1wo.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # 1wo
 
 Provides support for [1wo](https://welcome.1worldonline.com/) widgets.
diff --git a/ads/vendors/24smi.js b/ads/vendors/24smi.js
index b997e5246cd8..d72749e726d1 100644
--- a/ads/vendors/24smi.js
+++ b/ads/vendors/24smi.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData, validateSrcPrefix} from '#3p/3p';
 
 const jsnPrefix = 'https://jsn.24smi.net/';
diff --git a/ads/vendors/24smi.md b/ads/vendors/24smi.md
index 5e5ea60b8c93..9a3a060fa143 100644
--- a/ads/vendors/24smi.md
+++ b/ads/vendors/24smi.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # 24smi
 
 Provides support for [24smi](https://partner.24smi.info/) widgets.
diff --git a/ads/vendors/_fakedelayed_.js b/ads/vendors/_fakedelayed_.js
index b7a49f387cc3..5f064bc549fe 100644
--- a/ads/vendors/_fakedelayed_.js
+++ b/ads/vendors/_fakedelayed_.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {setStyles} from '#core/dom/style';
 import {validateData, writeScript} from '#3p/3p';
 
diff --git a/ads/vendors/_fakedelayed_.md b/ads/vendors/_fakedelayed_.md
index 9f96f17f49ae..7112b54ecfd2 100644
--- a/ads/vendors/_fakedelayed_.md
+++ b/ads/vendors/_fakedelayed_.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # fake-delayed
 
 A fake ad type that is used for local development and testing.
diff --git a/ads/vendors/_ping_.js b/ads/vendors/_ping_.js
index df5a570c6514..66f3b9a1cb99 100644
--- a/ads/vendors/_ping_.js
+++ b/ads/vendors/_ping_.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dev, devAssert, userAssert} from '../../src/log';
 import {validateData} from '#3p/3p';
 
diff --git a/ads/vendors/_ping_.md b/ads/vendors/_ping_.md
index 6e823d3a7372..96d299c5be41 100644
--- a/ads/vendors/_ping_.md
+++ b/ads/vendors/_ping_.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # \_PING\_
 
 A fake ad type that is only used for local development.
diff --git a/ads/vendors/a8.js b/ads/vendors/a8.js
index 815e4703f590..d22672ddb6be 100644
--- a/ads/vendors/a8.js
+++ b/ads/vendors/a8.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/a8.md b/ads/vendors/a8.md
index e62312d4d879..e65bfb95d862 100644
--- a/ads/vendors/a8.md
+++ b/ads/vendors/a8.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # A8net
 
 Serves ads from [a8.net](https://www.a8.net/).
diff --git a/ads/vendors/a9.js b/ads/vendors/a9.js
index 14b060efd8ae..042e784abe0c 100644
--- a/ads/vendors/a9.js
+++ b/ads/vendors/a9.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {hasOwn} from '#core/types/object';
 import {loadScript, validateData, writeScript} from '#3p/3p';
 import {parseJson} from '#core/types/object/json';
diff --git a/ads/vendors/a9.md b/ads/vendors/a9.md
index 74a8a33fcdc2..a2f45fefe345 100644
--- a/ads/vendors/a9.md
+++ b/ads/vendors/a9.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # A9
 
 The A9 amp ad unit supports the Search, Recommendation and Custom ad widgets of the Native Shopping Ads program. These widgets would need to be created here first `https://affiliate-program.amazon.com/home/ads`
diff --git a/ads/vendors/accesstrade.js b/ads/vendors/accesstrade.js
index 8af1aafc7c65..3ca650fa747f 100644
--- a/ads/vendors/accesstrade.js
+++ b/ads/vendors/accesstrade.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/accesstrade.md b/ads/vendors/accesstrade.md
index c6356f47fdbf..b328b4c9fa23 100644
--- a/ads/vendors/accesstrade.md
+++ b/ads/vendors/accesstrade.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AccessTrade
 
 ## Example
diff --git a/ads/vendors/adagio.js b/ads/vendors/adagio.js
index f8f7783969d5..5f940035fc46 100755
--- a/ads/vendors/adagio.js
+++ b/ads/vendors/adagio.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adagio.md b/ads/vendors/adagio.md
index 360d1ce4e9ba..992a7e716ad3 100755
--- a/ads/vendors/adagio.md
+++ b/ads/vendors/adagio.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Ad.Agio - Neodata Group
 
 ## Example
diff --git a/ads/vendors/adblade.js b/ads/vendors/adblade.js
index 117618b0bdf9..7fec2feeb7b1 100644
--- a/ads/vendors/adblade.js
+++ b/ads/vendors/adblade.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 const adbladeFields = ['width', 'height', 'cid'];
diff --git a/ads/vendors/adblade.md b/ads/vendors/adblade.md
index 620f791e9780..ca6caeb76112 100644
--- a/ads/vendors/adblade.md
+++ b/ads/vendors/adblade.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Adblade
 
 ## Example
diff --git a/ads/vendors/adbutler.js b/ads/vendors/adbutler.js
index 61f8e243784c..e4a011d845a3 100644
--- a/ads/vendors/adbutler.js
+++ b/ads/vendors/adbutler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adbutler.md b/ads/vendors/adbutler.md
index 777e20b2d9f5..a6bb33ddf136 100644
--- a/ads/vendors/adbutler.md
+++ b/ads/vendors/adbutler.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdButler
 
 Serves ads from [AdButler](https://www.adbutler.com/).
diff --git a/ads/vendors/adform.js b/ads/vendors/adform.js
index 74847fad3c52..525022e85857 100644
--- a/ads/vendors/adform.js
+++ b/ads/vendors/adform.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, validateSrcPrefix, writeScript} from '#3p/3p';
 
 // Valid adform ad source hosts
diff --git a/ads/vendors/adform.md b/ads/vendors/adform.md
index 70d82a8a1e18..d5ab911c545c 100644
--- a/ads/vendors/adform.md
+++ b/ads/vendors/adform.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Adform
 
 ## Examples
diff --git a/ads/vendors/adfox.js b/ads/vendors/adfox.js
index f0e95622c4d0..621e70eee3e9 100644
--- a/ads/vendors/adfox.js
+++ b/ads/vendors/adfox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 import {yandex} from './yandex';
 
diff --git a/ads/vendors/adfox.md b/ads/vendors/adfox.md
index 46397e1f70e2..be36f747c42d 100644
--- a/ads/vendors/adfox.md
+++ b/ads/vendors/adfox.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdFox
 
 ## Example
diff --git a/ads/vendors/adgeneration.js b/ads/vendors/adgeneration.js
index d37b7df6d149..99c13b6833b3 100644
--- a/ads/vendors/adgeneration.js
+++ b/ads/vendors/adgeneration.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adgeneration.md b/ads/vendors/adgeneration.md
index be67717dbec1..827b08f6d2f8 100644
--- a/ads/vendors/adgeneration.md
+++ b/ads/vendors/adgeneration.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Ad Generation
 
 ## Example
diff --git a/ads/vendors/adglare.js b/ads/vendors/adglare.js
index 7b8c9a1d2abc..71a9184b7872 100644
--- a/ads/vendors/adglare.js
+++ b/ads/vendors/adglare.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adglare.md b/ads/vendors/adglare.md
index 1ad848ac4f6f..3fc686647d1f 100644
--- a/ads/vendors/adglare.md
+++ b/ads/vendors/adglare.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdGlare
 
 ## Example
diff --git a/ads/vendors/adhese.js b/ads/vendors/adhese.js
index 0a273478e0a2..a07d78311d07 100644
--- a/ads/vendors/adhese.js
+++ b/ads/vendors/adhese.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adhese.md b/ads/vendors/adhese.md
index d59fcafaa45e..2378c78afe60 100644
--- a/ads/vendors/adhese.md
+++ b/ads/vendors/adhese.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Adhese
 
 Serves ads from [Adhese](https://www.adhese.com).
diff --git a/ads/vendors/adincube.js b/ads/vendors/adincube.js
index 314032fc59bc..dba5a35322b1 100644
--- a/ads/vendors/adincube.js
+++ b/ads/vendors/adincube.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {hasOwn} from '#core/types/object';
 import {loadScript, validateData} from '#3p/3p';
 
diff --git a/ads/vendors/adincube.md b/ads/vendors/adincube.md
index 23b7f2976d13..22b70ef46e86 100644
--- a/ads/vendors/adincube.md
+++ b/ads/vendors/adincube.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdinCube
 
 Visit [dashboard.adincube.com](https://dashboard.adincube.com/dashboard) to create a publisher account and get access to our AMP ads.
diff --git a/ads/vendors/adition.js b/ads/vendors/adition.js
index 3e743d453210..763105137afc 100644
--- a/ads/vendors/adition.js
+++ b/ads/vendors/adition.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adition.md b/ads/vendors/adition.md
index c2dcdd353534..cc8e709c0f3e 100644
--- a/ads/vendors/adition.md
+++ b/ads/vendors/adition.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # ADITION technologies AG
 
 ADITION technologies AG specializes in the development and distribution of its own ad server technology, which is called ADITION ad serving. The ADITION ad server now supports AMP.
diff --git a/ads/vendors/adman.js b/ads/vendors/adman.js
index 56e208f01ab4..aecdb8258840 100644
--- a/ads/vendors/adman.js
+++ b/ads/vendors/adman.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adman.md b/ads/vendors/adman.md
index 29cd5f818ea0..d0bb9e43dd5d 100644
--- a/ads/vendors/adman.md
+++ b/ads/vendors/adman.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Adman
 
 ## Example
diff --git a/ads/vendors/admanmedia.js b/ads/vendors/admanmedia.js
index 649199f2abf1..19060c4a3fdc 100644
--- a/ads/vendors/admanmedia.js
+++ b/ads/vendors/admanmedia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/admanmedia.md b/ads/vendors/admanmedia.md
index 903b6ce18196..291e1315c2e6 100644
--- a/ads/vendors/admanmedia.md
+++ b/ads/vendors/admanmedia.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Admanmedia
 
 Please visit [www.admanmedia.com](http://www.admanmedia.com) for more details.
diff --git a/ads/vendors/admixer.js b/ads/vendors/admixer.js
index e4c53decfdef..806fa858becb 100644
--- a/ads/vendors/admixer.js
+++ b/ads/vendors/admixer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {tryParseJson} from '#core/types/object/json';
 import {validateData, writeScript} from '#3p/3p';
 
diff --git a/ads/vendors/admixer.md b/ads/vendors/admixer.md
index 0211a527ba42..66fcd3b7e2a5 100644
--- a/ads/vendors/admixer.md
+++ b/ads/vendors/admixer.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Admixer
 
 ## Example
diff --git a/ads/vendors/adnuntius.js b/ads/vendors/adnuntius.js
index 8f4163dc5e91..0304293ee621 100644
--- a/ads/vendors/adnuntius.js
+++ b/ads/vendors/adnuntius.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adnuntius.md b/ads/vendors/adnuntius.md
index b5e57a2dd837..a2d00113f1c7 100644
--- a/ads/vendors/adnuntius.md
+++ b/ads/vendors/adnuntius.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Adnuntius
 
 Adnuntius provides a wide array of features alongside their AMP integration.
diff --git a/ads/vendors/adocean.js b/ads/vendors/adocean.js
index ac2079167db2..d03716cad8b8 100644
--- a/ads/vendors/adocean.js
+++ b/ads/vendors/adocean.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CONSENT_POLICY_STATE} from '#core/constants/consent-state';
 import {computeInMasterFrame, validateData, writeScript} from '#3p/3p';
 import {parseJson} from '#core/types/object/json';
diff --git a/ads/vendors/adocean.md b/ads/vendors/adocean.md
index cde6a61ff77d..4a0ee0bf573a 100644
--- a/ads/vendors/adocean.md
+++ b/ads/vendors/adocean.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdOcean
 
 ## Example
diff --git a/ads/vendors/adop.js b/ads/vendors/adop.js
index b0ce6106c619..d95e62e8e84f 100755
--- a/ads/vendors/adop.js
+++ b/ads/vendors/adop.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adop.md b/ads/vendors/adop.md
index 5f5b81b3fe63..e1d68eb5e658 100755
--- a/ads/vendors/adop.md
+++ b/ads/vendors/adop.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Adop
 
 ## Example
diff --git a/ads/vendors/adpicker.js b/ads/vendors/adpicker.js
index 7e645345f777..5907157cdfe3 100644
--- a/ads/vendors/adpicker.js
+++ b/ads/vendors/adpicker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adplugg.js b/ads/vendors/adplugg.js
index ad98b5cb0fec..d0fb9d2f4117 100644
--- a/ads/vendors/adplugg.js
+++ b/ads/vendors/adplugg.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {hasOwn} from '#core/types/object';
 import {loadScript, validateData} from '#3p/3p';
 
diff --git a/ads/vendors/adplugg.md b/ads/vendors/adplugg.md
index f23e937c46f2..94601728b436 100644
--- a/ads/vendors/adplugg.md
+++ b/ads/vendors/adplugg.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdPlugg
 
 ## Example
diff --git a/ads/vendors/adpon.js b/ads/vendors/adpon.js
index de4c5bc8ce90..988b917d694d 100644
--- a/ads/vendors/adpon.js
+++ b/ads/vendors/adpon.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adpon.md b/ads/vendors/adpon.md
index 35089bde34c3..263f99113f34 100644
--- a/ads/vendors/adpon.md
+++ b/ads/vendors/adpon.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Adpon
 
 ## Example
diff --git a/ads/vendors/adpushup.js b/ads/vendors/adpushup.js
index baa945754f04..e2289e8660c7 100644
--- a/ads/vendors/adpushup.js
+++ b/ads/vendors/adpushup.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adreactor.js b/ads/vendors/adreactor.js
index 97cbb4c0cd93..aa7d7c75dab2 100644
--- a/ads/vendors/adreactor.js
+++ b/ads/vendors/adreactor.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adreactor.md b/ads/vendors/adreactor.md
index 54ba981a68ad..f608c4dd61b3 100644
--- a/ads/vendors/adreactor.md
+++ b/ads/vendors/adreactor.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdReactor
 
 ## Example
diff --git a/ads/vendors/adsensor.js b/ads/vendors/adsensor.js
index a19de0b02ce2..6b2e3e8bb2f1 100644
--- a/ads/vendors/adsensor.js
+++ b/ads/vendors/adsensor.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adsensor.md b/ads/vendors/adsensor.md
index 1d2812d2f8be..430bc7a3529e 100644
--- a/ads/vendors/adsensor.md
+++ b/ads/vendors/adsensor.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdSensor
 
 ## Example
diff --git a/ads/vendors/adservsolutions.js b/ads/vendors/adservsolutions.js
index d0708ab00e53..f5ae6c5e4372 100644
--- a/ads/vendors/adservsolutions.js
+++ b/ads/vendors/adservsolutions.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adservsolutions.md b/ads/vendors/adservsolutions.md
index 0fc2459a4794..ca47b629739c 100644
--- a/ads/vendors/adservsolutions.md
+++ b/ads/vendors/adservsolutions.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdServSolution
 
 ## Example
diff --git a/ads/vendors/adsloom.js b/ads/vendors/adsloom.js
index 599c3f1c0d01..451f63f2f266 100644
--- a/ads/vendors/adsloom.js
+++ b/ads/vendors/adsloom.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adsloom.md b/ads/vendors/adsloom.md
index 81461bcd1241..1025d62f3af3 100644
--- a/ads/vendors/adsloom.md
+++ b/ads/vendors/adsloom.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdsLoom
 
 ## Example of AdsLoom's widget implementation
diff --git a/ads/vendors/adsnative.js b/ads/vendors/adsnative.js
index 3a603ac54ab2..e4843bbf8c16 100644
--- a/ads/vendors/adsnative.js
+++ b/ads/vendors/adsnative.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adsnative.md b/ads/vendors/adsnative.md
index 164d02e19a91..bb07598f837b 100644
--- a/ads/vendors/adsnative.md
+++ b/ads/vendors/adsnative.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdsNative
 
 ## Example
diff --git a/ads/vendors/adspeed.js b/ads/vendors/adspeed.js
index 0886cb9e94e0..a84f73db9404 100644
--- a/ads/vendors/adspeed.js
+++ b/ads/vendors/adspeed.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adspeed.md b/ads/vendors/adspeed.md
index c3c72ee6f4ac..915552b5f91c 100644
--- a/ads/vendors/adspeed.md
+++ b/ads/vendors/adspeed.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdSpeed
 
 ## Example
diff --git a/ads/vendors/adspirit.js b/ads/vendors/adspirit.js
index 3225b2adadf1..f946aa47aecc 100644
--- a/ads/vendors/adspirit.js
+++ b/ads/vendors/adspirit.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {setStyles} from '#core/dom/style';
 import {validateData} from '#3p/3p';
 
diff --git a/ads/vendors/adspirit.md b/ads/vendors/adspirit.md
index 9eedea6b642d..24066ee5900e 100644
--- a/ads/vendors/adspirit.md
+++ b/ads/vendors/adspirit.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdSpirit
 
 ## Example
diff --git a/ads/vendors/adstir.js b/ads/vendors/adstir.js
index 1da7cd9bb51b..be868ba8da3f 100644
--- a/ads/vendors/adstir.js
+++ b/ads/vendors/adstir.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adstir.md b/ads/vendors/adstir.md
index 7695ea32bf45..1c518ad18b52 100644
--- a/ads/vendors/adstir.md
+++ b/ads/vendors/adstir.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdStir
 
 ## Example
diff --git a/ads/vendors/adstyle.js b/ads/vendors/adstyle.js
index 2e1d027bd9c4..566e7bc43c7b 100644
--- a/ads/vendors/adstyle.js
+++ b/ads/vendors/adstyle.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adstyle.md b/ads/vendors/adstyle.md
index 20b2c23dd187..30d64c9f9413 100644
--- a/ads/vendors/adstyle.md
+++ b/ads/vendors/adstyle.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdStyle
 
 ## Example
diff --git a/ads/vendors/adtech.js b/ads/vendors/adtech.js
index 201e22967c63..e1bfc74a98dc 100644
--- a/ads/vendors/adtech.js
+++ b/ads/vendors/adtech.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   validateData,
   validateSrcContains,
diff --git a/ads/vendors/adtech.md b/ads/vendors/adtech.md
index c081bd43e4f3..ecae6c45ca17 100644
--- a/ads/vendors/adtech.md
+++ b/ads/vendors/adtech.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdTech
 
 ## Example
diff --git a/ads/vendors/adtelligent.js b/ads/vendors/adtelligent.js
index f4e05eae0ee8..36c94493da8a 100644
--- a/ads/vendors/adtelligent.js
+++ b/ads/vendors/adtelligent.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adtelligent.md b/ads/vendors/adtelligent.md
index 8ecae7dca186..6d921e0c32c1 100644
--- a/ads/vendors/adtelligent.md
+++ b/ads/vendors/adtelligent.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Adtelligent
 
 ## Examples
diff --git a/ads/vendors/adthrive.js b/ads/vendors/adthrive.js
index 2335360486da..39dfe2c5a4f9 100644
--- a/ads/vendors/adthrive.js
+++ b/ads/vendors/adthrive.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adthrive.md b/ads/vendors/adthrive.md
index b43d2e116b87..e31788d5a07a 100644
--- a/ads/vendors/adthrive.md
+++ b/ads/vendors/adthrive.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdThrive
 
 Your site must be approved and active with [AdThrive](http://www.adthrive.com) prior to use. AdThrive will install or provide specific tags for your site.
diff --git a/ads/vendors/adunity.js b/ads/vendors/adunity.js
index db90bea9a263..a17cdbe0484c 100644
--- a/ads/vendors/adunity.js
+++ b/ads/vendors/adunity.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adunity.md b/ads/vendors/adunity.md
index dac5b2f36f67..01c51b25ee14 100644
--- a/ads/vendors/adunity.md
+++ b/ads/vendors/adunity.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdUnity
 
 ## Example
diff --git a/ads/vendors/aduptech.js b/ads/vendors/aduptech.js
index 99ea1ec3191d..f6103cbc33b4 100644
--- a/ads/vendors/aduptech.js
+++ b/ads/vendors/aduptech.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/aduptech.md b/ads/vendors/aduptech.md
index 4ca6bce6e1d8..bb04d2b60c59 100644
--- a/ads/vendors/aduptech.md
+++ b/ads/vendors/aduptech.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdUp Technology
 
 Please visit [www.adup-tech.com](http://www.adup-tech.com) for more information and sign up as publisher to create your placement.
diff --git a/ads/vendors/adventive.js b/ads/vendors/adventive.js
index fc30195a5db3..76cf4df6bc41 100644
--- a/ads/vendors/adventive.js
+++ b/ads/vendors/adventive.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {addParamsToUrl} from '../../src/url';
 import {dict, hasOwn} from '#core/types/object';
 import {endsWith} from '#core/types/string';
diff --git a/ads/vendors/adventive.md b/ads/vendors/adventive.md
index 8ea2b265a114..8c1ac0b6dee0 100644
--- a/ads/vendors/adventive.md
+++ b/ads/vendors/adventive.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Adventive
 
 ## Example
diff --git a/ads/vendors/adverline.js b/ads/vendors/adverline.js
index eae0b66b8cd5..29dd6e0600a8 100644
--- a/ads/vendors/adverline.js
+++ b/ads/vendors/adverline.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adverline.md b/ads/vendors/adverline.md
index c6862f695125..e41164501755 100644
--- a/ads/vendors/adverline.md
+++ b/ads/vendors/adverline.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Adverline
 
 ## Examples
diff --git a/ads/vendors/adverticum.js b/ads/vendors/adverticum.js
index c33330454205..0ac494ef6ace 100644
--- a/ads/vendors/adverticum.js
+++ b/ads/vendors/adverticum.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {setStyle} from '#core/dom/style';
 import {validateData, writeScript} from '#3p/3p';
 /**
diff --git a/ads/vendors/adverticum.md b/ads/vendors/adverticum.md
index 6d795b56d3b1..567c027dad32 100644
--- a/ads/vendors/adverticum.md
+++ b/ads/vendors/adverticum.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Adverticum
 
 ## Example
diff --git a/ads/vendors/advertserve.js b/ads/vendors/advertserve.js
index 7b61de4fdb1c..18e96f0d3deb 100644
--- a/ads/vendors/advertserve.js
+++ b/ads/vendors/advertserve.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/advertserve.md b/ads/vendors/advertserve.md
index 87520f638380..1520d49224d1 100644
--- a/ads/vendors/advertserve.md
+++ b/ads/vendors/advertserve.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AdvertServe
 
 ## Example
diff --git a/ads/vendors/adyoulike.js b/ads/vendors/adyoulike.js
index 0cb414d74bd9..b2990183ba5b 100644
--- a/ads/vendors/adyoulike.js
+++ b/ads/vendors/adyoulike.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/adyoulike.md b/ads/vendors/adyoulike.md
index 2967a7abcfc7..7d875349eb62 100644
--- a/ads/vendors/adyoulike.md
+++ b/ads/vendors/adyoulike.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Adyoulike
 
 Serves ads from [Adyoulike](https://www.adyoulike.com/).
diff --git a/ads/vendors/affiliateb.js b/ads/vendors/affiliateb.js
index 113b5af5efe8..bcbee5d96430 100644
--- a/ads/vendors/affiliateb.js
+++ b/ads/vendors/affiliateb.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/affiliateb.md b/ads/vendors/affiliateb.md
index c435ceeaab27..b43f3f41d930 100644
--- a/ads/vendors/affiliateb.md
+++ b/ads/vendors/affiliateb.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AffiliateB
 
 ## Example
diff --git a/ads/vendors/aja.js b/ads/vendors/aja.js
index 955ee8633089..70f890bf59bd 100644
--- a/ads/vendors/aja.js
+++ b/ads/vendors/aja.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/aja.md b/ads/vendors/aja.md
index 0806b7e36c50..10b37a23457f 100644
--- a/ads/vendors/aja.md
+++ b/ads/vendors/aja.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AJA
 
 The AJA Ads for AMP supports Banner, Native, Video, and Recommendation Widget.
diff --git a/ads/vendors/amoad.js b/ads/vendors/amoad.js
index a05f3a745fdf..8dbf0b1d6a9a 100644
--- a/ads/vendors/amoad.js
+++ b/ads/vendors/amoad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/amoad.md b/ads/vendors/amoad.md
index 7364f29e0b1f..8072dadcc904 100644
--- a/ads/vendors/amoad.md
+++ b/ads/vendors/amoad.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMoAd
 
 ## Examples
diff --git a/ads/vendors/aniview.js b/ads/vendors/aniview.js
index 50053712d2f5..a0aa665a0c12 100644
--- a/ads/vendors/aniview.js
+++ b/ads/vendors/aniview.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/aniview.md b/ads/vendors/aniview.md
index f50f2c009dd8..8208e53a67eb 100644
--- a/ads/vendors/aniview.md
+++ b/ads/vendors/aniview.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Aniview
 
 ## Example
diff --git a/ads/vendors/anyclip.js b/ads/vendors/anyclip.js
index e94050f858e9..11aed4ca82b6 100644
--- a/ads/vendors/anyclip.js
+++ b/ads/vendors/anyclip.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 const requiredParams = ['pubname', 'widgetname'];
diff --git a/ads/vendors/anyclip.md b/ads/vendors/anyclip.md
index 362331d2aa9f..c443fc9606a7 100644
--- a/ads/vendors/anyclip.md
+++ b/ads/vendors/anyclip.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AnyClip
 
 ## Example
diff --git a/ads/vendors/appnexus.js b/ads/vendors/appnexus.js
index f880f7ac8984..c7381dd2a1a7 100644
--- a/ads/vendors/appnexus.js
+++ b/ads/vendors/appnexus.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData, writeScript} from '#3p/3p';
 import {setStyles} from '#core/dom/style';
 
diff --git a/ads/vendors/appnexus.md b/ads/vendors/appnexus.md
index 289b3de4053d..643656f9efae 100644
--- a/ads/vendors/appnexus.md
+++ b/ads/vendors/appnexus.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AppNexus
 
 ## Examples
diff --git a/ads/vendors/appvador.js b/ads/vendors/appvador.js
index 8c75436172e3..7d390f87f3be 100644
--- a/ads/vendors/appvador.js
+++ b/ads/vendors/appvador.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/appvador.md b/ads/vendors/appvador.md
index efa942b76d57..fd3f69d0c17f 100644
--- a/ads/vendors/appvador.md
+++ b/ads/vendors/appvador.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AppVador
 
 ## Example
diff --git a/ads/vendors/atomx.js b/ads/vendors/atomx.js
index ba87340c5b01..70359d219ad4 100644
--- a/ads/vendors/atomx.js
+++ b/ads/vendors/atomx.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/atomx.md b/ads/vendors/atomx.md
index d043ec68efb4..53e32ea00bb7 100644
--- a/ads/vendors/atomx.md
+++ b/ads/vendors/atomx.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Atomx
 
 ## Example
diff --git a/ads/vendors/baidu.js b/ads/vendors/baidu.js
index 9a1a7f9e3486..5d3e10076908 100644
--- a/ads/vendors/baidu.js
+++ b/ads/vendors/baidu.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/baidu.md b/ads/vendors/baidu.md
index ea3459bdb4a1..1b90fe887e3d 100644
--- a/ads/vendors/baidu.md
+++ b/ads/vendors/baidu.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Baidu
 
 ## Example
diff --git a/ads/vendors/beaverads.js b/ads/vendors/beaverads.js
index 0a76b6c56c7f..3e021c14e9d0 100644
--- a/ads/vendors/beaverads.js
+++ b/ads/vendors/beaverads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/bidtellect.js b/ads/vendors/bidtellect.js
index b84acd137acf..30343b918c65 100644
--- a/ads/vendors/bidtellect.js
+++ b/ads/vendors/bidtellect.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/bidtellect.md b/ads/vendors/bidtellect.md
index fe011bdd8f3a..fea397583998 100644
--- a/ads/vendors/bidtellect.md
+++ b/ads/vendors/bidtellect.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Bidtellect
 
 ## Example
diff --git a/ads/vendors/blade.js b/ads/vendors/blade.js
index b537766f459f..95d93bcde9e6 100644
--- a/ads/vendors/blade.js
+++ b/ads/vendors/blade.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 import {tryParseJson} from '#core/types/object/json';
 
diff --git a/ads/vendors/blade.md b/ads/vendors/blade.md
index 95d724f62278..977a82603782 100644
--- a/ads/vendors/blade.md
+++ b/ads/vendors/blade.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Blade
 
 ## Example
diff --git a/ads/vendors/brainy.js b/ads/vendors/brainy.js
index 9754d2d3e8f5..203553069448 100644
--- a/ads/vendors/brainy.js
+++ b/ads/vendors/brainy.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/brainy.md b/ads/vendors/brainy.md
index 5718975e3592..10aa8a6abac9 100644
--- a/ads/vendors/brainy.md
+++ b/ads/vendors/brainy.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # brainy
 
 ## Example
diff --git a/ads/vendors/bringhub.js b/ads/vendors/bringhub.js
index 50e3a9d706b7..cfa7d4319644 100644
--- a/ads/vendors/bringhub.js
+++ b/ads/vendors/bringhub.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/bringhub.md b/ads/vendors/bringhub.md
index 66be2e3ba094..914a98b941d4 100644
--- a/ads/vendors/bringhub.md
+++ b/ads/vendors/bringhub.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Bringhub
 
 ## Example installation of the Bringhub Mini-Storefront
diff --git a/ads/vendors/broadstreetads.js b/ads/vendors/broadstreetads.js
index bfce63d180b8..124888600355 100644
--- a/ads/vendors/broadstreetads.js
+++ b/ads/vendors/broadstreetads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/broadstreetads.md b/ads/vendors/broadstreetads.md
index fb407399eaac..00898fb4764c 100644
--- a/ads/vendors/broadstreetads.md
+++ b/ads/vendors/broadstreetads.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Broadstreet Ads
 
 ## Example
diff --git a/ads/vendors/byplay.js b/ads/vendors/byplay.js
index 638d780c636f..19d9691adbbc 100644
--- a/ads/vendors/byplay.js
+++ b/ads/vendors/byplay.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/byplay.md b/ads/vendors/byplay.md
index 3885bd16c1d8..a21d6ad37226 100644
--- a/ads/vendors/byplay.md
+++ b/ads/vendors/byplay.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # ByPlay
 
 ## Example
diff --git a/ads/vendors/caajainfeed.md b/ads/vendors/caajainfeed.md
index 796c9a8d1fbf..9a9725b24b80 100644
--- a/ads/vendors/caajainfeed.md
+++ b/ads/vendors/caajainfeed.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # CA A.J.A. Infeed
 
 ## Example
diff --git a/ads/vendors/capirs.js b/ads/vendors/capirs.js
index c760ac60a6e9..44734da1b9d6 100644
--- a/ads/vendors/capirs.js
+++ b/ads/vendors/capirs.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/capirs.md b/ads/vendors/capirs.md
index 09772b2770ac..f2f9d41105a6 100644
--- a/ads/vendors/capirs.md
+++ b/ads/vendors/capirs.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Rambler&Co
 
 ## Example
diff --git a/ads/vendors/caprofitx.js b/ads/vendors/caprofitx.js
index 146689d34b69..8318611a438a 100644
--- a/ads/vendors/caprofitx.js
+++ b/ads/vendors/caprofitx.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/caprofitx.md b/ads/vendors/caprofitx.md
index 0db97cfbc4df..cb62f52e491d 100644
--- a/ads/vendors/caprofitx.md
+++ b/ads/vendors/caprofitx.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # CA ProFit-X
 
 ## Examples
diff --git a/ads/vendors/cedato.js b/ads/vendors/cedato.js
index a5cbbb045a4b..fe1129214390 100644
--- a/ads/vendors/cedato.js
+++ b/ads/vendors/cedato.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseUrlDeprecated} from '../../src/url';
 import {setStyles} from '#core/dom/style';
 import {validateData} from '#3p/3p';
diff --git a/ads/vendors/cedato.md b/ads/vendors/cedato.md
index 844d78b50a3c..37f4ed137a6a 100644
--- a/ads/vendors/cedato.md
+++ b/ads/vendors/cedato.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Cedato
 
 ## Example
diff --git a/ads/vendors/colombia.js b/ads/vendors/colombia.js
index 70f601b3dfcf..99585708a9a7 100644
--- a/ads/vendors/colombia.js
+++ b/ads/vendors/colombia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/colombia.md b/ads/vendors/colombia.md
index 26c53cc0e7e8..60da75029731 100644
--- a/ads/vendors/colombia.md
+++ b/ads/vendors/colombia.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Colombia
 
 ## Example
diff --git a/ads/vendors/conative.js b/ads/vendors/conative.js
index 2b85576f5888..061290ef9071 100644
--- a/ads/vendors/conative.js
+++ b/ads/vendors/conative.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/conative.md b/ads/vendors/conative.md
index 020bc4cb3ba2..e9f7774af836 100644
--- a/ads/vendors/conative.md
+++ b/ads/vendors/conative.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # CONATIVE
 
 CONATIVE support for AMP.
diff --git a/ads/vendors/connatix.js b/ads/vendors/connatix.js
index ae77ecbdea93..0a4a2781581a 100644
--- a/ads/vendors/connatix.js
+++ b/ads/vendors/connatix.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {hasOwn} from '#core/types/object';
 import {tryParseJson} from '#core/types/object/json';
 import {validateData} from '#3p/3p';
diff --git a/ads/vendors/connatix.md b/ads/vendors/connatix.md
index 9154452bef97..de635f91e395 100644
--- a/ads/vendors/connatix.md
+++ b/ads/vendors/connatix.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Connatix
 
 ## Example
diff --git a/ads/vendors/contentad.js b/ads/vendors/contentad.js
index 93a2474afe96..3fc3d0cbb92a 100644
--- a/ads/vendors/contentad.js
+++ b/ads/vendors/contentad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseUrlDeprecated} from '../../src/url';
 import {validateData, writeScript} from '#3p/3p';
 
diff --git a/ads/vendors/contentad.md b/ads/vendors/contentad.md
index 600ce7b96eba..86a9a876ff37 100644
--- a/ads/vendors/contentad.md
+++ b/ads/vendors/contentad.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Content.ad Inline Ad
 
 ## Example
diff --git a/ads/vendors/criteo.js b/ads/vendors/criteo.js
index 782395827e2b..d65645e8dc8d 100644
--- a/ads/vendors/criteo.js
+++ b/ads/vendors/criteo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dev} from '../../src/log';
 import {loadScript} from '#3p/3p';
 
diff --git a/ads/vendors/criteo.md b/ads/vendors/criteo.md
index 20a152e85548..5e81c488b242 100644
--- a/ads/vendors/criteo.md
+++ b/ads/vendors/criteo.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Criteo
 
 Criteo support for AMP covers Passback technologies.
diff --git a/ads/vendors/csa.js b/ads/vendors/csa.js
index df4dd3d8ec15..1e62a3024a65 100644
--- a/ads/vendors/csa.js
+++ b/ads/vendors/csa.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {devAssert} from '../../src/log';
 import {getStyle, setStyle, setStyles} from '#core/dom/style';
 import {loadScript, validateData} from '#3p/3p';
diff --git a/ads/vendors/csa.md b/ads/vendors/csa.md
index 50f8c2adac04..6596609e11d2 100644
--- a/ads/vendors/csa.md
+++ b/ads/vendors/csa.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Custom Search Ads
 
 ## AdSense For Search (AFS)
diff --git a/ads/vendors/custom.md b/ads/vendors/custom.md
index 2c9e7157d24b..305e59552df0 100644
--- a/ads/vendors/custom.md
+++ b/ads/vendors/custom.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Custom (experimental)
 
 Custom does not represent a specific network. Rather, it provides a way for
diff --git a/ads/vendors/dable.js b/ads/vendors/dable.js
index 4c4142b7f57a..dd2251142f42 100644
--- a/ads/vendors/dable.js
+++ b/ads/vendors/dable.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/dable.md b/ads/vendors/dable.md
index 0fc7b090ea5b..83216aa55f66 100644
--- a/ads/vendors/dable.md
+++ b/ads/vendors/dable.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Dable
 
 ## Example
diff --git a/ads/vendors/digiteka.js b/ads/vendors/digiteka.js
index 800f732890d7..283ea1940357 100644
--- a/ads/vendors/digiteka.js
+++ b/ads/vendors/digiteka.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/digiteka.md b/ads/vendors/digiteka.md
index bfad4c5d1fa2..377e4f0aea9f 100644
--- a/ads/vendors/digiteka.md
+++ b/ads/vendors/digiteka.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Digiteka
 
 ## Example
diff --git a/ads/vendors/directadvert.js b/ads/vendors/directadvert.js
index e2d9d17a191b..bdb7d5778faf 100644
--- a/ads/vendors/directadvert.js
+++ b/ads/vendors/directadvert.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 import {serializeQueryString} from '../../src/url';
 
diff --git a/ads/vendors/directadvert.md b/ads/vendors/directadvert.md
index 210fa5894a3c..f67ae0a09b7b 100644
--- a/ads/vendors/directadvert.md
+++ b/ads/vendors/directadvert.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Directadvert
 
 ## Example
diff --git a/ads/vendors/distroscale.js b/ads/vendors/distroscale.js
index b2f03118cfcc..df7210df0b34 100644
--- a/ads/vendors/distroscale.js
+++ b/ads/vendors/distroscale.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/distroscale.md b/ads/vendors/distroscale.md
index 7723720eab74..888901e24e64 100644
--- a/ads/vendors/distroscale.md
+++ b/ads/vendors/distroscale.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # DistroScale
 
 ## Example
diff --git a/ads/vendors/dotandads.js b/ads/vendors/dotandads.js
index a90a2da6ce1d..f36f19fda691 100644
--- a/ads/vendors/dotandads.js
+++ b/ads/vendors/dotandads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/dotandads.md b/ads/vendors/dotandads.md
index c2e2c395beee..8eab6a22306c 100644
--- a/ads/vendors/dotandads.md
+++ b/ads/vendors/dotandads.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # DotAndAds
 
 ## Examples
diff --git a/ads/vendors/dynad.js b/ads/vendors/dynad.js
index a86773523a0e..6f71c2d37890 100644
--- a/ads/vendors/dynad.js
+++ b/ads/vendors/dynad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   validateData,
   validateSrcContains,
diff --git a/ads/vendors/dynad.md b/ads/vendors/dynad.md
index 0f34ff7c44d6..8346cf8e00a7 100644
--- a/ads/vendors/dynad.md
+++ b/ads/vendors/dynad.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # DynAd
 
 ## Example
diff --git a/ads/vendors/eadv.js b/ads/vendors/eadv.js
index b2d906266e9e..1dd5690aa132 100644
--- a/ads/vendors/eadv.js
+++ b/ads/vendors/eadv.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/eadv.md b/ads/vendors/eadv.md
index a63949d515f0..9b2c099ad97a 100644
--- a/ads/vendors/eadv.md
+++ b/ads/vendors/eadv.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # eADV
 
 ## Example
diff --git a/ads/vendors/empower.js b/ads/vendors/empower.js
index 411ca8b38bb6..7cc412269a74 100644
--- a/ads/vendors/empower.js
+++ b/ads/vendors/empower.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/empower.md b/ads/vendors/empower.md
index b840cc2473ef..7e8c7a2afc9b 100644
--- a/ads/vendors/empower.md
+++ b/ads/vendors/empower.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Empower
 
 ## Example
diff --git a/ads/vendors/engageya.js b/ads/vendors/engageya.js
index bc79c2e90dbf..49fb52ee4b1f 100644
--- a/ads/vendors/engageya.js
+++ b/ads/vendors/engageya.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/engageya.md b/ads/vendors/engageya.md
index fc7e73f4400e..af831460a929 100644
--- a/ads/vendors/engageya.md
+++ b/ads/vendors/engageya.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Engageya
 
 ## Example of Engageya's widget implementation
diff --git a/ads/vendors/epeex.js b/ads/vendors/epeex.js
index 9f276900bdf5..cbad73bafdd4 100644
--- a/ads/vendors/epeex.js
+++ b/ads/vendors/epeex.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/eplanning.js b/ads/vendors/eplanning.js
index 2fb377b5065f..21b65c9a3a86 100644
--- a/ads/vendors/eplanning.js
+++ b/ads/vendors/eplanning.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/eplanning.md b/ads/vendors/eplanning.md
index 8e4490edc447..df140efcb896 100644
--- a/ads/vendors/eplanning.md
+++ b/ads/vendors/eplanning.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # e-planning
 
 ## Example
diff --git a/ads/vendors/exco.js b/ads/vendors/exco.js
index 971bc9de09fc..7d088ed6c8b3 100644
--- a/ads/vendors/exco.js
+++ b/ads/vendors/exco.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 const requiredParams = ['id'];
diff --git a/ads/vendors/exco.md b/ads/vendors/exco.md
index 5384679d6130..d0a87c714c1f 100644
--- a/ads/vendors/exco.md
+++ b/ads/vendors/exco.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # EXCO
 
 ## Example
diff --git a/ads/vendors/ezoic.js b/ads/vendors/ezoic.js
index 30c75be7578b..21f4c8cc2084 100644
--- a/ads/vendors/ezoic.js
+++ b/ads/vendors/ezoic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/ezoic.md b/ads/vendors/ezoic.md
index 9a0a6cbcd724..b1f96a64a860 100644
--- a/ads/vendors/ezoic.md
+++ b/ads/vendors/ezoic.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Ezoic
 
 ## Example
diff --git a/ads/vendors/f1e.js b/ads/vendors/f1e.js
index dfc2c880cc6e..4aee19f438e4 100644
--- a/ads/vendors/f1e.js
+++ b/ads/vendors/f1e.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/f1e.md b/ads/vendors/f1e.md
index c9030ffee0a6..a023688bf662 100644
--- a/ads/vendors/f1e.md
+++ b/ads/vendors/f1e.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # FlexOneELEPHANT
 
 ## Example
diff --git a/ads/vendors/f1h.js b/ads/vendors/f1h.js
index 3064151b481e..a487eae94297 100644
--- a/ads/vendors/f1h.js
+++ b/ads/vendors/f1h.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/f1h.md b/ads/vendors/f1h.md
index 75aaf9dc3e87..a872e08c8854 100644
--- a/ads/vendors/f1h.md
+++ b/ads/vendors/f1h.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # F1H
 
 ## Examples
diff --git a/ads/vendors/feedad.md b/ads/vendors/feedad.md
index b842e6afb293..46d77cc0a0c3 100644
--- a/ads/vendors/feedad.md
+++ b/ads/vendors/feedad.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # FeedAd
 
 ## Example
diff --git a/ads/vendors/felmat.js b/ads/vendors/felmat.js
index c287f70b5d18..19fcbc72d79e 100644
--- a/ads/vendors/felmat.js
+++ b/ads/vendors/felmat.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/felmat.md b/ads/vendors/felmat.md
index d8ab2a4f4df5..55e1e17d23c2 100644
--- a/ads/vendors/felmat.md
+++ b/ads/vendors/felmat.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # felmat
 
 ## Example
diff --git a/ads/vendors/finative.js b/ads/vendors/finative.js
index 0bb22721675a..6fcbbf594102 100644
--- a/ads/vendors/finative.js
+++ b/ads/vendors/finative.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/finative.md b/ads/vendors/finative.md
index 3bf1eadb4b68..7a8784f735cc 100644
--- a/ads/vendors/finative.md
+++ b/ads/vendors/finative.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # finative
 
 ​
diff --git a/ads/vendors/firstimpression.js b/ads/vendors/firstimpression.js
index e7351ef08e48..d67b4f4d4023 100644
--- a/ads/vendors/firstimpression.js
+++ b/ads/vendors/firstimpression.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseQueryString} from '#core/types/string/url';
 import {validateData, writeScript} from '#3p/3p';
 
diff --git a/ads/vendors/firstimpression.md b/ads/vendors/firstimpression.md
index dbcb958df782..e074a8844122 100644
--- a/ads/vendors/firstimpression.md
+++ b/ads/vendors/firstimpression.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # FirstImpression.io
 
 FirstImpression.io `amp-ad` tag is intended to be created dynamically by [`amp-auto-ads` extension](../extensions/amp-auto-ads/amp-auto-ads.md), which sets all the required parameters.
diff --git a/ads/vendors/flite.js b/ads/vendors/flite.js
index 09701763e536..832db4c77ab3 100644
--- a/ads/vendors/flite.js
+++ b/ads/vendors/flite.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/flite.md b/ads/vendors/flite.md
index 8907abda11fb..56657b7e3101 100644
--- a/ads/vendors/flite.md
+++ b/ads/vendors/flite.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Flite
 
 ## Example
diff --git a/ads/vendors/fluct.js b/ads/vendors/fluct.js
index c630fe2285dc..39b91a8ccd2e 100644
--- a/ads/vendors/fluct.js
+++ b/ads/vendors/fluct.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData, writeScript} from '#3p/3p';
 
 /* global adingoFluct: false */
diff --git a/ads/vendors/fluct.md b/ads/vendors/fluct.md
index 06e21b20c81c..53635c62c6dc 100644
--- a/ads/vendors/fluct.md
+++ b/ads/vendors/fluct.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # fluct
 
 ## Example
diff --git a/ads/vendors/forkmedia.js b/ads/vendors/forkmedia.js
index 0a850f14fd39..79d64b89450a 100644
--- a/ads/vendors/forkmedia.js
+++ b/ads/vendors/forkmedia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/forkmedia.md b/ads/vendors/forkmedia.md
index 76f0711ed144..5cc2effa9e89 100644
--- a/ads/vendors/forkmedia.md
+++ b/ads/vendors/forkmedia.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Fork Media
 
 ## Example
diff --git a/ads/vendors/freewheel.js b/ads/vendors/freewheel.js
index aa0e8d4bb2b2..ca5459befcd2 100644
--- a/ads/vendors/freewheel.js
+++ b/ads/vendors/freewheel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/freewheel.md b/ads/vendors/freewheel.md
index 008b975b78d0..41a9dcf04b36 100644
--- a/ads/vendors/freewheel.md
+++ b/ads/vendors/freewheel.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # FreeWheel
 
 ## Example
diff --git a/ads/vendors/fusion.js b/ads/vendors/fusion.js
index 0ce29e754a33..309e0a49e30d 100644
--- a/ads/vendors/fusion.js
+++ b/ads/vendors/fusion.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/fusion.md b/ads/vendors/fusion.md
index 8ed9f3b8d694..8a6ff5fed407 100644
--- a/ads/vendors/fusion.md
+++ b/ads/vendors/fusion.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Fusion
 
 ## Example
diff --git a/ads/vendors/gecko.js b/ads/vendors/gecko.js
index b61fd0905607..5c56ea78ab0c 100644
--- a/ads/vendors/gecko.js
+++ b/ads/vendors/gecko.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/gecko.md b/ads/vendors/gecko.md
index 3ab60d18c5e2..e76da87c9ffb 100644
--- a/ads/vendors/gecko.md
+++ b/ads/vendors/gecko.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Gecko
 
 ## Example of Gecko's widget implementation
diff --git a/ads/vendors/genieessp.js b/ads/vendors/genieessp.js
index fdd1f4bf903e..7832091f8c7f 100644
--- a/ads/vendors/genieessp.js
+++ b/ads/vendors/genieessp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/genieessp.md b/ads/vendors/genieessp.md
index c64bb1f88159..f247c0900d93 100644
--- a/ads/vendors/genieessp.md
+++ b/ads/vendors/genieessp.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Geniee SSP
 
 Please visit [Geniee SSP website](https://www.geniee.co.jp/) for more information.
diff --git a/ads/vendors/giraff.js b/ads/vendors/giraff.js
index 13e8d7768551..c72d84d8c626 100644
--- a/ads/vendors/giraff.js
+++ b/ads/vendors/giraff.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/giraff.md b/ads/vendors/giraff.md
index 42105fecdf4a..1a0ba7159cfe 100644
--- a/ads/vendors/giraff.md
+++ b/ads/vendors/giraff.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Giraff
 
 ## Example
diff --git a/ads/vendors/glomex.js b/ads/vendors/glomex.js
index d2bedd70b63c..18a996680bc4 100644
--- a/ads/vendors/glomex.js
+++ b/ads/vendors/glomex.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/glomex.md b/ads/vendors/glomex.md
index 84ea63e78bb1..fe3feae36259 100644
--- a/ads/vendors/glomex.md
+++ b/ads/vendors/glomex.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Glomex
 
 ## Example
diff --git a/ads/vendors/gmossp.js b/ads/vendors/gmossp.js
index 329029ce3669..f83516f709ef 100644
--- a/ads/vendors/gmossp.js
+++ b/ads/vendors/gmossp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 const gmosspFields = ['id'];
diff --git a/ads/vendors/gmossp.md b/ads/vendors/gmossp.md
index 8fde5bf4c937..af84c8640196 100644
--- a/ads/vendors/gmossp.md
+++ b/ads/vendors/gmossp.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # GMOSSP
 
 ## Example
diff --git a/ads/vendors/gumgum.js b/ads/vendors/gumgum.js
index 34db052a3238..6a9f8518ef35 100644
--- a/ads/vendors/gumgum.js
+++ b/ads/vendors/gumgum.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 import {setStyles} from '#core/dom/style';
 
diff --git a/ads/vendors/gumgum.md b/ads/vendors/gumgum.md
index d39aae2bedf8..b95ea3254289 100644
--- a/ads/vendors/gumgum.md
+++ b/ads/vendors/gumgum.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # GumGum
 
 ## Example
diff --git a/ads/vendors/holder.js b/ads/vendors/holder.js
index becb95394e85..a9fda53d6e75 100644
--- a/ads/vendors/holder.js
+++ b/ads/vendors/holder.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/holder.md b/ads/vendors/holder.md
index 920d24d25abf..cd6deddfd0d1 100644
--- a/ads/vendors/holder.md
+++ b/ads/vendors/holder.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Holder
 
 ## Example
diff --git a/ads/vendors/ibillboard.js b/ads/vendors/ibillboard.js
index bf623b85ba95..0acbab3c629a 100644
--- a/ads/vendors/ibillboard.js
+++ b/ads/vendors/ibillboard.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, validateSrcPrefix, writeScript} from '#3p/3p';
 
 const validHosts = [
diff --git a/ads/vendors/ibillboard.md b/ads/vendors/ibillboard.md
index c20e9826e028..1f8413562f46 100644
--- a/ads/vendors/ibillboard.md
+++ b/ads/vendors/ibillboard.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # iBILLBOARD AdServer
 
 Please visit the [ibillboard website](http://www.ibillboard.com) for more information.
diff --git a/ads/vendors/idealmedia.js b/ads/vendors/idealmedia.js
index 28f18dd2ebe5..84250f4f553f 100644
--- a/ads/vendors/idealmedia.js
+++ b/ads/vendors/idealmedia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/idealmedia.md b/ads/vendors/idealmedia.md
index e70d8eb9e8e1..ea1a4ec1c2ce 100644
--- a/ads/vendors/idealmedia.md
+++ b/ads/vendors/idealmedia.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Idealmedia
 
 ## Example
diff --git a/ads/vendors/imobile.js b/ads/vendors/imobile.js
index 00549682cae9..71eeb50815b9 100644
--- a/ads/vendors/imobile.js
+++ b/ads/vendors/imobile.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {writeScript} from '#3p/3p';
 /**
  * @param {!Window} global
diff --git a/ads/vendors/imobile.md b/ads/vendors/imobile.md
index 723e7f9690e6..bf5388cb9b2a 100644
--- a/ads/vendors/imobile.md
+++ b/ads/vendors/imobile.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # IMobile
 
 ## Example
diff --git a/ads/vendors/imonomy.js b/ads/vendors/imonomy.js
index a68ea3f79fd0..3d0568d32284 100644
--- a/ads/vendors/imonomy.js
+++ b/ads/vendors/imonomy.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {doubleclick} from '#ads/google/doubleclick';
 import {hasOwn} from '#core/types/object';
 import {loadScript, writeScript} from '#3p/3p';
diff --git a/ads/vendors/imonomy.md b/ads/vendors/imonomy.md
index 82839c471b28..c6f517863474 100644
--- a/ads/vendors/imonomy.md
+++ b/ads/vendors/imonomy.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Imonomy
 
 Imonomy supports Header Tag style bidding using Doubleclick as the ad server.
diff --git a/ads/vendors/improvedigital.js b/ads/vendors/improvedigital.js
index 0820ba796805..17833660c78f 100755
--- a/ads/vendors/improvedigital.js
+++ b/ads/vendors/improvedigital.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/improvedigital.md b/ads/vendors/improvedigital.md
index c3932ba6822d..1fe911a877c8 100755
--- a/ads/vendors/improvedigital.md
+++ b/ads/vendors/improvedigital.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Improve Digital
 
 Please refer to [Improve Digital Help Center](https://improvedigital.zendesk.com/hc/en-us) for more
diff --git a/ads/vendors/industrybrains.md b/ads/vendors/industrybrains.md
index 5388519da748..618eac922a8f 100644
--- a/ads/vendors/industrybrains.md
+++ b/ads/vendors/industrybrains.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Industrybrains
 
 ## Example
diff --git a/ads/vendors/inmobi.js b/ads/vendors/inmobi.js
index 9f3757dfc271..16010a5f13d6 100644
--- a/ads/vendors/inmobi.js
+++ b/ads/vendors/inmobi.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {setStyle} from '#core/dom/style';
 import {validateData, writeScript} from '#3p/3p';
 
diff --git a/ads/vendors/inmobi.md b/ads/vendors/inmobi.md
index 4dc11f65c6d5..33510490f17c 100644
--- a/ads/vendors/inmobi.md
+++ b/ads/vendors/inmobi.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # InMobi
 
 ## Examples
diff --git a/ads/vendors/innity.js b/ads/vendors/innity.js
index 49ed70faf328..594803c49b1e 100644
--- a/ads/vendors/innity.js
+++ b/ads/vendors/innity.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/insticator.js b/ads/vendors/insticator.js
index 7f93c932f2e6..8d3077decd7a 100644
--- a/ads/vendors/insticator.js
+++ b/ads/vendors/insticator.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/insticator.md b/ads/vendors/insticator.md
index 70b7c0e0ee60..83dcb5f3534b 100644
--- a/ads/vendors/insticator.md
+++ b/ads/vendors/insticator.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Insticator
 
 Our embed serves content and ads that align with your audience. It reflects your visitor's interests and increases engagement.
diff --git a/ads/vendors/invibes.js b/ads/vendors/invibes.js
index 100c3166b962..11203fa38fa9 100644
--- a/ads/vendors/invibes.js
+++ b/ads/vendors/invibes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/invibes.md b/ads/vendors/invibes.md
index 2b06e7d5bb17..e08802cf08be 100644
--- a/ads/vendors/invibes.md
+++ b/ads/vendors/invibes.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Invibes
 
 ## Example
diff --git a/ads/vendors/iprom.js b/ads/vendors/iprom.js
index 6be36c8e6632..ce274f9d0a6c 100644
--- a/ads/vendors/iprom.js
+++ b/ads/vendors/iprom.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseJson} from '#core/types/object/json';
 import {validateData, writeScript} from '#3p/3p';
 
diff --git a/ads/vendors/iprom.md b/ads/vendors/iprom.md
index 79158a126ba1..d08935840117 100644
--- a/ads/vendors/iprom.md
+++ b/ads/vendors/iprom.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Iprom
 
 ## Examples
diff --git a/ads/vendors/ix.js b/ads/vendors/ix.js
index 0b7ce6323b18..272a3dd65560 100644
--- a/ads/vendors/ix.js
+++ b/ads/vendors/ix.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {doubleclick} from '#ads/google/doubleclick';
 import {hasOwn} from '#core/types/object';
 import {loadScript, writeScript} from '#3p/3p';
diff --git a/ads/vendors/ix.md b/ads/vendors/ix.md
index a3a32a3976dc..4cf5c1e4778a 100644
--- a/ads/vendors/ix.md
+++ b/ads/vendors/ix.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Index Exchange AMP RTC
 
 Index Exchange (IX) supports [AMP Real Time Config (RTC)](https://github.com/ampproject/amphtml/blob/main/extensions/amp-a4a/rtc-publisher-implementation-guide.md) which allows Publishers to augment their ad requests with targeting information that is retrieved at runtime. This document provides instructions on adding IX as a vendor to AMP pages.
diff --git a/ads/vendors/jixie.js b/ads/vendors/jixie.js
index 01c15dd2b807..12511aa5479d 100644
--- a/ads/vendors/jixie.js
+++ b/ads/vendors/jixie.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/jixie.md b/ads/vendors/jixie.md
index 5b8d1424005c..6a4e54428b15 100644
--- a/ads/vendors/jixie.md
+++ b/ads/vendors/jixie.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # JIXIE
 
 ## Example of JIXIE AD implementation
diff --git a/ads/vendors/jubna.js b/ads/vendors/jubna.js
index 572b26a7fee8..97e2b5ada3b9 100644
--- a/ads/vendors/jubna.js
+++ b/ads/vendors/jubna.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/jubna.md b/ads/vendors/jubna.md
index 522a3c9bb4d8..1a16cad4bf3f 100644
--- a/ads/vendors/jubna.md
+++ b/ads/vendors/jubna.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # JUBNA
 
 ## Example of JUBNA's widget implementation
diff --git a/ads/vendors/kargo.js b/ads/vendors/kargo.js
index b4d635b18153..bc322f33bc59 100644
--- a/ads/vendors/kargo.js
+++ b/ads/vendors/kargo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {computeInMasterFrame, loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/kargo.md b/ads/vendors/kargo.md
index a2c0f4950a5c..fb23182d5284 100644
--- a/ads/vendors/kargo.md
+++ b/ads/vendors/kargo.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Kargo
 
 ## Example
diff --git a/ads/vendors/ketshwa.js b/ads/vendors/ketshwa.js
index 2d4fb77925f6..53fac666598e 100644
--- a/ads/vendors/ketshwa.js
+++ b/ads/vendors/ketshwa.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/kiosked.js b/ads/vendors/kiosked.js
index 3a94ea53e6c7..2f1d1b67eb43 100644
--- a/ads/vendors/kiosked.js
+++ b/ads/vendors/kiosked.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {hasOwn} from '#core/types/object';
 import {validateData, writeScript} from '#3p/3p';
 
diff --git a/ads/vendors/kiosked.md b/ads/vendors/kiosked.md
index 1959888affca..dc599696d8f8 100644
--- a/ads/vendors/kiosked.md
+++ b/ads/vendors/kiosked.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Kiosked
 
 ## Example
diff --git a/ads/vendors/kixer.js b/ads/vendors/kixer.js
index 7a1d58e9b661..3b657c8096a4 100644
--- a/ads/vendors/kixer.js
+++ b/ads/vendors/kixer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 import {parseUrlDeprecated} from '../../src/url';
 
diff --git a/ads/vendors/kixer.md b/ads/vendors/kixer.md
index 2fdc94d62b41..384e81553e51 100644
--- a/ads/vendors/kixer.md
+++ b/ads/vendors/kixer.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Kixer
 
 ## Example
diff --git a/ads/vendors/kuadio.js b/ads/vendors/kuadio.js
index 225a14efcdea..fed54e21b8ac 100644
--- a/ads/vendors/kuadio.js
+++ b/ads/vendors/kuadio.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/kuadio.md b/ads/vendors/kuadio.md
index 16c7d00538ea..dac78e8b51da 100644
--- a/ads/vendors/kuadio.md
+++ b/ads/vendors/kuadio.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Kuadio
 
 ## Example
diff --git a/ads/vendors/lentainform.js b/ads/vendors/lentainform.js
index bafdfe1855c2..1953bd49b7a3 100644
--- a/ads/vendors/lentainform.js
+++ b/ads/vendors/lentainform.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/ligatus.js b/ads/vendors/ligatus.js
index 68dfa804c9c0..7626a75b62b6 100644
--- a/ads/vendors/ligatus.js
+++ b/ads/vendors/ligatus.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateSrcPrefix, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/ligatus.md b/ads/vendors/ligatus.md
index 73272755f598..0882d7229a1b 100644
--- a/ads/vendors/ligatus.md
+++ b/ads/vendors/ligatus.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Ligatus
 
 ## Example
diff --git a/ads/vendors/lockerdome.js b/ads/vendors/lockerdome.js
index fb6e77799244..d1e66af816af 100644
--- a/ads/vendors/lockerdome.js
+++ b/ads/vendors/lockerdome.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/lockerdome.md b/ads/vendors/lockerdome.md
index 4dc518a4fc8d..5f7fe4ef63e3 100644
--- a/ads/vendors/lockerdome.md
+++ b/ads/vendors/lockerdome.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # LockerDome
 
 ## Example
diff --git a/ads/vendors/logly.js b/ads/vendors/logly.js
index a74fb0b8cb1e..934b4695491f 100644
--- a/ads/vendors/logly.js
+++ b/ads/vendors/logly.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/logly.md b/ads/vendors/logly.md
index 27f810a7a64a..ff698dde6ed8 100644
--- a/ads/vendors/logly.md
+++ b/ads/vendors/logly.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # logly
 
 ## Display
diff --git a/ads/vendors/loka.js b/ads/vendors/loka.js
index 30dd1350f28e..ad8224267b47 100644
--- a/ads/vendors/loka.js
+++ b/ads/vendors/loka.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/loka.md b/ads/vendors/loka.md
index 92eccbce7949..a6d4cb44c5af 100644
--- a/ads/vendors/loka.md
+++ b/ads/vendors/loka.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 ## Example
 
 ### Mobile Video Banner
diff --git a/ads/vendors/luckyads.js b/ads/vendors/luckyads.js
index d1057d3c3228..ed7bece01dba 100644
--- a/ads/vendors/luckyads.js
+++ b/ads/vendors/luckyads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/luckyads.md b/ads/vendors/luckyads.md
index d9d94c215477..e0ae7f4baf9e 100644
--- a/ads/vendors/luckyads.md
+++ b/ads/vendors/luckyads.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # LuckyAds
 
 Provides support for [LuckyAds](https://luckyads.pro/) widgets.
diff --git a/ads/vendors/macaw.js b/ads/vendors/macaw.js
index 88cc466f647a..01f6d62f0d96 100644
--- a/ads/vendors/macaw.js
+++ b/ads/vendors/macaw.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/mads.js b/ads/vendors/mads.js
index 565fe7c8f713..9e6e6a409425 100644
--- a/ads/vendors/mads.js
+++ b/ads/vendors/mads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/mads.md b/ads/vendors/mads.md
index 2e1b222e38ff..e8b3b35ed8cf 100644
--- a/ads/vendors/mads.md
+++ b/ads/vendors/mads.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # MADS
 
 ## Example
diff --git a/ads/vendors/mantis.js b/ads/vendors/mantis.js
index 1b045d93450e..ce31a479b57d 100644
--- a/ads/vendors/mantis.js
+++ b/ads/vendors/mantis.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/mantis.md b/ads/vendors/mantis.md
index c9233e5ff2c0..b69e28903c56 100644
--- a/ads/vendors/mantis.md
+++ b/ads/vendors/mantis.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # MANTIS® Ad Network
 
 Please visit the [MANTIS® Ad Network website](https://www.mantisadnetwork.com) for more information about MANTIS. If you have an issues implementing these tags, please [contact MANTIS](http://www.mantisadnetwork.com/contact/).
diff --git a/ads/vendors/marfeel.js b/ads/vendors/marfeel.js
index f963642ba838..48d8a4e6cb3a 100644
--- a/ads/vendors/marfeel.js
+++ b/ads/vendors/marfeel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/marfeel.md b/ads/vendors/marfeel.md
index 147fae7fbb61..37434c44ad0f 100644
--- a/ads/vendors/marfeel.md
+++ b/ads/vendors/marfeel.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Marfeel
 
 ## Example
diff --git a/ads/vendors/mediaad.js b/ads/vendors/mediaad.js
index b625b142037f..ca842162595c 100644
--- a/ads/vendors/mediaad.js
+++ b/ads/vendors/mediaad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/mediaad.md b/ads/vendors/mediaad.md
index 7d801cc0a85d..5f628493b3a8 100644
--- a/ads/vendors/mediaad.md
+++ b/ads/vendors/mediaad.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Mediaad
 
 ## Example
diff --git a/ads/vendors/medianet.js b/ads/vendors/medianet.js
index 8c6df1d02c79..78450ef3a88b 100644
--- a/ads/vendors/medianet.js
+++ b/ads/vendors/medianet.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {computeInMasterFrame, validateData, writeScript} from '#3p/3p';
 import {getSourceUrl, parseUrlDeprecated} from '../../src/url';
 import {hasOwn} from '#core/types/object';
diff --git a/ads/vendors/medianet.md b/ads/vendors/medianet.md
index 46ecd8738dc7..cc48a2b4a62c 100644
--- a/ads/vendors/medianet.md
+++ b/ads/vendors/medianet.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Media.net
 
 Media.net adapter supports the integration of both, its Contextual Monetization solution and the Header Bidding solution.
diff --git a/ads/vendors/mediavine.js b/ads/vendors/mediavine.js
index b67abbcb91f5..8d86e7fe9d55 100644
--- a/ads/vendors/mediavine.js
+++ b/ads/vendors/mediavine.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/mediavine.md b/ads/vendors/mediavine.md
index 9f70996ffe1d..43a0453f870e 100644
--- a/ads/vendors/mediavine.md
+++ b/ads/vendors/mediavine.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Mediavine
 
 ## Example
diff --git a/ads/vendors/medyanet.js b/ads/vendors/medyanet.js
index 13dbaf8662fb..53b1b7bcb2f3 100644
--- a/ads/vendors/medyanet.js
+++ b/ads/vendors/medyanet.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {setStyles} from '#core/dom/style';
 import {validateData} from '#3p/3p';
 
diff --git a/ads/vendors/medyanet.md b/ads/vendors/medyanet.md
index faf23f7fe795..adcb4ab99f0d 100644
--- a/ads/vendors/medyanet.md
+++ b/ads/vendors/medyanet.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Medyanet
 
 ## Example
diff --git a/ads/vendors/meg.js b/ads/vendors/meg.js
index eef414978d25..7f6e15848e91 100644
--- a/ads/vendors/meg.js
+++ b/ads/vendors/meg.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/meg.md b/ads/vendors/meg.md
index c7f1df2e27ac..477af8f8d48d 100644
--- a/ads/vendors/meg.md
+++ b/ads/vendors/meg.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Meg
 
 Please visit [www.meg.com](https://www.meg.com) for more information.
diff --git a/ads/vendors/mgid.js b/ads/vendors/mgid.js
index d838929b05ec..84317509af99 100644
--- a/ads/vendors/mgid.js
+++ b/ads/vendors/mgid.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/mgid.md b/ads/vendors/mgid.md
index 0ccd524a8e95..67f9824787c6 100644
--- a/ads/vendors/mgid.md
+++ b/ads/vendors/mgid.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # MGID
 
 ## Example
diff --git a/ads/vendors/miximedia.js b/ads/vendors/miximedia.js
index 7c3212171158..32b572226b09 100644
--- a/ads/vendors/miximedia.js
+++ b/ads/vendors/miximedia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/miximedia.md b/ads/vendors/miximedia.md
index 7af779eb7456..28fa702192e9 100644
--- a/ads/vendors/miximedia.md
+++ b/ads/vendors/miximedia.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Mixi.Media
 
 Mixi.Media is a service for personalizing content network. Please visit our [Mixi.Media](https://Mixi.Media/dashboard) for more information.
diff --git a/ads/vendors/mixpo.js b/ads/vendors/mixpo.js
index 1b976a53d8fa..4b55a39665d8 100644
--- a/ads/vendors/mixpo.js
+++ b/ads/vendors/mixpo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/monetizer101.js b/ads/vendors/monetizer101.js
index e0c1039af070..bb58164e846f 100644
--- a/ads/vendors/monetizer101.js
+++ b/ads/vendors/monetizer101.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/monetizer101.md b/ads/vendors/monetizer101.md
index c7415ab70c84..b58835d0725e 100644
--- a/ads/vendors/monetizer101.md
+++ b/ads/vendors/monetizer101.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Monetizer101
 
 ## Example
diff --git a/ads/vendors/mox.js b/ads/vendors/mox.js
index de58fd392b09..aed9f3d21585 100644
--- a/ads/vendors/mox.js
+++ b/ads/vendors/mox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/mox.md b/ads/vendors/mox.md
index 58130d400048..e05b0746fe27 100644
--- a/ads/vendors/mox.md
+++ b/ads/vendors/mox.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # mox.tv
 
 Please visit our [website](https://mox.tv) for more information about us.
diff --git a/ads/vendors/my6sense.js b/ads/vendors/my6sense.js
index bb729dfb39a9..5b9f251eef52 100644
--- a/ads/vendors/my6sense.js
+++ b/ads/vendors/my6sense.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/myfinance.js b/ads/vendors/myfinance.js
index c3491839bda7..daa0efc8eb5d 100644
--- a/ads/vendors/myfinance.js
+++ b/ads/vendors/myfinance.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 const mandatoryFields = ['adType'];
diff --git a/ads/vendors/myfinance.md b/ads/vendors/myfinance.md
index ec6c4af1df94..d45fd8635f74 100644
--- a/ads/vendors/myfinance.md
+++ b/ads/vendors/myfinance.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # MyFinance
 
 Serves ads from [MyFinance](https://www.myfinance.com/).
diff --git a/ads/vendors/myoffrz.js b/ads/vendors/myoffrz.js
index 92a53744b190..7374519e723b 100644
--- a/ads/vendors/myoffrz.js
+++ b/ads/vendors/myoffrz.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/myoffrz.md b/ads/vendors/myoffrz.md
index a2969fa16d2f..b10c9669d131 100644
--- a/ads/vendors/myoffrz.md
+++ b/ads/vendors/myoffrz.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # myoffrz
 
 ## Example
diff --git a/ads/vendors/mytarget.js b/ads/vendors/mytarget.js
index 22b4c3f83ce0..e159e28621e2 100644
--- a/ads/vendors/mytarget.js
+++ b/ads/vendors/mytarget.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 import {setStyles} from '#core/dom/style';
 
diff --git a/ads/vendors/mytarget.md b/ads/vendors/mytarget.md
index 671585b66023..f759d68ca3bb 100644
--- a/ads/vendors/mytarget.md
+++ b/ads/vendors/mytarget.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # myTarget
 
 myTarget network - monetize mobile app, mobile web and desktop inventory.
diff --git a/ads/vendors/mywidget.js b/ads/vendors/mywidget.js
index b9ab9a7b81a6..6318e2aae7d0 100644
--- a/ads/vendors/mywidget.js
+++ b/ads/vendors/mywidget.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/mywidget.md b/ads/vendors/mywidget.md
index f843a40aca83..b25d2b62b962 100644
--- a/ads/vendors/mywidget.md
+++ b/ads/vendors/mywidget.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # myWidget
 
 myWidget is a service for personalizing content and increasing user metrics.
diff --git a/ads/vendors/nativeroll.js b/ads/vendors/nativeroll.js
index c6a538af8d0f..03968e50b51a 100644
--- a/ads/vendors/nativeroll.js
+++ b/ads/vendors/nativeroll.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/nativery.js b/ads/vendors/nativery.js
index 3fa527989e79..8fd27d3a90d1 100644
--- a/ads/vendors/nativery.js
+++ b/ads/vendors/nativery.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {toArray} from '#core/types/array';
 import {validateData, writeScript} from '#3p/3p';
 
diff --git a/ads/vendors/nativery.md b/ads/vendors/nativery.md
index de69333e6a10..58adc0553719 100644
--- a/ads/vendors/nativery.md
+++ b/ads/vendors/nativery.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Nativery
 
 ## Example
diff --git a/ads/vendors/nativo.md b/ads/vendors/nativo.md
index 489a5c6f945d..4efd619b7796 100644
--- a/ads/vendors/nativo.md
+++ b/ads/vendors/nativo.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Nativo
 
 ## Example
diff --git a/ads/vendors/navegg.js b/ads/vendors/navegg.js
index 04220227e55f..b9ed93c79283 100644
--- a/ads/vendors/navegg.js
+++ b/ads/vendors/navegg.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {doubleclick} from '#ads/google/doubleclick';
 import {loadScript, validateData} from '#3p/3p';
 
diff --git a/ads/vendors/navegg.md b/ads/vendors/navegg.md
index 403c62ef8dd1..ab60804481de 100644
--- a/ads/vendors/navegg.md
+++ b/ads/vendors/navegg.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Navegg
 
 Serves ads to AMP pages using Navegg data.
diff --git a/ads/vendors/nend.js b/ads/vendors/nend.js
index 05f14515ea68..a08e489d8763 100644
--- a/ads/vendors/nend.js
+++ b/ads/vendors/nend.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 const nendFields = ['nend_params'];
diff --git a/ads/vendors/nend.md b/ads/vendors/nend.md
index 1655d02cdda1..30dee17895d6 100644
--- a/ads/vendors/nend.md
+++ b/ads/vendors/nend.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Nend
 
 ## Example
diff --git a/ads/vendors/netletix.js b/ads/vendors/netletix.js
index 2eaf5652ee90..129511a7995d 100644
--- a/ads/vendors/netletix.js
+++ b/ads/vendors/netletix.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {addParamsToUrl, assertHttpsUrl} from '../../src/url';
 import {dev} from '../../src/log';
 import {dict} from '#core/types/object';
diff --git a/ads/vendors/netletix.md b/ads/vendors/netletix.md
index 6835910fbdb8..85ed1f3a964a 100644
--- a/ads/vendors/netletix.md
+++ b/ads/vendors/netletix.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # netletix
 
 ## Example
diff --git a/ads/vendors/noddus.js b/ads/vendors/noddus.js
index f51a1a6cc06e..2e48098b5031 100644
--- a/ads/vendors/noddus.js
+++ b/ads/vendors/noddus.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/noddus.md b/ads/vendors/noddus.md
index 253c7a63b653..e5cf7b5ea12d 100644
--- a/ads/vendors/noddus.md
+++ b/ads/vendors/noddus.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Noddus
 
 ## Example
diff --git a/ads/vendors/nokta.js b/ads/vendors/nokta.js
index 8c3aba891a05..f5885a816744 100644
--- a/ads/vendors/nokta.js
+++ b/ads/vendors/nokta.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/nokta.md b/ads/vendors/nokta.md
index d0f1803cacf9..0d296619f3a5 100644
--- a/ads/vendors/nokta.md
+++ b/ads/vendors/nokta.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Nokta
 
 ## Example
diff --git a/ads/vendors/nws.js b/ads/vendors/nws.js
index 421ac0dd6e3f..9c1625f0915c 100644
--- a/ads/vendors/nws.js
+++ b/ads/vendors/nws.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateSrcPrefix, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/nws.md b/ads/vendors/nws.md
index f21f96f93232..fd1d764fc138 100644
--- a/ads/vendors/nws.md
+++ b/ads/vendors/nws.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Newsroom AI
 
 ## Example
diff --git a/ads/vendors/oblivki.js b/ads/vendors/oblivki.js
index d10ad41e60ff..8da774f8cda5 100644
--- a/ads/vendors/oblivki.js
+++ b/ads/vendors/oblivki.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 const oblivkiFields = ['id'];
diff --git a/ads/vendors/oblivki.md b/ads/vendors/oblivki.md
index 0d43de91b689..ca2914741d8e 100644
--- a/ads/vendors/oblivki.md
+++ b/ads/vendors/oblivki.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Oblivki
 
 ## Example
diff --git a/ads/vendors/onead.js b/ads/vendors/onead.js
index 02926fd102d5..61b0b3f4012e 100644
--- a/ads/vendors/onead.js
+++ b/ads/vendors/onead.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/onead.md b/ads/vendors/onead.md
index fced1385e5f0..a858e5b074a1 100644
--- a/ads/vendors/onead.md
+++ b/ads/vendors/onead.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # OneAD
 
 ## Example
diff --git a/ads/vendors/onnetwork.md b/ads/vendors/onnetwork.md
index 198ef44390fa..2459a4009fa4 100644
--- a/ads/vendors/onnetwork.md
+++ b/ads/vendors/onnetwork.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # OnNetwork
 
 ## Examples
diff --git a/ads/vendors/openadstream.js b/ads/vendors/openadstream.js
index 431ff1a6d3f1..4ea84bb136b7 100644
--- a/ads/vendors/openadstream.js
+++ b/ads/vendors/openadstream.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/openadstream.md b/ads/vendors/openadstream.md
index 8110a6c7fa65..8dd5e2e4464f 100644
--- a/ads/vendors/openadstream.md
+++ b/ads/vendors/openadstream.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Open AdStream (OAS)
 
 ## Examples
diff --git a/ads/vendors/openx.js b/ads/vendors/openx.js
index ef9bc8300aaf..73304c9aebd1 100644
--- a/ads/vendors/openx.js
+++ b/ads/vendors/openx.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {doubleclick} from '#ads/google/doubleclick';
 import {loadScript, validateData, writeScript} from '#3p/3p';
 
diff --git a/ads/vendors/openx.md b/ads/vendors/openx.md
index ec302565bfa4..fa293260ffa0 100644
--- a/ads/vendors/openx.md
+++ b/ads/vendors/openx.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # OpenX
 
 ## Examples
diff --git a/ads/vendors/opinary.js b/ads/vendors/opinary.js
index df8afc5b3fd4..cc999d6e70f4 100644
--- a/ads/vendors/opinary.js
+++ b/ads/vendors/opinary.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/opinary.md b/ads/vendors/opinary.md
index 757b8c9891f4..4846a6cc0546 100644
--- a/ads/vendors/opinary.md
+++ b/ads/vendors/opinary.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Opinary
 
 ## Example
diff --git a/ads/vendors/outbrain.js b/ads/vendors/outbrain.js
index 1956299fc089..f82d2c829c37 100644
--- a/ads/vendors/outbrain.js
+++ b/ads/vendors/outbrain.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/outbrain.md b/ads/vendors/outbrain.md
index 2dbe4d037a5b..84134b30c931 100644
--- a/ads/vendors/outbrain.md
+++ b/ads/vendors/outbrain.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Outbrain
 
 ## Example installation of the Outbrain widget
diff --git a/ads/vendors/pixels.js b/ads/vendors/pixels.js
index 1a54cb96884b..8830aba9cd70 100644
--- a/ads/vendors/pixels.js
+++ b/ads/vendors/pixels.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/pixels.md b/ads/vendors/pixels.md
index 28dee798c468..5ccbf2cedfb0 100644
--- a/ads/vendors/pixels.md
+++ b/ads/vendors/pixels.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Pixels
 
 ## Example
diff --git a/ads/vendors/playstream.js b/ads/vendors/playstream.js
index 8b65be634a41..7aaf48fe4d23 100644
--- a/ads/vendors/playstream.js
+++ b/ads/vendors/playstream.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 const mandatoryParams = ['id'];
diff --git a/ads/vendors/playstream.md b/ads/vendors/playstream.md
index a8ecafb30c82..2e02e9b90a89 100644
--- a/ads/vendors/playstream.md
+++ b/ads/vendors/playstream.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # PlayStream
 
 ## Example
diff --git a/ads/vendors/plista.js b/ads/vendors/plista.js
index de51a23a4103..31184bbf4f70 100644
--- a/ads/vendors/plista.js
+++ b/ads/vendors/plista.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/plista.md b/ads/vendors/plista.md
index 48c4281fe578..98d1956dd8fd 100644
--- a/ads/vendors/plista.md
+++ b/ads/vendors/plista.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # plista
 
 ## Example
diff --git a/ads/vendors/polymorphicads.js b/ads/vendors/polymorphicads.js
index b9b1c28c11d0..1b462c4919a0 100644
--- a/ads/vendors/polymorphicads.js
+++ b/ads/vendors/polymorphicads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/polymorphicads.md b/ads/vendors/polymorphicads.md
index ef25eb93959f..1e4390761a43 100644
--- a/ads/vendors/polymorphicads.md
+++ b/ads/vendors/polymorphicads.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # PolymorphicAds
 
 ## Example
diff --git a/ads/vendors/popin.js b/ads/vendors/popin.js
index 885abd424def..6fbdab3fb6e6 100644
--- a/ads/vendors/popin.js
+++ b/ads/vendors/popin.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/popin.md b/ads/vendors/popin.md
index caebdad7fc58..5f20a037f259 100644
--- a/ads/vendors/popin.md
+++ b/ads/vendors/popin.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # popIn
 
 ## Display
diff --git a/ads/vendors/postquare.js b/ads/vendors/postquare.js
index 3b8858bedc20..cbb156ad92b8 100644
--- a/ads/vendors/postquare.js
+++ b/ads/vendors/postquare.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/postquare.md b/ads/vendors/postquare.md
index d6a35f0a8aca..a7c736cedd4f 100644
--- a/ads/vendors/postquare.md
+++ b/ads/vendors/postquare.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Postquare
 
 ## Example of Postquare's widget implementation
diff --git a/ads/vendors/ppstudio.js b/ads/vendors/ppstudio.js
index d719ed8d7219..de4350095058 100644
--- a/ads/vendors/ppstudio.js
+++ b/ads/vendors/ppstudio.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/ppstudio.md b/ads/vendors/ppstudio.md
index 9fea374cfa4f..237eeba180bf 100644
--- a/ads/vendors/ppstudio.md
+++ b/ads/vendors/ppstudio.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # PPStudio
 
 ## Example
diff --git a/ads/vendors/pressboard.js b/ads/vendors/pressboard.js
index f63fd010fbe2..acbeca67e447 100644
--- a/ads/vendors/pressboard.js
+++ b/ads/vendors/pressboard.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/pressboard.md b/ads/vendors/pressboard.md
index 69986fcae8bf..2b8d5a25eb22 100644
--- a/ads/vendors/pressboard.md
+++ b/ads/vendors/pressboard.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Pressboard
 
 ## Example
diff --git a/ads/vendors/promoteiq.js b/ads/vendors/promoteiq.js
index a800a5b35530..55fbab393580 100644
--- a/ads/vendors/promoteiq.js
+++ b/ads/vendors/promoteiq.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 import {parseJson} from '#core/types/object/json';
 import {user} from '../../src/log';
diff --git a/ads/vendors/pubexchange.js b/ads/vendors/pubexchange.js
index e2bf66f8a70f..f9e830d311a0 100644
--- a/ads/vendors/pubexchange.js
+++ b/ads/vendors/pubexchange.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/pubexchange.md b/ads/vendors/pubexchange.md
index b60d05c943b3..885a9beffeb1 100644
--- a/ads/vendors/pubexchange.md
+++ b/ads/vendors/pubexchange.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # PubExchange
 
 ## Example
diff --git a/ads/vendors/pubguru.js b/ads/vendors/pubguru.js
index d45581a87f6d..d198ffc36acc 100644
--- a/ads/vendors/pubguru.js
+++ b/ads/vendors/pubguru.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/pubguru.md b/ads/vendors/pubguru.md
index d621db0ecb65..1f0b877cfec5 100644
--- a/ads/vendors/pubguru.md
+++ b/ads/vendors/pubguru.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # PubGuru
 
 ## Examples
diff --git a/ads/vendors/pubmine.js b/ads/vendors/pubmine.js
index 4e92c9957bdc..f228b6d4ca22 100644
--- a/ads/vendors/pubmine.js
+++ b/ads/vendors/pubmine.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CONSENT_POLICY_STATE} from '#core/constants/consent-state';
 import {loadScript, validateData} from '#3p/3p';
 
diff --git a/ads/vendors/pubmine.md b/ads/vendors/pubmine.md
index b9f56d73ff8e..ff6f99df3b57 100644
--- a/ads/vendors/pubmine.md
+++ b/ads/vendors/pubmine.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Pubmine
 
 ## Example
diff --git a/ads/vendors/puffnetwork.js b/ads/vendors/puffnetwork.js
index 2e21b8993cfd..6c608097b8db 100644
--- a/ads/vendors/puffnetwork.js
+++ b/ads/vendors/puffnetwork.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/pulse.js b/ads/vendors/pulse.js
index e9d650d44ca0..ff43bce7d0e6 100644
--- a/ads/vendors/pulse.js
+++ b/ads/vendors/pulse.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/pulse.md b/ads/vendors/pulse.md
index c192b52115a1..05dc1c80f5fa 100644
--- a/ads/vendors/pulse.md
+++ b/ads/vendors/pulse.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Pulse
 
 ## Example
diff --git a/ads/vendors/pulsepoint.js b/ads/vendors/pulsepoint.js
index 586830c76e40..70fec83e513c 100644
--- a/ads/vendors/pulsepoint.js
+++ b/ads/vendors/pulsepoint.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {doubleclick} from '#ads/google/doubleclick';
 import {loadScript, validateData, writeScript} from '#3p/3p';
 
diff --git a/ads/vendors/purch.js b/ads/vendors/purch.js
index 58f26f993764..5ce828de5c05 100644
--- a/ads/vendors/purch.js
+++ b/ads/vendors/purch.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, validateSrcPrefix, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/purch.md b/ads/vendors/purch.md
index b14768de99ac..bc16b67bf78b 100644
--- a/ads/vendors/purch.md
+++ b/ads/vendors/purch.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Purch
 
 ## Example
diff --git a/ads/vendors/quoraad.js b/ads/vendors/quoraad.js
index dac0cf54e0af..8da1d19d486a 100644
--- a/ads/vendors/quoraad.js
+++ b/ads/vendors/quoraad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/quoraad.md b/ads/vendors/quoraad.md
index 7f0c6af75d7f..45342aff9a91 100644
--- a/ads/vendors/quoraad.md
+++ b/ads/vendors/quoraad.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Quora
 
 ## Example
diff --git a/ads/vendors/rakutenunifiedads.js b/ads/vendors/rakutenunifiedads.js
index 69887487f651..9f3543973a62 100644
--- a/ads/vendors/rakutenunifiedads.js
+++ b/ads/vendors/rakutenunifiedads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {hasOwn} from '#core/types/object';
 import {validateData, writeScript} from '#3p/3p';
 
diff --git a/ads/vendors/rbinfox.js b/ads/vendors/rbinfox.js
index e7147a54545e..a1836a82ba1f 100644
--- a/ads/vendors/rbinfox.js
+++ b/ads/vendors/rbinfox.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {loadScript, validateData, validateSrcPrefix} from '#3p/3p';
 
 const jsnPrefix = 'https://rb.infox.sg/';
diff --git a/ads/vendors/rbinfox.md b/ads/vendors/rbinfox.md
index efee0c8e3345..7ae48e7c4990 100644
--- a/ads/vendors/rbinfox.md
+++ b/ads/vendors/rbinfox.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Rb.Infox.SG
 
 ## Example
diff --git a/ads/vendors/rcmwidget.js b/ads/vendors/rcmwidget.js
index 77d4a357591f..dfefcea6aaaf 100644
--- a/ads/vendors/rcmwidget.js
+++ b/ads/vendors/rcmwidget.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 const WIDGET_DEFAULT_NODE_ID = 'rcm-widget';
diff --git a/ads/vendors/rcmwidget.md b/ads/vendors/rcmwidget.md
index 3a8e7fdcf2b7..1801c53a5c8e 100644
--- a/ads/vendors/rcmwidget.md
+++ b/ads/vendors/rcmwidget.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Rcmwidget
 
 ## Example
diff --git a/ads/vendors/readmo.js b/ads/vendors/readmo.js
index b4e33fcb49de..cf920becb2e9 100644
--- a/ads/vendors/readmo.js
+++ b/ads/vendors/readmo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/readmo.md b/ads/vendors/readmo.md
index 310acea1a1a1..126070682f29 100644
--- a/ads/vendors/readmo.md
+++ b/ads/vendors/readmo.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # ReadMo
 
 ## Example
diff --git a/ads/vendors/realclick.js b/ads/vendors/realclick.js
index c0770984074c..f9b893878b0e 100644
--- a/ads/vendors/realclick.js
+++ b/ads/vendors/realclick.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/realclick.md b/ads/vendors/realclick.md
index 803ad613c76f..93fd253a5b9b 100644
--- a/ads/vendors/realclick.md
+++ b/ads/vendors/realclick.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Realclick
 
 ## Example
diff --git a/ads/vendors/recomad.js b/ads/vendors/recomad.js
index 2ce96da8d12b..4fd98c39863b 100644
--- a/ads/vendors/recomad.js
+++ b/ads/vendors/recomad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/recomad.md b/ads/vendors/recomad.md
index d168a5133ac9..ba82629f99ba 100644
--- a/ads/vendors/recomad.md
+++ b/ads/vendors/recomad.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # recomAD widget
 
 This `<amp-ad>` tag contains a widget called
diff --git a/ads/vendors/recreativ.js b/ads/vendors/recreativ.js
index 07b8eda4d1e4..09edee96053b 100644
--- a/ads/vendors/recreativ.js
+++ b/ads/vendors/recreativ.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/recreativ.md b/ads/vendors/recreativ.md
index c9a2ddc7bf07..e4d6f98840aa 100644
--- a/ads/vendors/recreativ.md
+++ b/ads/vendors/recreativ.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Recreativ
 
 Provides support for [Recreativ](https://recreativ.com/) widgets.
diff --git a/ads/vendors/relap.js b/ads/vendors/relap.js
index 7aeb130190a1..575b8379d57e 100644
--- a/ads/vendors/relap.js
+++ b/ads/vendors/relap.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/relap.md b/ads/vendors/relap.md
index 72f590a1d031..d7cf5bb74a5d 100644
--- a/ads/vendors/relap.md
+++ b/ads/vendors/relap.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Relap
 
 ## Example
diff --git a/ads/vendors/relappro.js b/ads/vendors/relappro.js
index 04fe4339bf17..955f73ea610e 100644
--- a/ads/vendors/relappro.js
+++ b/ads/vendors/relappro.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/relappro.md b/ads/vendors/relappro.md
index d92edcd8e3ca..00fb03c96bcf 100644
--- a/ads/vendors/relappro.md
+++ b/ads/vendors/relappro.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Relap
 
 ## Example
diff --git a/ads/vendors/remixd.md b/ads/vendors/remixd.md
index 30fd3d26c118..7a85f4031bd2 100644
--- a/ads/vendors/remixd.md
+++ b/ads/vendors/remixd.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Remixd
 
 ## Example
diff --git a/ads/vendors/revcontent.js b/ads/vendors/revcontent.js
index f971177d2546..68981da1610b 100644
--- a/ads/vendors/revcontent.js
+++ b/ads/vendors/revcontent.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/revcontent.md b/ads/vendors/revcontent.md
index 1570c8318a8d..4b313313ce6a 100644
--- a/ads/vendors/revcontent.md
+++ b/ads/vendors/revcontent.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Revcontent
 
 ## Example
diff --git a/ads/vendors/revjet.js b/ads/vendors/revjet.js
index ac8da440eaf1..08c3964324b1 100644
--- a/ads/vendors/revjet.js
+++ b/ads/vendors/revjet.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/revjet.md b/ads/vendors/revjet.md
index a85fa6429611..ccfd0f824dd8 100644
--- a/ads/vendors/revjet.md
+++ b/ads/vendors/revjet.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # RevJet
 
 Serves ads from the [RevJet Marketing Creative Platform](https://www.revjet.com/).
diff --git a/ads/vendors/rfp.js b/ads/vendors/rfp.js
index 0103108ca10d..7ca4ad16a67b 100644
--- a/ads/vendors/rfp.js
+++ b/ads/vendors/rfp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/rfp.md b/ads/vendors/rfp.md
index ee76efebe230..720dcf5bbe3f 100644
--- a/ads/vendors/rfp.md
+++ b/ads/vendors/rfp.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Red for Publishers
 
 ## Example
diff --git a/ads/vendors/rnetplus.js b/ads/vendors/rnetplus.js
index f7c50fcf2a4d..4974a07f8776 100644
--- a/ads/vendors/rnetplus.js
+++ b/ads/vendors/rnetplus.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData, validateSrcPrefix} from '#3p/3p';
 
 const jsnPrefix = 'https://api.rnet.plus/';
diff --git a/ads/vendors/rnetplus.md b/ads/vendors/rnetplus.md
index 26bc61bcd33f..ceda11d014a4 100644
--- a/ads/vendors/rnetplus.md
+++ b/ads/vendors/rnetplus.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # RnetPlus
 
 Provides support for [rnetplus](https://admin.rnet.plus/help/) Rambler&Co RNetPlus.
diff --git a/ads/vendors/rubicon.js b/ads/vendors/rubicon.js
index dd2ba4a78465..1928411ce5c1 100644
--- a/ads/vendors/rubicon.js
+++ b/ads/vendors/rubicon.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/rubicon.md b/ads/vendors/rubicon.md
index be67d9ff3150..d73aa42147db 100644
--- a/ads/vendors/rubicon.md
+++ b/ads/vendors/rubicon.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Rubicon Project
 
 If you want to serve ads via your Ad Server then there is no need to use the adapter when using Smart Tags. These can simply be served via your Ad Server in the normal fashion. You simply need to ensure that you are using secure tags (https).
diff --git a/ads/vendors/runative.js b/ads/vendors/runative.js
index 0e2a5cc99f6a..d42d182581de 100644
--- a/ads/vendors/runative.js
+++ b/ads/vendors/runative.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 import {parseJson} from '#core/types/object/json';
 
diff --git a/ads/vendors/runative.md b/ads/vendors/runative.md
index 7464ff81909b..096dec3070e7 100644
--- a/ads/vendors/runative.md
+++ b/ads/vendors/runative.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # RUNative
 
 Serves ads from the [RUNative](https://www.runative.com/).
diff --git a/ads/vendors/sas.js b/ads/vendors/sas.js
index 814878dd4e38..a2b0aa992f67 100644
--- a/ads/vendors/sas.js
+++ b/ads/vendors/sas.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getMultiSizeDimensions} from '#ads/google/utils';
 import {parseJson} from '#core/types/object/json';
 import {validateData, writeScript} from '#3p/3p';
diff --git a/ads/vendors/sas.md b/ads/vendors/sas.md
index b549fdc94b11..cd8b1bc880d0 100644
--- a/ads/vendors/sas.md
+++ b/ads/vendors/sas.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # SAS CI 360 Match
 
 ## Example
diff --git a/ads/vendors/seedingalliance.js b/ads/vendors/seedingalliance.js
index 3af775740163..104c8443ce93 100644
--- a/ads/vendors/seedingalliance.js
+++ b/ads/vendors/seedingalliance.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/seedingalliance.md b/ads/vendors/seedingalliance.md
index 9516a3d8cdf3..5d78b7d92b93 100644
--- a/ads/vendors/seedingalliance.md
+++ b/ads/vendors/seedingalliance.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Seeding Alliance
 
 ​
diff --git a/ads/vendors/sekindo.js b/ads/vendors/sekindo.js
index d06ab724394f..3d950ca8e803 100644
--- a/ads/vendors/sekindo.js
+++ b/ads/vendors/sekindo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {hasOwn} from '#core/types/object';
 import {loadScript, validateData} from '#3p/3p';
 
diff --git a/ads/vendors/sekindo.md b/ads/vendors/sekindo.md
index 2cec7b3c1559..0fe07f6d05a8 100644
--- a/ads/vendors/sekindo.md
+++ b/ads/vendors/sekindo.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Sekindo
 
 ## Example
diff --git a/ads/vendors/sharethrough.js b/ads/vendors/sharethrough.js
index 6cf42c66fce2..fd44900cca57 100644
--- a/ads/vendors/sharethrough.js
+++ b/ads/vendors/sharethrough.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/sharethrough.md b/ads/vendors/sharethrough.md
index 2d5e7dc3980f..3a87006cc282 100644
--- a/ads/vendors/sharethrough.md
+++ b/ads/vendors/sharethrough.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Sharethrough
 
 ## Example
diff --git a/ads/vendors/shemedia.js b/ads/vendors/shemedia.js
index 8cd094bd7641..6f6d9381d8e5 100644
--- a/ads/vendors/shemedia.js
+++ b/ads/vendors/shemedia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/shemedia.md b/ads/vendors/shemedia.md
index bc58eef22683..5102304f05f8 100644
--- a/ads/vendors/shemedia.md
+++ b/ads/vendors/shemedia.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # SHE Media
 
 Your site must be an active member of the [SHE Media Partner Network](http://www.shemedia.com). Please contact [Support](mailto:support@shemedia.com) for specific tags for your site and information on configuration semantics.
diff --git a/ads/vendors/slimcutmedia.js b/ads/vendors/slimcutmedia.js
index e7f60cdc1756..b20ee8957f46 100644
--- a/ads/vendors/slimcutmedia.js
+++ b/ads/vendors/slimcutmedia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/slimcutmedia.md b/ads/vendors/slimcutmedia.md
index 3258d07aeb36..65ce9864946f 100644
--- a/ads/vendors/slimcutmedia.md
+++ b/ads/vendors/slimcutmedia.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # SlimCut Media
 
 ## Example
diff --git a/ads/vendors/smartadserver.js b/ads/vendors/smartadserver.js
index d004b386da8e..fc27c18b698f 100644
--- a/ads/vendors/smartadserver.js
+++ b/ads/vendors/smartadserver.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/smartadserver.md b/ads/vendors/smartadserver.md
index 68e8a99d12fa..c8c871e7911b 100644
--- a/ads/vendors/smartadserver.md
+++ b/ads/vendors/smartadserver.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # SmartAdServer
 
 ## Example
diff --git a/ads/vendors/smartclip.js b/ads/vendors/smartclip.js
index b495efde999b..7061a79c79ba 100644
--- a/ads/vendors/smartclip.js
+++ b/ads/vendors/smartclip.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/smartclip.md b/ads/vendors/smartclip.md
index 5d044049534e..4f63a6fffa59 100644
--- a/ads/vendors/smartclip.md
+++ b/ads/vendors/smartclip.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # smartclip
 
 ## Example
diff --git a/ads/vendors/smi2.js b/ads/vendors/smi2.js
index 1d0f00b6510d..c78108d63471 100644
--- a/ads/vendors/smi2.js
+++ b/ads/vendors/smi2.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/smi2.md b/ads/vendors/smi2.md
index c7151529da80..902791ed376b 100644
--- a/ads/vendors/smi2.md
+++ b/ads/vendors/smi2.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Smi2
 
 SMI2 is a service for personalizing content network. Please visit our [smi2.net](https://smi2.net) for more information.
diff --git a/ads/vendors/smilewanted.js b/ads/vendors/smilewanted.js
index e5c1168c43d4..97bd0d2cad8e 100644
--- a/ads/vendors/smilewanted.js
+++ b/ads/vendors/smilewanted.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/smilewanted.md b/ads/vendors/smilewanted.md
index af029c2e550f..dd28272bc9b1 100644
--- a/ads/vendors/smilewanted.md
+++ b/ads/vendors/smilewanted.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # SmileWanted
 
 ## Example
diff --git a/ads/vendors/sogouad.js b/ads/vendors/sogouad.js
index 95db8d82d835..514d8dc4df00 100644
--- a/ads/vendors/sogouad.js
+++ b/ads/vendors/sogouad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/sogouad.md b/ads/vendors/sogouad.md
index 50db68fa2c3b..252e70acd473 100644
--- a/ads/vendors/sogouad.md
+++ b/ads/vendors/sogouad.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Sogou
 
 ## Examples
diff --git a/ads/vendors/sona.js b/ads/vendors/sona.js
index 9e6c65df7836..c5d00220d628 100644
--- a/ads/vendors/sona.js
+++ b/ads/vendors/sona.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 import {parseJson} from '#core/types/object/json';
 
diff --git a/ads/vendors/sona.md b/ads/vendors/sona.md
index 982eed75a3b6..cd288f124575 100644
--- a/ads/vendors/sona.md
+++ b/ads/vendors/sona.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Sona
 
 ## Examples
diff --git a/ads/vendors/sortable.js b/ads/vendors/sortable.js
index 3f11dd46b7d7..1a2872f690e3 100644
--- a/ads/vendors/sortable.js
+++ b/ads/vendors/sortable.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/sortable.md b/ads/vendors/sortable.md
index d6eb418e4ccc..2b715add712d 100644
--- a/ads/vendors/sortable.md
+++ b/ads/vendors/sortable.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Sortable
 
 ## Examples
diff --git a/ads/vendors/sovrn.js b/ads/vendors/sovrn.js
index d8544a50bfc1..52d3d954c7f9 100644
--- a/ads/vendors/sovrn.js
+++ b/ads/vendors/sovrn.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 /*
  *********
  * Existing sovrn customers feel free to contact amp-implementations@sovrn.com
diff --git a/ads/vendors/speakol.js b/ads/vendors/speakol.js
index 09584da5f8ba..709e0cfe0f7b 100644
--- a/ads/vendors/speakol.js
+++ b/ads/vendors/speakol.js
@@ -1,19 +1,4 @@
 /* eslint-disable require-jsdoc */
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 
 import {loadScript, validateData} from '#3p/3p';
 
diff --git a/ads/vendors/speakol.md b/ads/vendors/speakol.md
index db9f891ae43b..784035c86516 100644
--- a/ads/vendors/speakol.md
+++ b/ads/vendors/speakol.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Speakol
 
 Speakol support for AMP.
diff --git a/ads/vendors/spotx.js b/ads/vendors/spotx.js
index 533d132bc308..bdb5d6a8e8b6 100644
--- a/ads/vendors/spotx.js
+++ b/ads/vendors/spotx.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {hasOwn} from '#core/types/object';
 import {validateData} from '#3p/3p';
 
diff --git a/ads/vendors/spotx.md b/ads/vendors/spotx.md
index 3cef336af976..b9773a44b298 100644
--- a/ads/vendors/spotx.md
+++ b/ads/vendors/spotx.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # SpotX
 
 ## Example
diff --git a/ads/vendors/springAds.js b/ads/vendors/springAds.js
index 98c3a10c5c6c..efd0115a3d35 100644
--- a/ads/vendors/springAds.js
+++ b/ads/vendors/springAds.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {computeInMasterFrame, loadScript} from '#3p/3p';
 import {parseJson} from '#core/types/object/json';
 
diff --git a/ads/vendors/springAds.md b/ads/vendors/springAds.md
index 8a697633b87b..17316781396a 100644
--- a/ads/vendors/springAds.md
+++ b/ads/vendors/springAds.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Spring AdTechnology
 
 ## Example
diff --git a/ads/vendors/strossle.js b/ads/vendors/strossle.js
index 3a9e005bd263..7eaddcf769ea 100644
--- a/ads/vendors/strossle.js
+++ b/ads/vendors/strossle.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 const renderTo = 'strossle-widget';
diff --git a/ads/vendors/strossle.md b/ads/vendors/strossle.md
index d2a1f030a58b..c5b3e9b21a8d 100644
--- a/ads/vendors/strossle.md
+++ b/ads/vendors/strossle.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Strossle
 
 Strossle provides technologies and revenue drivers helping publishers monetize the true value of their content. We use machine learning to match the right users with the right content, presented as best in class recommendations. You benefit from more engaged users and multitude of options to grow revenues from advertising and paid content. Please visit our [strossle.com](https://strossle.com) for more information.
diff --git a/ads/vendors/sulvo.js b/ads/vendors/sulvo.js
index d1028543767c..8bc1e86fbb8f 100644
--- a/ads/vendors/sulvo.js
+++ b/ads/vendors/sulvo.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {loadScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/sunmedia.js b/ads/vendors/sunmedia.js
index 216f220c9345..3f27e55bb1d1 100644
--- a/ads/vendors/sunmedia.js
+++ b/ads/vendors/sunmedia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/sunmedia.md b/ads/vendors/sunmedia.md
index 41b2953263be..cfff4ed59b01 100644
--- a/ads/vendors/sunmedia.md
+++ b/ads/vendors/sunmedia.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # SunMedia
 
 ## Example
diff --git a/ads/vendors/svknative.js b/ads/vendors/svknative.js
index 54909ec90b46..eec95603820a 100644
--- a/ads/vendors/svknative.js
+++ b/ads/vendors/svknative.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/svknative.md b/ads/vendors/svknative.md
index 99c6357dc6d4..cdbcc0dfc37f 100644
--- a/ads/vendors/svknative.md
+++ b/ads/vendors/svknative.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # SVK Native
 
 SVK Native is a content discovery platform. Please visit our [svk-native.ru](https://svk-native.ru) for more information.
diff --git a/ads/vendors/swoop.js b/ads/vendors/swoop.js
index 2023198fd924..0fa216bccf6e 100644
--- a/ads/vendors/swoop.js
+++ b/ads/vendors/swoop.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {computeInMasterFrame, loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/swoop.md b/ads/vendors/swoop.md
index 54fe3e6c113a..9a450bacac0a 100644
--- a/ads/vendors/swoop.md
+++ b/ads/vendors/swoop.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Swoop
 
 ## Example
diff --git a/ads/vendors/taboola.js b/ads/vendors/taboola.js
index 4654e492a4fb..309b69c52081 100644
--- a/ads/vendors/taboola.js
+++ b/ads/vendors/taboola.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/taboola.md b/ads/vendors/taboola.md
index 715a1825d673..665701d1915a 100644
--- a/ads/vendors/taboola.md
+++ b/ads/vendors/taboola.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Taboola
 
 ## Example
diff --git a/ads/vendors/tagon.js b/ads/vendors/tagon.js
index bdae53799e34..bf6ff0309d94 100644
--- a/ads/vendors/tagon.js
+++ b/ads/vendors/tagon.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/tagon.md b/ads/vendors/tagon.md
index dbd18645ec36..8c4c160392a4 100644
--- a/ads/vendors/tagon.md
+++ b/ads/vendors/tagon.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Tagon
 
 ## Example
diff --git a/ads/vendors/tail.js b/ads/vendors/tail.js
index b4aff1cc8f9d..c146cc155941 100644
--- a/ads/vendors/tail.js
+++ b/ads/vendors/tail.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/tail.md b/ads/vendors/tail.md
index 4d27ca33af23..65156d75d5cb 100644
--- a/ads/vendors/tail.md
+++ b/ads/vendors/tail.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Tail
 
 How to use AMP data to create, serve ads and create personalized experiences on the web.
diff --git a/ads/vendors/tcsemotion.js b/ads/vendors/tcsemotion.js
index 239f2edeed25..a703d0aff94e 100644
--- a/ads/vendors/tcsemotion.js
+++ b/ads/vendors/tcsemotion.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {validateData, writeScript} from '#3p/3p';
 /**
  * @param {!Window} global
diff --git a/ads/vendors/teads.js b/ads/vendors/teads.js
index 24a52f149e1b..695cfb34a9d1 100644
--- a/ads/vendors/teads.js
+++ b/ads/vendors/teads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/teads.md b/ads/vendors/teads.md
index d335fdf95c9e..fafea92e1877 100644
--- a/ads/vendors/teads.md
+++ b/ads/vendors/teads.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Teads
 
 ## Example
diff --git a/ads/vendors/temedya.js b/ads/vendors/temedya.js
index 3ace7887f04a..fc24a8613658 100644
--- a/ads/vendors/temedya.js
+++ b/ads/vendors/temedya.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/temedya.md b/ads/vendors/temedya.md
index f41d8c0b1d3e..7eb44eba2da8 100644
--- a/ads/vendors/temedya.md
+++ b/ads/vendors/temedya.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # TE Medya
 
 ## Example of TE Medya's widget implementation
diff --git a/ads/vendors/torimochi.js b/ads/vendors/torimochi.js
index d29644ea6488..e57f4a2a353c 100644
--- a/ads/vendors/torimochi.js
+++ b/ads/vendors/torimochi.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseJson} from '#core/types/object/json';
 import {validateData, writeScript} from '#3p/3p';
 
diff --git a/ads/vendors/torimochi.md b/ads/vendors/torimochi.md
index ace3227abd9e..c273b4fb49b2 100644
--- a/ads/vendors/torimochi.md
+++ b/ads/vendors/torimochi.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Torimochi
 
 ## Example
diff --git a/ads/vendors/tracdelight.js b/ads/vendors/tracdelight.js
index 8e1ffa3c9ad7..4e7c11fa09a1 100644
--- a/ads/vendors/tracdelight.js
+++ b/ads/vendors/tracdelight.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/tracdelight.md b/ads/vendors/tracdelight.md
index 04f9a55f0135..edd9ed102a94 100644
--- a/ads/vendors/tracdelight.md
+++ b/ads/vendors/tracdelight.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # tracdelight
 
 ## Example
diff --git a/ads/vendors/triplelift.js b/ads/vendors/triplelift.js
index 11f7bdb6e5ce..dbfc6dd4070a 100644
--- a/ads/vendors/triplelift.js
+++ b/ads/vendors/triplelift.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateSrcPrefix} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/triplelift.md b/ads/vendors/triplelift.md
index 3fca1effce99..40aeffec5789 100644
--- a/ads/vendors/triplelift.md
+++ b/ads/vendors/triplelift.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # TripleLift
 
 ## Example
diff --git a/ads/vendors/trugaze.js b/ads/vendors/trugaze.js
index 8bd43e273e07..6b275f8f5cae 100644
--- a/ads/vendors/trugaze.js
+++ b/ads/vendors/trugaze.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/trugaze.md b/ads/vendors/trugaze.md
index b6c82a89dcdc..0b050dc32818 100644
--- a/ads/vendors/trugaze.md
+++ b/ads/vendors/trugaze.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Trugaze
 
 ## Example
diff --git a/ads/vendors/ucfunnel.js b/ads/vendors/ucfunnel.js
index 92f9bc4eb92f..9e8f7d61b8e8 100644
--- a/ads/vendors/ucfunnel.js
+++ b/ads/vendors/ucfunnel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/ucfunnel.md b/ads/vendors/ucfunnel.md
index 33bffe572559..361e21bffee3 100644
--- a/ads/vendors/ucfunnel.md
+++ b/ads/vendors/ucfunnel.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # ucfunnel
 
 ## Example
diff --git a/ads/vendors/unruly.js b/ads/vendors/unruly.js
index a119ae6cef57..b41a340311e5 100644
--- a/ads/vendors/unruly.js
+++ b/ads/vendors/unruly.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/unruly.md b/ads/vendors/unruly.md
index 1d25b3b59fb0..36dd70df9ae2 100644
--- a/ads/vendors/unruly.md
+++ b/ads/vendors/unruly.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Unruly
 
 ## Example
diff --git a/ads/vendors/uzou.js b/ads/vendors/uzou.js
index 71f8f7a30842..e7da69f3f6d5 100644
--- a/ads/vendors/uzou.js
+++ b/ads/vendors/uzou.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 import {parseJson} from '#core/types/object/json';
 
diff --git a/ads/vendors/uzou.md b/ads/vendors/uzou.md
index d36d1af9350e..1531877b34da 100644
--- a/ads/vendors/uzou.md
+++ b/ads/vendors/uzou.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # UZOU
 
 For initial installation, let us know from [this form](https://docs.google.com/forms/d/e/1FAIpQLSdq18-oOnVZNuJG2pAAzMyjyfCVU69RryUJWwjwMbYLkOY4Zg/viewform).
diff --git a/ads/vendors/valuecommerce.js b/ads/vendors/valuecommerce.js
index 00289f02b149..3ac3e59b6015 100644
--- a/ads/vendors/valuecommerce.js
+++ b/ads/vendors/valuecommerce.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/valuecommerce.md b/ads/vendors/valuecommerce.md
index 185ed5bcef49..c8f492598190 100644
--- a/ads/vendors/valuecommerce.md
+++ b/ads/vendors/valuecommerce.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Valuecommerce
 
 ## Example
diff --git a/ads/vendors/vdoai.js b/ads/vendors/vdoai.js
index 96e352e6e3f5..d97c31da156a 100644
--- a/ads/vendors/vdoai.js
+++ b/ads/vendors/vdoai.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript} from '#3p/3p';
 /**
  * @param {!Window} global
diff --git a/ads/vendors/vdoai.md b/ads/vendors/vdoai.md
index 5e3a981381c6..57cdac23c680 100644
--- a/ads/vendors/vdoai.md
+++ b/ads/vendors/vdoai.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # VDO.AI
 
 ## Example
diff --git a/ads/vendors/verizonmedia.js b/ads/vendors/verizonmedia.js
index 6abe96f1d87c..aaa118535f74 100644
--- a/ads/vendors/verizonmedia.js
+++ b/ads/vendors/verizonmedia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 /**
  * @param {!Window} global
diff --git a/ads/vendors/verizonmedia.md b/ads/vendors/verizonmedia.md
index b02b685ba2fa..46c6334fa1b6 100644
--- a/ads/vendors/verizonmedia.md
+++ b/ads/vendors/verizonmedia.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # VerizonMedia
 
 ## Example
diff --git a/ads/vendors/videointelligence.js b/ads/vendors/videointelligence.js
index a04f45582609..a55871a595cc 100644
--- a/ads/vendors/videointelligence.js
+++ b/ads/vendors/videointelligence.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/videointelligence.md b/ads/vendors/videointelligence.md
index f13825949857..2df38ae10334 100644
--- a/ads/vendors/videointelligence.md
+++ b/ads/vendors/videointelligence.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # video intelligence
 
 ## Example
diff --git a/ads/vendors/videonow.js b/ads/vendors/videonow.js
index f8ac93888996..74c0f770c04e 100644
--- a/ads/vendors/videonow.js
+++ b/ads/vendors/videonow.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 import {parseJson} from '#core/types/object/json';
 import {tryDecodeUriComponent} from '#core/types/string/url';
diff --git a/ads/vendors/videonow.md b/ads/vendors/videonow.md
index a8b9db776b77..9c34f4264532 100644
--- a/ads/vendors/videonow.md
+++ b/ads/vendors/videonow.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # VideoNow
 
 ## Example
diff --git a/ads/vendors/viralize.js b/ads/vendors/viralize.js
index a9ae73b2896d..e39abc1621d2 100644
--- a/ads/vendors/viralize.js
+++ b/ads/vendors/viralize.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {addParamsToUrl} from '../../src/url';
 import {loadScript, validateData} from '#3p/3p';
 import {parseJson} from '#core/types/object/json';
diff --git a/ads/vendors/viralize.md b/ads/vendors/viralize.md
index 698ec2b882b8..37d1583fdf99 100644
--- a/ads/vendors/viralize.md
+++ b/ads/vendors/viralize.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Viralize
 
 ## Example
diff --git a/ads/vendors/vlyby.js b/ads/vendors/vlyby.js
index 3727777efe6d..77aaf41e7255 100644
--- a/ads/vendors/vlyby.js
+++ b/ads/vendors/vlyby.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 /* eslint-disable require-jsdoc */
 import {validateData} from '#3p/3p';
 
diff --git a/ads/vendors/vlyby.md b/ads/vendors/vlyby.md
index 5cc9ab9b1cf8..5afcbeacb068 100644
--- a/ads/vendors/vlyby.md
+++ b/ads/vendors/vlyby.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # vlyby
 
 ## Example
diff --git a/ads/vendors/vmfive.js b/ads/vendors/vmfive.js
index b80cec18cf2a..0c50b6cf42c8 100644
--- a/ads/vendors/vmfive.js
+++ b/ads/vendors/vmfive.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/vmfive.md b/ads/vendors/vmfive.md
index de86731012c6..a6a36d589289 100644
--- a/ads/vendors/vmfive.md
+++ b/ads/vendors/vmfive.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # VMFIve
 
 ## Example
diff --git a/ads/vendors/webediads.js b/ads/vendors/webediads.js
index b61ca135229d..635ddac273ae 100644
--- a/ads/vendors/webediads.js
+++ b/ads/vendors/webediads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/webediads.md b/ads/vendors/webediads.md
index 96072c2827b6..e6225292baac 100644
--- a/ads/vendors/webediads.md
+++ b/ads/vendors/webediads.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Webedia Adserver
 
 Private ad system deployed for all Webedia websites.
diff --git a/ads/vendors/weborama.js b/ads/vendors/weborama.js
index b18fdc019f30..4489d5a88c42 100644
--- a/ads/vendors/weborama.js
+++ b/ads/vendors/weborama.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/weborama.md b/ads/vendors/weborama.md
index 10b7fd4a987e..5aeda6a283ed 100644
--- a/ads/vendors/weborama.md
+++ b/ads/vendors/weborama.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Weborama
 
 ## Example
diff --git a/ads/vendors/whopainfeed.js b/ads/vendors/whopainfeed.js
index 4c41ab66b844..55a10ab671f9 100644
--- a/ads/vendors/whopainfeed.js
+++ b/ads/vendors/whopainfeed.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/whopainfeed.md b/ads/vendors/whopainfeed.md
index 18e968d52bf9..3c0ac41761e5 100644
--- a/ads/vendors/whopainfeed.md
+++ b/ads/vendors/whopainfeed.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Whopa InFeed
 
 ## Example installation of the InFeed widget
diff --git a/ads/vendors/widespace.js b/ads/vendors/widespace.js
index e637b6ebb9d8..65eda14564a3 100644
--- a/ads/vendors/widespace.js
+++ b/ads/vendors/widespace.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/widespace.md b/ads/vendors/widespace.md
index 95590e94e83d..4da9524e2c52 100644
--- a/ads/vendors/widespace.md
+++ b/ads/vendors/widespace.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Widespace
 
 ## Examples
diff --git a/ads/vendors/wisteria.js b/ads/vendors/wisteria.js
index 1d85395a2957..0a534eed531b 100644
--- a/ads/vendors/wisteria.js
+++ b/ads/vendors/wisteria.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/wisteria.md b/ads/vendors/wisteria.md
index 949eb3c472f2..f01f91f45bf8 100644
--- a/ads/vendors/wisteria.md
+++ b/ads/vendors/wisteria.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Wisteria
 
 ## Example
diff --git a/ads/vendors/wpmedia.js b/ads/vendors/wpmedia.js
index 5397fd387962..114070fb9113 100644
--- a/ads/vendors/wpmedia.js
+++ b/ads/vendors/wpmedia.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/wpmedia.md b/ads/vendors/wpmedia.md
index d1a48e9ff3cd..60db68f03644 100644
--- a/ads/vendors/wpmedia.md
+++ b/ads/vendors/wpmedia.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # WP Media (Wirtualna Polska)
 
 ## Examples
diff --git a/ads/vendors/wunderkind.js b/ads/vendors/wunderkind.js
index 5f988bbc07ac..74d4e146544e 100644
--- a/ads/vendors/wunderkind.js
+++ b/ads/vendors/wunderkind.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/wunderkind.md b/ads/vendors/wunderkind.md
index 1dbe7b543809..eb1404502477 100644
--- a/ads/vendors/wunderkind.md
+++ b/ads/vendors/wunderkind.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Wunderkind (formerly BounceX)
 
 ## Examples
diff --git a/ads/vendors/xlift.js b/ads/vendors/xlift.js
index 73f9fa757480..05bc24bada72 100644
--- a/ads/vendors/xlift.js
+++ b/ads/vendors/xlift.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/xlift.md b/ads/vendors/xlift.md
index 9c80e466fe38..680be67b8dbe 100644
--- a/ads/vendors/xlift.md
+++ b/ads/vendors/xlift.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Xlift
 
 ## Example
diff --git a/ads/vendors/yahoo.js b/ads/vendors/yahoo.js
index 9cd96e525947..6cf3d361a775 100644
--- a/ads/vendors/yahoo.js
+++ b/ads/vendors/yahoo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/yahoofedads.js b/ads/vendors/yahoofedads.js
index c83cb981b692..41f0bc8bf394 100644
--- a/ads/vendors/yahoofedads.js
+++ b/ads/vendors/yahoofedads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/yahoofedads.md b/ads/vendors/yahoofedads.md
index da639216ba8d..31baa1230352 100644
--- a/ads/vendors/yahoofedads.md
+++ b/ads/vendors/yahoofedads.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Yahoo Native-Display Ads Federation
 
 ## Example
diff --git a/ads/vendors/yahoojp.js b/ads/vendors/yahoojp.js
index d10d3af20458..0d8edfff7be1 100644
--- a/ads/vendors/yahoojp.js
+++ b/ads/vendors/yahoojp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/yahoojp.md b/ads/vendors/yahoojp.md
index 49ac9792bddb..47fc136d74c1 100644
--- a/ads/vendors/yahoojp.md
+++ b/ads/vendors/yahoojp.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Yahoo JP
 
 ## Example
diff --git a/ads/vendors/yahoonativeads.js b/ads/vendors/yahoonativeads.js
index fddc0966f062..fa4346c0fded 100644
--- a/ads/vendors/yahoonativeads.js
+++ b/ads/vendors/yahoonativeads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/yahoonativeads.md b/ads/vendors/yahoonativeads.md
index 88dafd25cd23..894f54db4e94 100644
--- a/ads/vendors/yahoonativeads.md
+++ b/ads/vendors/yahoonativeads.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Yahoo Native Ads
 
 ## Example
diff --git a/ads/vendors/yandex.js b/ads/vendors/yandex.js
index baab4f6a843b..ed351de578ab 100644
--- a/ads/vendors/yandex.js
+++ b/ads/vendors/yandex.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {loadScript, validateData} from '#3p/3p';
 
 const n = 'yandexContextAsyncCallbacks';
diff --git a/ads/vendors/yandex.md b/ads/vendors/yandex.md
index cc4a41059c1b..998370b70d56 100644
--- a/ads/vendors/yandex.md
+++ b/ads/vendors/yandex.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Yandex
 
 ## Example
diff --git a/ads/vendors/yektanet.js b/ads/vendors/yektanet.js
index ae4c2e17b2b4..ca543a6d6522 100644
--- a/ads/vendors/yektanet.js
+++ b/ads/vendors/yektanet.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/yektanet.md b/ads/vendors/yektanet.md
index 8594bf73f529..8f548b0d16ec 100644
--- a/ads/vendors/yektanet.md
+++ b/ads/vendors/yektanet.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Yektanet
 
 ## Example
diff --git a/ads/vendors/yengo.js b/ads/vendors/yengo.js
index 3c7d9e9817fa..016e05d83bc1 100644
--- a/ads/vendors/yengo.js
+++ b/ads/vendors/yengo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/yengo.md b/ads/vendors/yengo.md
index 651da4f92542..649fc5f98adf 100644
--- a/ads/vendors/yengo.md
+++ b/ads/vendors/yengo.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Yengo
 
 ## Example
diff --git a/ads/vendors/yieldbot.js b/ads/vendors/yieldbot.js
index 038b0ad7b16b..94df2f372902 100644
--- a/ads/vendors/yieldbot.js
+++ b/ads/vendors/yieldbot.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getMultiSizeDimensions} from '#ads/google/utils';
 import {loadScript, validateData} from '#3p/3p';
 import {rethrowAsync} from '#core/error';
diff --git a/ads/vendors/yieldbot.md b/ads/vendors/yieldbot.md
index 171fb9997938..fe0c99259dcf 100644
--- a/ads/vendors/yieldbot.md
+++ b/ads/vendors/yieldbot.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Yieldbot
 
 Yieldbot can be configured as a demand source by using the Real Time Config (RTC) callout vendor specification. To be a demand source, Yieldbot is configured as an `rtc-config` vendor within an `amp-ad` network tag configuration. Specific Yieldbot publisher identifier and slot name configuration is made using callout vendor substitution macros listed in the table below.
diff --git a/ads/vendors/yieldmo.js b/ads/vendors/yieldmo.js
index 515f21b3e149..a1a5621af1b3 100644
--- a/ads/vendors/yieldmo.js
+++ b/ads/vendors/yieldmo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/yieldmo.md b/ads/vendors/yieldmo.md
index 0f7145f7c712..69c118ebf06e 100644
--- a/ads/vendors/yieldmo.md
+++ b/ads/vendors/yieldmo.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Yieldmo
 
 ## Example
diff --git a/ads/vendors/yieldone.js b/ads/vendors/yieldone.js
index a9c813c05f85..7d3323ef62cb 100644
--- a/ads/vendors/yieldone.js
+++ b/ads/vendors/yieldone.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/yieldone.md b/ads/vendors/yieldone.md
index c82d63528c63..8d751f8ce3ae 100644
--- a/ads/vendors/yieldone.md
+++ b/ads/vendors/yieldone.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Yield One
 
 ## Example
diff --git a/ads/vendors/yieldpro.js b/ads/vendors/yieldpro.js
index 16ab3f5e721b..d811de5e0509 100644
--- a/ads/vendors/yieldpro.js
+++ b/ads/vendors/yieldpro.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {computeInMasterFrame, loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/yieldpro.md b/ads/vendors/yieldpro.md
index 3c6752e7b467..2689f11cd947 100644
--- a/ads/vendors/yieldpro.md
+++ b/ads/vendors/yieldpro.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # YieldPro
 
 ## Examples
diff --git a/ads/vendors/zedo.js b/ads/vendors/zedo.js
index f57fe0ff6ffc..703638f47fcc 100644
--- a/ads/vendors/zedo.js
+++ b/ads/vendors/zedo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/zen.js b/ads/vendors/zen.js
index 3c8a2d8b08a2..a9ed57b4e4b2 100644
--- a/ads/vendors/zen.js
+++ b/ads/vendors/zen.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {loadScript, validateData} from '#3p/3p';
 
 const n = 'yandexZenAsyncCallbacks';
diff --git a/ads/vendors/zen.md b/ads/vendors/zen.md
index b568d0ee9cc0..01900ae89b40 100644
--- a/ads/vendors/zen.md
+++ b/ads/vendors/zen.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Zen
 
 ## Example
diff --git a/ads/vendors/zergnet.js b/ads/vendors/zergnet.js
index b6b78157df67..66a3a994437d 100644
--- a/ads/vendors/zergnet.js
+++ b/ads/vendors/zergnet.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/zergnet.md b/ads/vendors/zergnet.md
index d0f73f768eee..bbbe7dd782f6 100644
--- a/ads/vendors/zergnet.md
+++ b/ads/vendors/zergnet.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # ZergNet
 
 ## Example
diff --git a/ads/vendors/zucks.js b/ads/vendors/zucks.js
index 1ab3c5f40136..36008b2e9253 100644
--- a/ads/vendors/zucks.js
+++ b/ads/vendors/zucks.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadScript, validateData, writeScript} from '#3p/3p';
 
 /**
diff --git a/ads/vendors/zucks.md b/ads/vendors/zucks.md
index 18c2bad6ff27..5c67d23b04d2 100644
--- a/ads/vendors/zucks.md
+++ b/ads/vendors/zucks.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Zucks
 
 ## Example
diff --git a/amp.js b/amp.js
index da7a844ac45d..edc040115d32 100755
--- a/amp.js
+++ b/amp.js
@@ -1,19 +1,4 @@
 #!/usr/bin/env node
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 
 const {
   createTask,
diff --git a/build-system/.eslintrc.js b/build-system/.eslintrc.js
index c25b3cd13e80..760a84ec1132 100644
--- a/build-system/.eslintrc.js
+++ b/build-system/.eslintrc.js
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 module.exports = {
   'env': {
diff --git a/build-system/babel-config/.eslintrc.js b/build-system/babel-config/.eslintrc.js
index 861792afd864..50668c50daa3 100644
--- a/build-system/babel-config/.eslintrc.js
+++ b/build-system/babel-config/.eslintrc.js
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 module.exports = {
   'rules': {
diff --git a/build-system/babel-config/empty-config.js b/build-system/babel-config/empty-config.js
index 37e542bc8514..7f155a096539 100644
--- a/build-system/babel-config/empty-config.js
+++ b/build-system/babel-config/empty-config.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/babel-config/eslint-config.js b/build-system/babel-config/eslint-config.js
index 00a623169a7f..9829d967a0cb 100644
--- a/build-system/babel-config/eslint-config.js
+++ b/build-system/babel-config/eslint-config.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/babel-config/helpers.js b/build-system/babel-config/helpers.js
index 9d57c76c74ff..7bb5e5fe3035 100644
--- a/build-system/babel-config/helpers.js
+++ b/build-system/babel-config/helpers.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/babel-config/import-resolver.js b/build-system/babel-config/import-resolver.js
index eeb940710b8a..dc2122adf40b 100644
--- a/build-system/babel-config/import-resolver.js
+++ b/build-system/babel-config/import-resolver.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const fs = require('fs');
diff --git a/build-system/babel-config/index.js b/build-system/babel-config/index.js
index 572ad36db3c0..d17edd56a6bc 100644
--- a/build-system/babel-config/index.js
+++ b/build-system/babel-config/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const fs = require('fs');
diff --git a/build-system/babel-config/jss-config.js b/build-system/babel-config/jss-config.js
index dc3db7e32de8..7d996ec0297c 100644
--- a/build-system/babel-config/jss-config.js
+++ b/build-system/babel-config/jss-config.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 // Babel cannot directly return a valid css file.
diff --git a/build-system/babel-config/post-closure-config.js b/build-system/babel-config/post-closure-config.js
index e3209bcb7bf5..1b06061f828a 100644
--- a/build-system/babel-config/post-closure-config.js
+++ b/build-system/babel-config/post-closure-config.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/babel-config/test-config.js b/build-system/babel-config/test-config.js
index 361ceacaf089..cb41d2c657d0 100644
--- a/build-system/babel-config/test-config.js
+++ b/build-system/babel-config/test-config.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/babel-config/unminified-config.js b/build-system/babel-config/unminified-config.js
index 6bb7145535ab..b89e42db1724 100644
--- a/build-system/babel-config/unminified-config.js
+++ b/build-system/babel-config/unminified-config.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/babel-plugins/babel-plugin-amp-mode-transformer/index.js b/build-system/babel-plugins/babel-plugin-amp-mode-transformer/index.js
index 02ef34e790a8..021c9787928f 100644
--- a/build-system/babel-plugins/babel-plugin-amp-mode-transformer/index.js
+++ b/build-system/babel-plugins/babel-plugin-amp-mode-transformer/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // @ts-nocheck
 
 /**
diff --git a/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/no-transform/input.js b/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/no-transform/input.js
index c786dcaa90b7..abab6e7e3048 100644
--- a/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/no-transform/input.js
+++ b/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/no-transform/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const test = getMode().test;
 const localDev = getMode().localDev;
 const minified = getMode().minified;
diff --git a/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/no-transform/output.js b/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/no-transform/output.js
index 94c0e9342ade..abab6e7e3048 100644
--- a/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/no-transform/output.js
+++ b/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/no-transform/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const test = getMode().test;
 const localDev = getMode().localDev;
 const minified = getMode().minified;
diff --git a/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/nomodule/input.js b/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/nomodule/input.js
index 094cba5ba364..5ed0d2a79e59 100644
--- a/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/nomodule/input.js
+++ b/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/nomodule/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import { getMode } from '../../../../../../../src/mode';
 
 const test = getMode().test;
diff --git a/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/nomodule/output.mjs b/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/nomodule/output.mjs
index 3ad2689e8c47..45d07c8f35f3 100644
--- a/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/nomodule/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/nomodule/output.mjs
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import { getMode } from '../../../../../../../src/mode';
 const test = false;
 const localDev = false;
diff --git a/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/transform/input.js b/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/transform/input.js
index a367141d0242..a09906875f74 100644
--- a/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/transform/input.js
+++ b/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/transform/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import { getMode } from '../../../../../../../src/mode';
 import * as mode from '#core/mode';
 
diff --git a/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/transform/output.mjs b/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/transform/output.mjs
index 296632e58eb7..3f3567f2cc3e 100644
--- a/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/transform/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/fixtures/transform-assertions/transform/output.mjs
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import { getMode } from '../../../../../../../src/mode';
 import * as mode from '#core/mode';
 const test = false;
diff --git a/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/index.js b/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/index.js
index 7b6d7376a749..23251129fae9 100644
--- a/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-amp-mode-transformer/test/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const runner = require('@babel/helper-plugin-test-runner').default;
 
 runner(__dirname);
diff --git a/build-system/babel-plugins/babel-plugin-const-transformer/index.js b/build-system/babel-plugins/babel-plugin-const-transformer/index.js
index c9fe348810e7..451def53e0bf 100644
--- a/build-system/babel-plugins/babel-plugin-const-transformer/index.js
+++ b/build-system/babel-plugins/babel-plugin-const-transformer/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @interface {babel.PluginPass}
  * @param {babel} babel
diff --git a/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/ignored-let/input.js b/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/ignored-let/input.js
index 58ec6a4619f2..ef04009975b5 100644
--- a/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/ignored-let/input.js
+++ b/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/ignored-let/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 let foo = true;
 let bar = 1;
 let baz = NaN;
diff --git a/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/ignored-let/output.js b/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/ignored-let/output.js
index 3b4e5eec2a88..ef04009975b5 100644
--- a/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/ignored-let/output.js
+++ b/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/ignored-let/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 let foo = true;
 let bar = 1;
 let baz = NaN;
@@ -36,4 +21,4 @@ thing: {
   let yep = 'hello';
   let another = {};
   let array = [];
-}
\ No newline at end of file
+}
diff --git a/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/ignored-var/input.js b/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/ignored-var/input.js
index 1be6fa370b5d..2f0700a9a99e 100644
--- a/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/ignored-var/input.js
+++ b/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/ignored-var/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 var foo = true;
 var bar = 1;
 var baz = NaN;
diff --git a/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/ignored-var/output.js b/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/ignored-var/output.js
index 3d40d849889c..2f0700a9a99e 100644
--- a/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/ignored-var/output.js
+++ b/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/ignored-var/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 var foo = true;
 var bar = 1;
 var baz = NaN;
diff --git a/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/should-transform/input.js b/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/should-transform/input.js
index 601818da4b0b..6ff6086c188d 100644
--- a/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/should-transform/input.js
+++ b/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/should-transform/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const foo = true;
 const bar = 1;
 const baz = NaN;
diff --git a/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/should-transform/output.js b/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/should-transform/output.js
index 3b4e5eec2a88..ef04009975b5 100644
--- a/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/should-transform/output.js
+++ b/build-system/babel-plugins/babel-plugin-const-transformer/test/fixtures/transform-assertions/should-transform/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 let foo = true;
 let bar = 1;
 let baz = NaN;
@@ -36,4 +21,4 @@ thing: {
   let yep = 'hello';
   let another = {};
   let array = [];
-}
\ No newline at end of file
+}
diff --git a/build-system/babel-plugins/babel-plugin-const-transformer/test/index.js b/build-system/babel-plugins/babel-plugin-const-transformer/test/index.js
index bb2e50c56b6a..23251129fae9 100644
--- a/build-system/babel-plugins/babel-plugin-const-transformer/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-const-transformer/test/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const runner = require('@babel/helper-plugin-test-runner').default;
 
 runner(__dirname);
diff --git a/build-system/babel-plugins/babel-plugin-imported-helpers/index.js b/build-system/babel-plugins/babel-plugin-imported-helpers/index.js
index 5bf1b6459d29..bf53e4d93e1a 100644
--- a/build-system/babel-plugins/babel-plugin-imported-helpers/index.js
+++ b/build-system/babel-plugins/babel-plugin-imported-helpers/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const {addDefault} = require('@babel/helper-module-imports');
 
 /**
diff --git a/build-system/babel-plugins/babel-plugin-imported-helpers/test/fixtures/transform-assertions/imported-helpers/input.mjs b/build-system/babel-plugins/babel-plugin-imported-helpers/test/fixtures/transform-assertions/imported-helpers/input.mjs
index f9af7488cdf3..f8e84852b8db 100644
--- a/build-system/babel-plugins/babel-plugin-imported-helpers/test/fixtures/transform-assertions/imported-helpers/input.mjs
+++ b/build-system/babel-plugins/babel-plugin-imported-helpers/test/fixtures/transform-assertions/imported-helpers/input.mjs
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const {a, b, ...c} = foo;
 const {d, e, ...f} = bar;
 
diff --git a/build-system/babel-plugins/babel-plugin-imported-helpers/test/fixtures/transform-assertions/imported-helpers/output.mjs b/build-system/babel-plugins/babel-plugin-imported-helpers/test/fixtures/transform-assertions/imported-helpers/output.mjs
index 51b767785c41..0077fdad9f04 100644
--- a/build-system/babel-plugins/babel-plugin-imported-helpers/test/fixtures/transform-assertions/imported-helpers/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-imported-helpers/test/fixtures/transform-assertions/imported-helpers/output.mjs
@@ -1,21 +1,6 @@
 import _objectSpread from "@babel/runtime/helpers/objectSpread2";
 import _objectWithoutPropertiesLoose from "@babel/runtime/helpers/objectWithoutPropertiesLoose";
 
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const _foo = foo,
       a = _foo.a,
       b = _foo.b,
diff --git a/build-system/babel-plugins/babel-plugin-imported-helpers/test/index.js b/build-system/babel-plugins/babel-plugin-imported-helpers/test/index.js
index 762295c3a9c8..23251129fae9 100644
--- a/build-system/babel-plugins/babel-plugin-imported-helpers/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-imported-helpers/test/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const runner = require('@babel/helper-plugin-test-runner').default;
 
 runner(__dirname);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/index.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/index.js
index 1e4654a5c7a1..85dc861a1ad9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // @ts-nocheck
 
 const typeMap = {
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform-user-assert/input.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform-user-assert/input.js
index 3f14b75234ca..9fe38d830f51 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform-user-assert/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform-user-assert/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 user().assert(1 + 1);
 let result = user().assert(user(), 'hello', 'world');
 let result2 = user().assert(true);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform-user-assert/output.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform-user-assert/output.js
index 3f14b75234ca..9fe38d830f51 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform-user-assert/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform-user-assert/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 user().assert(1 + 1);
 let result = user().assert(user(), 'hello', 'world');
 let result2 = user().assert(true);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform-userAssert/input.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform-userAssert/input.js
index ee9c16c73ba6..30f9cb025d60 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform-userAssert/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform-userAssert/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 userAssert(1 + 1);
 userAssert(dev().assert(2 + 2));
 userAssert();
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform-userAssert/output.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform-userAssert/output.js
index 683a7e7ebca2..ec6b5269825b 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform-userAssert/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform-userAssert/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 userAssert(1 + 1);
 userAssert(dev().assert(2 + 2));
 userAssert();
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform/input.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform/input.js
index 4833e4899415..b5dc8b6de087 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 dev().assertSomeMethod(dev());
 dev.assert(dev());
 const hello = dev().assertSomeMethod(dev());
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform/output.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform/output.js
index 4833e4899415..b5dc8b6de087 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/no-transform/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 dev().assertSomeMethod(dev());
 dev.assert(dev());
 const hello = dev().assertSomeMethod(dev());
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/preserve-parens/input.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/preserve-parens/input.js
index 0bc923d2126b..c939f06b4d45 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/preserve-parens/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/preserve-parens/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 /** @type {x} */ (dev().assertElement(dev()));
 
 function hello() {
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/preserve-parens/output.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/preserve-parens/output.js
index 12c71af8ec96..fb9a9db48405 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/preserve-parens/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/preserve-parens/output.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @type {x} */
 
 /** @type {!Element} */
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-boolean-non/input.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-boolean-non/input.js
index 7668914ba7b1..6fc5374c6e87 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-boolean-non/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-boolean-non/input.js
@@ -1,16 +1 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 dev().assertBoolean(null);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-boolean-non/output.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-boolean-non/output.js
index 66aeec4974bd..ccddc1312dc9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-boolean-non/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-boolean-non/output.js
@@ -1,18 +1,2 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @type {boolean} */
 (null);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-boolean/input.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-boolean/input.js
index 23b258faaa86..cc51ec33a868 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-boolean/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-boolean/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const falsey = false;
 dev().assertBoolean(falsey);
 dev().assertBoolean(true);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-boolean/output.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-boolean/output.js
index b0cbb07e0e9e..3a2614aa5155 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-boolean/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-boolean/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const falsey = false;
 
 /** @type {boolean} */
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-element/input.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-element/input.js
index 60d8a5251975..f0761d31ed62 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-element/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-element/input.js
@@ -1,17 +1,2 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 dev().assertElement(element);
 let result = dev().assertElement(element, 'hello', 'world');
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-element/output.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-element/output.js
index 109bfd9a52fa..acd4676f39ff 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-element/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-element/output.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @type {!Element} */
 (element);
 let result =
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-number-non/input.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-number-non/input.js
index 7e78fd300345..ba7bb1ef18ba 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-number-non/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-number-non/input.js
@@ -1,16 +1 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 dev().assertNumber(null);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-number-non/output.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-number-non/output.js
index be940bbcef05..4a50c1ed57ee 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-number-non/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-number-non/output.js
@@ -1,18 +1,2 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @type {number} */
 (null);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-number/input.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-number/input.js
index b22567373263..ababeb659caa 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-number/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-number/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 let num = 5;
 dev().assertNumber(num);
 dev().assertNumber(1 + 1);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-number/output.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-number/output.js
index f7361847231c..dd8816fcdc69 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-number/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-number/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 let num = 5;
 
 /** @type {number} */
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-string-not-string-non/input.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-string-not-string-non/input.js
index 437c670e9107..94a8e3bcd497 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-string-not-string-non/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-string-not-string-non/input.js
@@ -1,16 +1 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 dev().assertString(null);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-string-not-string-non/output.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-string-not-string-non/output.js
index d264b0ed05f4..dc302249d2d7 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-string-not-string-non/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-string-not-string-non/output.js
@@ -1,18 +1,2 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @type {string} */
 (null);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-string/input.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-string/input.js
index 7402b3c2d359..b466428cc786 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-string/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-string/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 let str = 'foo';
 dev().assertString(str);
 dev().assertString('hello');
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-string/output.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-string/output.js
index b6f4a187e125..472b7db7e0a5 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-string/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert-string/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 let str = 'foo';
 
 /** @type {string} */
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert/input.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert/input.js
index a51e7d50922f..6b3ff58cb14b 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 dev().assert(1 + 1);
 dev().assert(dev().assert(2 + 2));
 let result = dev().assert(foo, 'hello', 'world');
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert/output.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert/output.js
index a51e7d50922f..6b3ff58cb14b 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-dev-assert/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 dev().assert(1 + 1);
 dev().assert(dev().assert(2 + 2));
 let result = dev().assert(foo, 'hello', 'world');
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-empty-string/input.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-empty-string/input.js
index 0ece38875290..b727110ae5d8 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-empty-string/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-empty-string/input.js
@@ -1,16 +1 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 devAssert('');
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-empty-string/output.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-empty-string/output.js
index 0ece38875290..b727110ae5d8 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-empty-string/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-empty-string/output.js
@@ -1,16 +1 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 devAssert('');
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-false/input.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-false/input.js
index ed957dacf406..ca0fce0eb59c 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-false/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-false/input.js
@@ -1,16 +1 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 devAssert(false);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-false/output.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-false/output.js
index ed957dacf406..ca0fce0eb59c 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-false/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-false/output.js
@@ -1,16 +1 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 devAssert(false);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-null/input.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-null/input.js
index 1bac650951bc..712a3fbe6375 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-null/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-null/input.js
@@ -1,16 +1 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 devAssert(null);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-null/output.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-null/output.js
index 1bac650951bc..712a3fbe6375 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-null/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-null/output.js
@@ -1,16 +1 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 devAssert(null);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-zero/input.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-zero/input.js
index 09bca5fa5ee9..804cd240969c 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-zero/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-zero/input.js
@@ -1,16 +1 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 devAssert(0);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-zero/output.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-zero/output.js
index 09bca5fa5ee9..804cd240969c 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-zero/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert-zero/output.js
@@ -1,16 +1 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 devAssert(0);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert/input.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert/input.js
index 5b9db4a5faad..82e81ab01ca6 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 devAssert(1 + 1);
 devAssert(dev().assert(2 + 2));
 let result = devAssert(foo, 'hello', 'world');
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert/output.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert/output.js
index 3f42f0a6bccb..add768a69c7b 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/fixtures/transform-assertions/transform-devAssert/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 devAssert(1 + 1);
 devAssert(dev().assert(2 + 2));
 let result = devAssert(foo);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/index.js b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/index.js
index 7b6d7376a749..23251129fae9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-asserts/test/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const runner = require('@babel/helper-plugin-test-runner').default;
 
 runner(__dirname);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-extension-call/index.js b/build-system/babel-plugins/babel-plugin-transform-amp-extension-call/index.js
index 4d2dde099ab1..73ddbdc408fb 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-extension-call/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-extension-call/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // @ts-nocheck
 
 /**
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-extension-call/test/fixtures/transform-call/transform-simple-body/input.js b/build-system/babel-plugins/babel-plugin-transform-amp-extension-call/test/fixtures/transform-call/transform-simple-body/input.js
index f40d47cc5071..f8913925619f 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-extension-call/test/fixtures/transform-call/transform-simple-body/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-extension-call/test/fixtures/transform-call/transform-simple-body/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 AMP.extension('amp-mustache', '0.2', function(AMP) {
   AMP.registerTemplate(TAG, AmpMustache);
 });
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-extension-call/test/fixtures/transform-call/transform-simple-body/output.js b/build-system/babel-plugins/babel-plugin-transform-amp-extension-call/test/fixtures/transform-call/transform-simple-body/output.js
index be574dbfeb24..14cacea71e70 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-extension-call/test/fixtures/transform-call/transform-simple-body/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-extension-call/test/fixtures/transform-call/transform-simple-body/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 (function (AMP) {
   AMP.registerTemplate(TAG, AmpMustache);
 })(self.AMP);
diff --git a/build-system/babel-plugins/babel-plugin-transform-amp-extension-call/test/index.js b/build-system/babel-plugins/babel-plugin-transform-amp-extension-call/test/index.js
index 44564fa07fec..23251129fae9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-amp-extension-call/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-amp-extension-call/test/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const runner = require('@babel/helper-plugin-test-runner').default;
 
 runner(__dirname);
diff --git a/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/index.js b/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/index.js
index 10301ab9f0fb..e90afb0246d9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Global typedef map typedefName: typedef comment
 const TYPEDEFS = new Map();
 
diff --git a/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/fixtures/extract-annotations/emit-typedefs/input.js b/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/fixtures/extract-annotations/emit-typedefs/input.js
index 5ecec154f531..42fc36ad455b 100644
--- a/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/fixtures/extract-annotations/emit-typedefs/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/fixtures/extract-annotations/emit-typedefs/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @typedef {{
  *   viewportRect: !LayoutRectDef,
diff --git a/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/fixtures/extract-annotations/emit-typedefs/output.js b/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/fixtures/extract-annotations/emit-typedefs/output.js
index a5ef418e9e81..4a6f2852a0f8 100644
--- a/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/fixtures/extract-annotations/emit-typedefs/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/fixtures/extract-annotations/emit-typedefs/output.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**/
 
 /** @const */
diff --git a/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/fixtures/extract-annotations/remove-typedefs/input.js b/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/fixtures/extract-annotations/remove-typedefs/input.js
index a7379d37dab6..38bd9414811b 100644
--- a/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/fixtures/extract-annotations/remove-typedefs/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/fixtures/extract-annotations/remove-typedefs/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @typedef {{
  *   viewportRect: !LayoutRectDef,
diff --git a/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/fixtures/extract-annotations/remove-typedefs/output.js b/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/fixtures/extract-annotations/remove-typedefs/output.js
index 4e019c31763b..f44123285a76 100644
--- a/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/fixtures/extract-annotations/remove-typedefs/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/fixtures/extract-annotations/remove-typedefs/output.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**/
 
 /**
diff --git a/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/index.js b/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/index.js
index 44564fa07fec..23251129fae9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-annotation-to-extern/test/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const runner = require('@babel/helper-plugin-test-runner').default;
 
 runner(__dirname);
diff --git a/build-system/babel-plugins/babel-plugin-transform-default-assignment/index.js b/build-system/babel-plugins/babel-plugin-transform-default-assignment/index.js
index 9434311e73a1..ca1e273fff6b 100644
--- a/build-system/babel-plugins/babel-plugin-transform-default-assignment/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-default-assignment/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Injects alias identifiers for values with default assignments.
  * Closure can't correctly type-narrow the defaulted value to exclude `undefined`,
diff --git a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/should-transform-param-destructures/input.js b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/should-transform-param-destructures/input.js
index 569aff39effb..d2d62e908cef 100644
--- a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/should-transform-param-destructures/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/should-transform-param-destructures/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 function test({a = 1, b: bb = 2}, [c = 3]) {
   a;
   bb
diff --git a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/should-transform-param-destructures/output.js b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/should-transform-param-destructures/output.js
index b0e794741a1f..109367ebedf1 100644
--- a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/should-transform-param-destructures/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/should-transform-param-destructures/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 function test({
   a = 1,
   b: bb = 2
diff --git a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/should-transform-param/input.js b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/should-transform-param/input.js
index f2bbfaf79ef5..cf7fbc5d8e73 100644
--- a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/should-transform-param/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/should-transform-param/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 function test(param = 1) {
   param;
 }
diff --git a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/should-transform-param/output.js b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/should-transform-param/output.js
index 2c829122e407..7571a5ac9704 100644
--- a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/should-transform-param/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/should-transform-param/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 function test(param = 1) {
   let _param = param;
   _param;
diff --git a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-on-param-assignment-with-destructure/input.js b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-on-param-assignment-with-destructure/input.js
index 26f47494019f..0fbe71cc15e0 100644
--- a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-on-param-assignment-with-destructure/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-on-param-assignment-with-destructure/input.js
@@ -1,18 +1,2 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 function test({x} = {}) {
 }
diff --git a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-when-default-destructure-references-default-destructure/input.js b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-when-default-destructure-references-default-destructure/input.js
index 7204095eb60c..e35b345a5400 100644
--- a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-when-default-destructure-references-default-destructure/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-when-default-destructure-references-default-destructure/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 function test({a = 1}, {b = a}) {
   a;
   b;
diff --git a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-when-default-destructure-references-default/input.js b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-when-default-destructure-references-default/input.js
index 43817c0243bd..579f73a82b25 100644
--- a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-when-default-destructure-references-default/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-when-default-destructure-references-default/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 function test(a = 1, {b = a}) {
   a;
   b;
diff --git a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-when-default-references-default-destructure/input.js b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-when-default-references-default-destructure/input.js
index 3a944024fbc4..e739bd54b33f 100644
--- a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-when-default-references-default-destructure/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-when-default-references-default-destructure/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 function test({a = 1}, b = a) {
   a;
   b;
diff --git a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-when-default-references-default/input.js b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-when-default-references-default/input.js
index c32c1f2dc5aa..cf53bc883c7e 100644
--- a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-when-default-references-default/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/fixtures/transform-assertions/throws-when-default-references-default/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 function test(a = 1, b = a) {
   a;
   b;
diff --git a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/index.js b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/index.js
index bb2e50c56b6a..23251129fae9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-default-assignment/test/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const runner = require('@babel/helper-plugin-test-runner').default;
 
 runner(__dirname);
diff --git a/build-system/babel-plugins/babel-plugin-transform-dev-methods/index.js b/build-system/babel-plugins/babel-plugin-transform-dev-methods/index.js
index 64a0610d48d7..681149f9e140 100644
--- a/build-system/babel-plugins/babel-plugin-transform-dev-methods/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-dev-methods/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const {dirname, join, relative, resolve} = require('path').posix;
 
 /**
diff --git a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-both-no-usage/input.js b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-both-no-usage/input.js
index 701a9066d370..f349d2f443d6 100644
--- a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-both-no-usage/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-both-no-usage/input.js
@@ -1,17 +1 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dev, user} from '../../../../../../../src/log';
\ No newline at end of file
diff --git a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-both-no-usage/output.mjs b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-both-no-usage/output.mjs
index 2d2a64704e0f..e96e6ba3511d 100644
--- a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-both-no-usage/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-both-no-usage/output.mjs
@@ -1,16 +1 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import { dev, user } from '../../../../../../../src/log';
diff --git a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-both-usage/input.js b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-both-usage/input.js
index 64e84c83b99b..d9e12d84f539 100644
--- a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-both-usage/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-both-usage/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dev, user} from '../../../../../../../src/log';
 
 dev().info(
diff --git a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-both-usage/output.mjs b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-both-usage/output.mjs
index c4cea728c805..dbc755202a1d 100644
--- a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-both-usage/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-both-usage/output.mjs
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import { dev, user } from '../../../../../../../src/log';
 dev().info;
 user().fine;
diff --git a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-dev-no-usage/input.js b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-dev-no-usage/input.js
index d3a1e177e5c9..32feb8f9c6eb 100644
--- a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-dev-no-usage/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-dev-no-usage/input.js
@@ -1,17 +1 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dev} from '../../../../../../../src/log';
\ No newline at end of file
diff --git a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-dev-no-usage/output.mjs b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-dev-no-usage/output.mjs
index 676ac2d38133..66df2cbdfbd3 100644
--- a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-dev-no-usage/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-dev-no-usage/output.mjs
@@ -1,16 +1 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import { dev } from '../../../../../../../src/log';
diff --git a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-dev-usage/input.js b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-dev-usage/input.js
index 16ce2777b083..733b263d9f81 100644
--- a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-dev-usage/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-dev-usage/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dev} from '../../../../../../../src/log';
 
 dev().info(
diff --git a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-dev-usage/output.mjs b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-dev-usage/output.mjs
index fca17e1a7dfb..1aaef1f1ca7a 100644
--- a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-dev-usage/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-dev-usage/output.mjs
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import { dev } from '../../../../../../../src/log';
 dev().info;
 dev().fine;
diff --git a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-user-usage/input.js b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-user-usage/input.js
index 92cccc555df7..2890a5fedca9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-user-usage/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-user-usage/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {user} from '../../../../../../../src/log';
 
 user().fine(TAG, 'fine');
diff --git a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-user-usage/output.mjs b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-user-usage/output.mjs
index cb12412e7508..6e9e8f096aa0 100644
--- a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-user-usage/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/imported-user-usage/output.mjs
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import { user } from '../../../../../../../src/log';
 user().fine;
 user().error('Should not be removed');
diff --git a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/no-import/input.js b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/no-import/input.js
index 65de6d988951..745978235c03 100644
--- a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/no-import/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/no-import/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 dev().info(
   TAG,
   'Removing iframe query string before navigation:',
diff --git a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/no-import/output.js b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/no-import/output.js
index f7058519d42b..728818c9042f 100644
--- a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/no-import/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/fixtures/transform-assertions/no-import/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 dev().info(TAG, 'Removing iframe query string before navigation:', fromLocation.search);
 dev().info;
 dev().fine(TAG, 'fine');
diff --git a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/index.js b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/index.js
index bb2e50c56b6a..23251129fae9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-dev-methods/test/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const runner = require('@babel/helper-plugin-test-runner').default;
 
 runner(__dirname);
diff --git a/build-system/babel-plugins/babel-plugin-transform-fix-leading-comments/index.js b/build-system/babel-plugins/babel-plugin-transform-fix-leading-comments/index.js
index 8ec03b912f44..bce7ebe944c6 100644
--- a/build-system/babel-plugins/babel-plugin-transform-fix-leading-comments/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-fix-leading-comments/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Reassigns the trailing comments of a statement to be leading comment of its
  * next sibling. This is because JSDoc comments (which should be on the next
diff --git a/build-system/babel-plugins/babel-plugin-transform-fix-leading-comments/test/fixtures/transform/basic/input.js b/build-system/babel-plugins/babel-plugin-transform-fix-leading-comments/test/fixtures/transform/basic/input.js
index 616cf306a57f..74998b529de9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-fix-leading-comments/test/fixtures/transform/basic/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-fix-leading-comments/test/fixtures/transform/basic/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @protected {?Object<string, !ChildDef>}
  */
diff --git a/build-system/babel-plugins/babel-plugin-transform-fix-leading-comments/test/fixtures/transform/basic/output.js b/build-system/babel-plugins/babel-plugin-transform-fix-leading-comments/test/fixtures/transform/basic/output.js
index 616cf306a57f..74998b529de9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-fix-leading-comments/test/fixtures/transform/basic/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-fix-leading-comments/test/fixtures/transform/basic/output.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @protected {?Object<string, !ChildDef>}
  */
diff --git a/build-system/babel-plugins/babel-plugin-transform-fix-leading-comments/test/index.js b/build-system/babel-plugins/babel-plugin-transform-fix-leading-comments/test/index.js
index bb2e50c56b6a..23251129fae9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-fix-leading-comments/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-fix-leading-comments/test/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const runner = require('@babel/helper-plugin-test-runner').default;
 
 runner(__dirname);
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/index.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/index.js
index 193c8df93959..531678f4fce6 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // @ts-nocheck
 
 /**
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/argument-function-identifier/input.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/argument-function-identifier/input.js
index a7d9949a92d6..dad091b082b1 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/argument-function-identifier/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/argument-function-identifier/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 function Foo(a) {
   return a + 1;
 }
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/argument-function-identifier/output.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/argument-function-identifier/output.js
index 22352d6b260b..4e8fdb8df3f9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/argument-function-identifier/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/argument-function-identifier/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 function Foo(a) {
   return a + 1;
 }
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/argument-function/input.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/argument-function/input.js
index 7aefb4c339b0..bbd1ab3635ea 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/argument-function/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/argument-function/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 registerServiceBuilder(win, 'story-analytics', function() {
   return new StoryAnalyticsService();
 });
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/argument-function/output.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/argument-function/output.js
index dfcca91b730c..461da94617e6 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/argument-function/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/argument-function/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 registerServiceBuilder(win, 'story-analytics', function () {
   return new StoryAnalyticsService();
 });
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/arguments-identifier/input.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/arguments-identifier/input.js
index 7701300c3581..bc7ebfcc1b0c 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/arguments-identifier/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/arguments-identifier/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 function argumentsUsage() {
   return arguments[0] + arguments[1];
 }
\ No newline at end of file
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/arguments-identifier/output.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/arguments-identifier/output.js
index 7701300c3581..913d14e6241c 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/arguments-identifier/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/arguments-identifier/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 function argumentsUsage() {
   return arguments[0] + arguments[1];
-}
\ No newline at end of file
+}
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/async-function/input.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/async-function/input.js
index e97d153fc31d..90ea389e9788 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/async-function/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/async-function/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 async function test(a, b) {
   return a + b;
 }
\ No newline at end of file
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/async-function/output.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/async-function/output.js
index df61d8db3d90..f79f41aa3d52 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/async-function/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/async-function/output.js
@@ -1,16 +1 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-let test = async (a, b) => a + b;
\ No newline at end of file
+let test = async (a, b) => a + b;
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/class-function-declaration-in-public-method/input.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/class-function-declaration-in-public-method/input.js
index e18934aa8c73..26cf26f1a61d 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/class-function-declaration-in-public-method/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/class-function-declaration-in-public-method/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 class Foo {
   foo() {
     function testInFooClass() {
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/class-function-declaration-in-public-method/output.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/class-function-declaration-in-public-method/output.js
index 91305e8fc77c..d22046aa2542 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/class-function-declaration-in-public-method/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/class-function-declaration-in-public-method/output.js
@@ -1,21 +1,6 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 class Foo {
   foo() {
     let testInFooClass = () => '';
   }
 
-}
\ No newline at end of file
+}
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/existing-arrow-function/input.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/existing-arrow-function/input.js
index 1fa6a800ce9f..ea3d3a106fdb 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/existing-arrow-function/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/existing-arrow-function/input.js
@@ -1,17 +1,2 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const thing = (a, b) => a + b;
 let thing2 = (a, b) => a * b;
\ No newline at end of file
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/existing-arrow-function/output.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/existing-arrow-function/output.js
index d9016bf90003..cf089ea2ae3d 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/existing-arrow-function/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/existing-arrow-function/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const thing = (a, b) => a + b;
 
-let thing2 = (a, b) => a * b;
\ No newline at end of file
+let thing2 = (a, b) => a * b;
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/existing-async-arrow-function/input.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/existing-async-arrow-function/input.js
index ce5ba34b86e0..881a0d07804f 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/existing-async-arrow-function/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/existing-async-arrow-function/input.js
@@ -1,17 +1,2 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const thing = async (a, b) => a + b;
 let thing2 = async (a, b) => a * b;
\ No newline at end of file
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/existing-async-arrow-function/output.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/existing-async-arrow-function/output.js
index 5301ac53ea4c..78e7b57d0a6a 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/existing-async-arrow-function/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/existing-async-arrow-function/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const thing = async (a, b) => a + b;
 
-let thing2 = async (a, b) => a * b;
\ No newline at end of file
+let thing2 = async (a, b) => a * b;
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/export-default-named-declaration/input.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/export-default-named-declaration/input.js
index d5f7256cc3f0..b0cfaa315781 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/export-default-named-declaration/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/export-default-named-declaration/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 export default function exportedFunctionDefault(a, b) {
   return a + b;
 } 
\ No newline at end of file
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/export-default-named-declaration/output.mjs b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/export-default-named-declaration/output.mjs
index 7ace427d481a..d61c7917f540 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/export-default-named-declaration/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/export-default-named-declaration/output.mjs
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 export default function exportedFunctionDefault(a, b) {
   return a + b;
-}
\ No newline at end of file
+}
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/export-named-declaration/input.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/export-named-declaration/input.js
index 383729969a6c..2ae5de9ae07b 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/export-named-declaration/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/export-named-declaration/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 export function exportedFunction(a, b) {
   return a + b;
 }
\ No newline at end of file
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/export-named-declaration/output.mjs b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/export-named-declaration/output.mjs
index 0cee22563dfe..069cbe5c3aca 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/export-named-declaration/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/export-named-declaration/output.mjs
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 export function exportedFunction(a, b) {
   return a + b;
 }
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/function-expression/input.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/function-expression/input.js
index ea7c99a6e799..be5595b96eac 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/function-expression/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/function-expression/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const x = function(thing) {
   return console.log(thing + 1);
 }
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/function-expression/output.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/function-expression/output.js
index a68f3872dc0e..bd04bbe1475b 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/function-expression/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/function-expression/output.js
@@ -1,20 +1,5 @@
 let fixedEncodeURIComponent = str => encodeURIComponent(str).replace(/[!'()*]/g, c => '%' + c.charCodeAt(0).toString(16));
 
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const x = thing => console.log(thing + 1);
 
 let fixedEncodeURIComponentArrow = str => encodeURIComponent(str).replace(/[!'()*]/g, c => '%' + c.charCodeAt(0).toString(16));
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/generator-function/input.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/generator-function/input.js
index 357fd6161c4f..c592dceffe33 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/generator-function/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/generator-function/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 function* fakeGeneratorFunction(a, b) {
   return a + b;
 }
\ No newline at end of file
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/generator-function/output.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/generator-function/output.js
index 357fd6161c4f..aeb113b97d4f 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/generator-function/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/generator-function/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 function* fakeGeneratorFunction(a, b) {
   return a + b;
-}
\ No newline at end of file
+}
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/multiple-body-statements/input.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/multiple-body-statements/input.js
index 45d933b5caf7..eae86fd2cd10 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/multiple-body-statements/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/multiple-body-statements/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 function notSingleBodyReturn(a, b, c) {
   c = c || '';
   return a + b + c;
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/multiple-body-statements/output.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/multiple-body-statements/output.js
index 90c6333aca87..6f8866c70620 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/multiple-body-statements/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/multiple-body-statements/output.js
@@ -1,19 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 function notSingleBodyReturn(a, b, c) {
   c = c || '';
   return a + b + c;
-}
\ No newline at end of file
+}
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/nested-function-inside-export/input.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/nested-function-inside-export/input.js
index 9fd38bc56812..de14fbf8389e 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/nested-function-inside-export/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/nested-function-inside-export/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 export default function Foo() {
   console.log(couldBeAnArrow());
   function couldBeAnArrow() { 
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/nested-function-inside-export/output.mjs b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/nested-function-inside-export/output.mjs
index ff08b0fff413..4ad9c8505de0 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/nested-function-inside-export/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/nested-function-inside-export/output.mjs
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 export default function Foo() {
   let couldBeAnArrow = () => 1;
 
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/new-expression/input.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/new-expression/input.js
index 270ab57c97f3..3ef7a816b3ce 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/new-expression/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/new-expression/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 function isNewed(a, b) {
   return a + b;
 }
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/new-expression/output.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/new-expression/output.js
index 270ab57c97f3..f8962935bca7 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/new-expression/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/new-expression/output.js
@@ -1,20 +1,5 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 function isNewed(a, b) {
   return a + b;
 }
 
-console.log(new isNewed('a', 'b'));
\ No newline at end of file
+console.log(new isNewed('a', 'b'));
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/no-return/input.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/no-return/input.js
index 5f5d161bd1be..45469c3045c7 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/no-return/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/no-return/input.js
@@ -1,16 +1 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 function test(a, b) {}
\ No newline at end of file
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/no-return/output.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/no-return/output.js
index 5f5d161bd1be..32614cd138a3 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/no-return/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/no-return/output.js
@@ -1,16 +1 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-function test(a, b) {}
\ No newline at end of file
+function test(a, b) {}
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/single-return-statement/input.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/single-return-statement/input.js
index de92e8b7c982..28493344aa44 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/single-return-statement/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/single-return-statement/input.js
@@ -1,19 +1,3 @@
-
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 function test(a, b) {
   return a + b;
 }
\ No newline at end of file
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/single-return-statement/output.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/single-return-statement/output.js
index 2a20a3e02bfa..1df9d62c92e4 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/single-return-statement/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/single-return-statement/output.js
@@ -1,16 +1 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-let test = (a, b) => a + b;
\ No newline at end of file
+let test = (a, b) => a + b;
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/this-argument/input.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/this-argument/input.js
index dc05cadab686..8a7ba0445c20 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/this-argument/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/this-argument/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 function thisArgument(a, b) {
   return this.a + a + b;
 }
\ No newline at end of file
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/this-argument/output.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/this-argument/output.js
index dc05cadab686..7ea1c6ebaf75 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/this-argument/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/fixtures/transform-assertions/this-argument/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 function thisArgument(a, b) {
   return this.a + a + b;
-}
\ No newline at end of file
+}
diff --git a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/index.js b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/index.js
index bb2e50c56b6a..23251129fae9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-function-declarations/test/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const runner = require('@babel/helper-plugin-test-runner').default;
 
 runner(__dirname);
diff --git a/build-system/babel-plugins/babel-plugin-transform-html-template/index.js b/build-system/babel-plugins/babel-plugin-transform-html-template/index.js
index 997b0f0b0278..fd9bc177085c 100644
--- a/build-system/babel-plugins/babel-plugin-transform-html-template/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-html-template/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // @ts-nocheck
 
 const {
diff --git a/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/direct/input.js b/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/direct/input.js
index 7b97fed5d49e..e344ccd79edd 100644
--- a/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/direct/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/direct/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 console.log(html`html usage`);
 console.log(html`html usage
 multiline`);
diff --git a/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/direct/output.js b/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/direct/output.js
index dcdd94f4e3d9..6c28684eb8dd 100644
--- a/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/direct/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/direct/output.js
@@ -5,22 +5,6 @@ const _template = ["html usage"],
       _template5 = ["<div>fifth sibling</div>"],
       _template6 = ["<svg>sixth sibling</svg>"],
       _template7 = ["<svg>seventh sibling</svg>"];
-
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 console.log(html(["html usage"]));
 console.log(html(["html usage multiline"]));
 console.log(html(["<p active=true>Attribute Quote Removal</p>"]));
diff --git a/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/indirect/input.js b/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/indirect/input.js
index 52513aa30dcd..0a864f850615 100644
--- a/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/indirect/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/indirect/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const x = html;
 console.log(x`html usage`);
 const html = htmlFor(element);
diff --git a/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/indirect/output.js b/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/indirect/output.js
index 34afb24d7302..6e64a60a150f 100644
--- a/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/indirect/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/indirect/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const x = html;
 console.log(x`html usage`);
 const html = htmlFor(element);
diff --git a/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/invalid/input.js b/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/invalid/input.js
index 1b88fa0c00ff..cf54ee3480af 100644
--- a/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/invalid/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/invalid/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 console.log(html`html ${foo}`);
 console.log(html`html ${foo} another`);
 console.log(html`html ${foo} another ${bar} thing`);
diff --git a/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/invalid/output.js b/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/invalid/output.js
index 16951a354d5c..cf54ee3480af 100644
--- a/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/invalid/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/invalid/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 console.log(html`html ${foo}`);
 console.log(html`html ${foo} another`);
 console.log(html`html ${foo} another ${bar} thing`);
diff --git a/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/other-template-literals/input.js b/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/other-template-literals/input.js
index ede2ce220d70..95bb9acb9215 100644
--- a/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/other-template-literals/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/other-template-literals/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 console.log(`template literal`);
 const stringReplacement = 'yo';
 console.log(`template (${stringReplacement}) literal`);
diff --git a/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/other-template-literals/output.js b/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/other-template-literals/output.js
index 22f97010b0e9..39d3c52a98fa 100644
--- a/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/other-template-literals/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-html-template/test/fixtures/transform-assertions/other-template-literals/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 console.log(`template literal`);
 const stringReplacement = 'yo';
 console.log(`template (${stringReplacement}) literal`);
diff --git a/build-system/babel-plugins/babel-plugin-transform-html-template/test/index.js b/build-system/babel-plugins/babel-plugin-transform-html-template/test/index.js
index 7b6d7376a749..23251129fae9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-html-template/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-html-template/test/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const runner = require('@babel/helper-plugin-test-runner').default;
 
 runner(__dirname);
diff --git a/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/index.js b/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/index.js
index 86c4e09b415e..8b1f80a1599e 100644
--- a/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // @ts-nocheck
 
 const {dirname, join: joinPath, relative} = require('path');
diff --git a/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/test/fixtures/transform-assertions/isenumvalue/exported.mjs b/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/test/fixtures/transform-assertions/isenumvalue/exported.mjs
index eb2394217e3a..5db806cf8db3 100644
--- a/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/test/fixtures/transform-assertions/isenumvalue/exported.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/test/fixtures/transform-assertions/isenumvalue/exported.mjs
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 export const exportedEnum = {
   FOO: 'A',
   BAR: 'B',
diff --git a/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/test/fixtures/transform-assertions/isenumvalue/input.mjs b/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/test/fixtures/transform-assertions/isenumvalue/input.mjs
index 98f2d84c03db..c668f0e2b159 100644
--- a/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/test/fixtures/transform-assertions/isenumvalue/input.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/test/fixtures/transform-assertions/isenumvalue/input.mjs
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {exportedEnum} from './exported.mjs';
 
 isEnumValue(exportedEnum, subject);
diff --git a/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/test/fixtures/transform-assertions/isenumvalue/output.mjs b/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/test/fixtures/transform-assertions/isenumvalue/output.mjs
index d6752c0979ba..5923e3b0b9c9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/test/fixtures/transform-assertions/isenumvalue/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/test/fixtures/transform-assertions/isenumvalue/output.mjs
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import { exportedEnum } from './exported.mjs';
 subject === "A" || subject === "B" || subject === "C";
 const enumInFile = {
diff --git a/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/test/index.js b/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/test/index.js
index 762295c3a9c8..23251129fae9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-inline-isenumvalue/test/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const runner = require('@babel/helper-plugin-test-runner').default;
 
 runner(__dirname);
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-configuration/index.js b/build-system/babel-plugins/babel-plugin-transform-json-configuration/index.js
index cdfa1ad0b04d..8a089ab9fae5 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-configuration/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-json-configuration/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // @ts-nocheck
 
 /**
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/escapes/input.js b/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/escapes/input.js
index a0c97ef9760f..b089f72d7034 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/escapes/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/escapes/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 jsonLiteral({
   'dblquote': 'a[href$=".pdf"]',
   'interpolate': '${foo}',
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/escapes/output.js b/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/escapes/output.js
index 0c80b8d3c6bf..3fc10a293706 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/escapes/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/escapes/output.js
@@ -1,17 +1,2 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 `{"dblquote":"a[href$=\\".pdf\\"]","interpolate":"\${foo}","escape":"\\\\u00f8C","tick":"foo\`bar"}`;
 JSON.parse(`{"dblquote":"a[href$=\\".pdf\\"]","interpolate":"\${foo}","escape":"\\\\u00f8C","tick":"foo\`bar"}`);
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/json-literal/input.js b/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/json-literal/input.js
index e0b1afc3adea..915a053f29d0 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/json-literal/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/json-literal/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const inner = jsonLiteral({
   inner: true,
 });
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/json-literal/output.js b/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/json-literal/output.js
index 7f1d28fb636c..ee0f4efbddfa 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/json-literal/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/json-literal/output.js
@@ -1,17 +1,2 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const inner = `{"inner":true}`;
 JSON.parse(`{"config":${inner}}`);
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/transform/input.js b/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/transform/input.js
index 4e4c173210dc..f9de23a0e974 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/transform/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/transform/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 jsonConfiguration({});
 
 jsonConfiguration({a: 1});
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/transform/output.js b/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/transform/output.js
index acf68036b6ae..c7e71ddb343e 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/transform/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/fixtures/transform/transform/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 JSON.parse(`{}`);
 JSON.parse(`{"a":1}`);
 JSON.parse(`{"b":["test"]}`);
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/index.js b/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/index.js
index 44564fa07fec..23251129fae9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-json-configuration/test/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const runner = require('@babel/helper-plugin-test-runner').default;
 
 runner(__dirname);
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-import/index.js b/build-system/babel-plugins/babel-plugin-transform-json-import/index.js
index 56f3e1d57af7..24e58e165b11 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-import/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-json-import/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const {dirname, join, relative, resolve} = require('path');
 const {readFileSync} = require('fs');
 
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/error-cant-load-json/input.js b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/error-cant-load-json/input.js
index 05b2e1a392ef..9f7f59494ab5 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/error-cant-load-json/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/error-cant-load-json/input.js
@@ -1,18 +1,2 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import json from './404.json' assert { type: 'json' };
 
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/error-not-type-assertion/input.js b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/error-not-type-assertion/input.js
index c16088d63e2e..35c763f6e817 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/error-not-type-assertion/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/error-not-type-assertion/input.js
@@ -1,18 +1,2 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import json from './options.json' assert { more: 'other' };
 
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/error-not-type-json-assertion/input.js b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/error-not-type-json-assertion/input.js
index 8a741e52b7a4..20e66cd7745a 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/error-not-type-json-assertion/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/error-not-type-json-assertion/input.js
@@ -1,18 +1,2 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import json from './options.json' assert { type: 'other' };
 
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/error-too-many-assertions/input.js b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/error-too-many-assertions/input.js
index bf8b5356330e..0ae6d521634f 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/error-too-many-assertions/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/error-too-many-assertions/input.js
@@ -1,18 +1,2 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import json from './options.json' assert { type: 'json', more: 'other' };
 
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform-freeze/input.js b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform-freeze/input.js
index 98d9f9b0f46f..4fcea0772111 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform-freeze/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform-freeze/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import key from './options.json' assert { type: 'json' };
 import string from './options.json' assert { "type": 'json' };
 
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform-freeze/output.mjs b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform-freeze/output.mjs
index 2c01e1fa90ff..9b36c77da340 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform-freeze/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform-freeze/output.mjs
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const key = JSON.parse("{\"plugins\":[[\"../../../..\",{\"freeze\":true}]],\"sourceType\":\"module\"}", function (key, val) {
   if (typeof val === 'object') Object.freeze(val);
   return val;
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform-no-freeze/input.js b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform-no-freeze/input.js
index 98d9f9b0f46f..4fcea0772111 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform-no-freeze/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform-no-freeze/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import key from './options.json' assert { type: 'json' };
 import string from './options.json' assert { "type": 'json' };
 
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform-no-freeze/output.mjs b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform-no-freeze/output.mjs
index b862d0800a56..1b0472ba1bcc 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform-no-freeze/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform-no-freeze/output.mjs
@@ -1,17 +1,2 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const key = JSON.parse("{\"plugins\":[[\"../../../..\",{\"freeze\":false}]],\"sourceType\":\"module\"}");
 const string = JSON.parse("{\"plugins\":[[\"../../../..\",{\"freeze\":false}]],\"sourceType\":\"module\"}");
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform/input.js b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform/input.js
index 98d9f9b0f46f..4fcea0772111 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import key from './options.json' assert { type: 'json' };
 import string from './options.json' assert { "type": 'json' };
 
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform/output.mjs b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform/output.mjs
index 084b4643d22f..a292d6914404 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-json-import/test/fixtures/transform-assertions/transform/output.mjs
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const key = JSON.parse("{\"plugins\":[\"../../../..\"],\"sourceType\":\"module\"}", function (key, val) {
   if (typeof val === 'object') Object.freeze(val);
   return val;
diff --git a/build-system/babel-plugins/babel-plugin-transform-json-import/test/index.js b/build-system/babel-plugins/babel-plugin-transform-json-import/test/index.js
index bb2e50c56b6a..23251129fae9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-json-import/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-json-import/test/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const runner = require('@babel/helper-plugin-test-runner').default;
 
 runner(__dirname);
diff --git a/build-system/babel-plugins/babel-plugin-transform-jss/create-hash.js b/build-system/babel-plugins/babel-plugin-transform-jss/create-hash.js
index bd75969db79f..2684cd1bdb4b 100644
--- a/build-system/babel-plugins/babel-plugin-transform-jss/create-hash.js
+++ b/build-system/babel-plugins/babel-plugin-transform-jss/create-hash.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const crypto = require('crypto');
 
 // This is in its own file in order to make it easy to stub in tests.
diff --git a/build-system/babel-plugins/babel-plugin-transform-jss/index.js b/build-system/babel-plugins/babel-plugin-transform-jss/index.js
index 3afebc64b0af..7c73d6c02303 100644
--- a/build-system/babel-plugins/babel-plugin-transform-jss/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-jss/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // @ts-nocheck
 
 /**
diff --git a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/ignore-non-jss-file/input.js b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/ignore-non-jss-file/input.js
index 3e489713c512..c8dfc37fff56 100644
--- a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/ignore-non-jss-file/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/ignore-non-jss-file/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createUseStyles} from 'react-jss';
 const JSS = {button: {fontSize: 12}};
 export const useStyles = createUseStyles(JSS);
diff --git a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/ignore-non-jss-file/output.mjs b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/ignore-non-jss-file/output.mjs
index e26871f07bbf..dc582569bcee 100644
--- a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/ignore-non-jss-file/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/ignore-non-jss-file/output.mjs
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import { createUseStyles } from 'react-jss';
 const JSS = {
   button: {
diff --git a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/ignore-unrelated-exports/input.js b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/ignore-unrelated-exports/input.js
index c134476e3ecb..c7572bf077dc 100644
--- a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/ignore-unrelated-exports/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/ignore-unrelated-exports/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createUseStyles} from 'react-jss';
 
 export const useStyles = createUseStyles({
diff --git a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/ignore-unrelated-exports/output.mjs b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/ignore-unrelated-exports/output.mjs
index 091472ce0622..4aa27f3da6f9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/ignore-unrelated-exports/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/ignore-unrelated-exports/output.mjs
@@ -3,22 +3,6 @@ var _classes = {
   floatLeft: "float-left-07984bd"
 };
 export const $floatLeft = "float-left-07984bd";
-
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 export const useStyles = () => _classes; // These next lines should be unaffected by jss transform.
 
 export const CSS = ".float-left-07984bd{float:left}";
diff --git a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-deopt-use-styles/input.mjs b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-deopt-use-styles/input.mjs
index 821c11ff5fb9..a98af0bd63b0 100644
--- a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-deopt-use-styles/input.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-deopt-use-styles/input.mjs
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // useStyles() references that don't belong to a MemberExpression should be 
 // preserve the classname object.
 
diff --git a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-deopt-use-styles/output.mjs b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-deopt-use-styles/output.mjs
index 337b61667d25..f133cd409819 100644
--- a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-deopt-use-styles/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-deopt-use-styles/output.mjs
@@ -1,21 +1,5 @@
 import { $thisOneIsOptimized as _$thisOneIsOptimized2 } from "./bar.jss";
 import { $thisOneIsOptimized as _$thisOneIsOptimized } from "./foo.jss";
-
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // useStyles() references that don't belong to a MemberExpression should be 
 // preserve the classname object.
 // TODO(alanorozco): It would be nice if these cases were linted to prevent
diff --git a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-replace-use-styles/input.mjs b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-replace-use-styles/input.mjs
index 2f1f8d6d6212..802b4e0137a7 100644
--- a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-replace-use-styles/input.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-replace-use-styles/input.mjs
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {useStyles} from '../foo.jss';
 import {useStyles as useSomeOtherNameWithStyles} from './something.jss';
 
diff --git a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-replace-use-styles/output.mjs b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-replace-use-styles/output.mjs
index 0b9f4881be85..4cebfed48dc4 100644
--- a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-replace-use-styles/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-replace-use-styles/output.mjs
@@ -5,22 +5,6 @@ import { $x as _$x2 } from "../foo.jss";
 import { $foo as _$foo } from "./something.jss";
 import { $x as _$x } from "../foo.jss";
 import { $b as _$b } from "../foo.jss";
-
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import { useStyles } from '../foo.jss';
 import { useStyles as useSomeOtherNameWithStyles } from './something.jss';
 console.log(_$b);
diff --git a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-replace-variable-refs/input.mjs b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-replace-variable-refs/input.mjs
index 9dd5b0c9696b..46f7a563111c 100644
--- a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-replace-variable-refs/input.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-replace-variable-refs/input.mjs
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {useStyles} from 'foo';
 
 const direct = useStyles();
diff --git a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-replace-variable-refs/output.mjs b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-replace-variable-refs/output.mjs
index 15ef1e0ed863..3bb1cadd4db6 100644
--- a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-replace-variable-refs/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-replace-variable-refs/output.mjs
@@ -2,22 +2,6 @@ import { $objectPatternPropertyIndirect as _$objectPatternPropertyIndirect } fro
 import { $memberExpressionIndirect as _$memberExpressionIndirect } from "foo";
 import { $objectPatternProperty as _$objectPatternProperty } from "foo";
 import { $memberExpression as _$memberExpression } from "foo";
-
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import { useStyles } from 'foo';
 _$memberExpression;
 const objectPatternProperty = _$objectPatternProperty;
diff --git a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-throw-classname/input.js b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-throw-classname/input.js
index d8fba9fc2a00..1f0b8715b029 100644
--- a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-throw-classname/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-throw-classname/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Throws because cant use classname "CSS", as it conflicts with this transform.
 import {createUseStyles} from 'react-jss'; 
 export const useStyles = createUseStyles({CSS: {fontSize: 12}});
diff --git a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-throw-confidence/input.js b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-throw-confidence/input.js
index 411572a0b72c..438455b762cb 100644
--- a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-throw-confidence/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-throw-confidence/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Throws because object spread is not statically evaluable.
 import {createUseStyles} from 'react-jss';
 const foo = {foo: 7}
diff --git a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-transform-jss-var/input.js b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-transform-jss-var/input.js
index 22a0e05a0901..1e9b2f58c688 100644
--- a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-transform-jss-var/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-transform-jss-var/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */ 
 import {createUseStyles} from 'react-jss'
 
 const JSS = {button: {fontSize: 12}};
diff --git a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-transform-jss-var/output.mjs b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-transform-jss-var/output.mjs
index 4150a4b53e1d..51be9dc26219 100644
--- a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-transform-jss-var/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-transform-jss-var/output.mjs
@@ -2,22 +2,6 @@
 var _classes = {
   button: "button-21aa4a8"
 };
-
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const JSS = {
   button: {
     fontSize: 12
diff --git a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-transform-literal/input.js b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-transform-literal/input.js
index 2c112dcaeb25..14435c0455dc 100644
--- a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-transform-literal/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-transform-literal/input.js
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 import {createUseStyles} from 'react-jss';
 
diff --git a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-transform-literal/output.mjs b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-transform-literal/output.mjs
index 9cec9b482330..613985374769 100644
--- a/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-transform-literal/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-jss/test/fixtures/transform-assertions/should-transform-literal/output.mjs
@@ -5,21 +5,5 @@ var _classes = {
 };
 export const $floatLeft = "float-left-a6c6677";
 export const $fill = "fill-a6c6677";
-
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 export const useStyles = () => _classes;
 export const CSS = ".float-left-a6c6677{float:left;border:1px solid #000}.fill-a6c6677{-ms-flex:1 1 auto;flex:1 1 auto;display:block;position:relative}";
diff --git a/build-system/babel-plugins/babel-plugin-transform-jss/test/index.js b/build-system/babel-plugins/babel-plugin-transform-jss/test/index.js
index fd57322cb9d1..9345d8dce828 100644
--- a/build-system/babel-plugins/babel-plugin-transform-jss/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-jss/test/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const babel = require('@babel/core');
 const path = require('path');
 const runner = require('@babel/helper-plugin-test-runner').default;
diff --git a/build-system/babel-plugins/babel-plugin-transform-log-methods/index.js b/build-system/babel-plugins/babel-plugin-transform-log-methods/index.js
index 7c165dd92232..7d20ad5af51d 100644
--- a/build-system/babel-plugins/babel-plugin-transform-log-methods/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-log-methods/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // @ts-nocheck
 
 /**
diff --git a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/invalid/input.js b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/invalid/input.js
index 0608ad1edef7..6ec2d14c098c 100644
--- a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/invalid/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/invalid/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // One of method name or singleton name are invalid, so they stay the same.
 notDev().assert('not', 'transformed');
 aRandomModule().createError('not transformed');
diff --git a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/invalid/output.js b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/invalid/output.js
index 0608ad1edef7..6ec2d14c098c 100644
--- a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/invalid/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/invalid/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // One of method name or singleton name are invalid, so they stay the same.
 notDev().assert('not', 'transformed');
 aRandomModule().createError('not transformed');
diff --git a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/no-args/input.js b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/no-args/input.js
index ef8624246de1..f3f8bf43be09 100644
--- a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/no-args/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/no-args/input.js
@@ -1,17 +1,2 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // No arguments, should be indirected.
 dev().createError('This is an error with no arguments.');
diff --git a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/no-args/output.js b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/no-args/output.js
index 5714880f1e48..1382e4a8012f 100644
--- a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/no-args/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/no-args/output.js
@@ -1,17 +1,2 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // No arguments, should be indirected.
 dev().createError(["0"]);
diff --git a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/no-message/input.js b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/no-message/input.js
index 4c71f5192fa0..3e469263b0da 100644
--- a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/no-message/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/no-message/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // No message, stays the same.
 user().assert(1 + 1);
 const result1 = user().assert(1 + 1);
diff --git a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/no-message/output.js b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/no-message/output.js
index 4c71f5192fa0..3e469263b0da 100644
--- a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/no-message/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/no-message/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // No message, stays the same.
 user().assert(1 + 1);
 const result1 = user().assert(1 + 1);
diff --git a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/one-arg-variadic/input.js b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/one-arg-variadic/input.js
index a1477f5c2220..fefdb8a15ac1 100644
--- a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/one-arg-variadic/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/one-arg-variadic/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // One argument in variadic method, should be indirected unless the message
 // argument itself is variable or the string is small enough that indirection
 // would increase file size.
diff --git a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/one-arg-variadic/output.js b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/one-arg-variadic/output.js
index 6aaa8c959331..fbe194dac012 100644
--- a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/one-arg-variadic/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/one-arg-variadic/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // One argument in variadic method, should be indirected unless the message
 // argument itself is variable or the string is small enough that indirection
 // would increase file size.
diff --git a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/template-literals/input.js b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/template-literals/input.js
index 2eca7e3afc45..4faae6331513 100644
--- a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/template-literals/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/template-literals/input.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 user().assert(true, `I'm a ${template} literal with one argument.`);
 user().assert(x != y, `I have ${foo}, ${bar} and ${baz}.`);
 userAssert(false, `Template ${index} = 2`);
diff --git a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/template-literals/output.js b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/template-literals/output.js
index e80c8be7269e..8001adacc7b1 100644
--- a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/template-literals/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/fixtures/transform-log-methods/template-literals/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 user().assert(true, ["0", template]);
 user().assert(x != y, ["1", foo, bar, baz]);
 userAssert(false, ["2", index]);
diff --git a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/index.js b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/index.js
index 98bb5d3c763c..23251129fae9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-log-methods/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-log-methods/test/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const runner = require('@babel/helper-plugin-test-runner').default;
 
 runner(__dirname);
diff --git a/build-system/babel-plugins/babel-plugin-transform-minified-comments/index.js b/build-system/babel-plugins/babel-plugin-transform-minified-comments/index.js
index bac5cae662dc..3684eeccb24f 100644
--- a/build-system/babel-plugins/babel-plugin-transform-minified-comments/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-minified-comments/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Ensure comments in minified build output is minimal.
  *
diff --git a/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/fixtures/transform/licenses-tabs/input.js b/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/fixtures/transform/licenses-tabs/input.js
index f323fce29f27..38f6433166be 100644
--- a/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/fixtures/transform/licenses-tabs/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/fixtures/transform/licenses-tabs/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const Gd={PRERENDER:"prerender",VISIBLE:"visible",HIDDEN:"hidden",PAUSED:"paused",INACTIVE:"inactive"};/*
    
 	Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
diff --git a/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/fixtures/transform/licenses-tabs/output.js b/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/fixtures/transform/licenses-tabs/output.js
index 1c1aae283a15..4491a80b3346 100644
--- a/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/fixtures/transform/licenses-tabs/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/fixtures/transform/licenses-tabs/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const Gd = {
   PRERENDER: "prerender",
   VISIBLE: "visible",
diff --git a/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/fixtures/transform/licenses/input.js b/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/fixtures/transform/licenses/input.js
index 4bcf05402278..50c17d04062b 100644
--- a/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/fixtures/transform/licenses/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/fixtures/transform/licenses/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const Gd={PRERENDER:"prerender",VISIBLE:"visible",HIDDEN:"hidden",PAUSED:"paused",INACTIVE:"inactive"};/*
    
   Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
diff --git a/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/fixtures/transform/licenses/output.js b/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/fixtures/transform/licenses/output.js
index 1c1aae283a15..4491a80b3346 100644
--- a/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/fixtures/transform/licenses/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/fixtures/transform/licenses/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const Gd = {
   PRERENDER: "prerender",
   VISIBLE: "visible",
diff --git a/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/index.js b/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/index.js
index bb2e50c56b6a..23251129fae9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-minified-comments/test/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const runner = require('@babel/helper-plugin-test-runner').default;
 
 runner(__dirname);
diff --git a/build-system/babel-plugins/babel-plugin-transform-parenthesize-expression/index.js b/build-system/babel-plugins/babel-plugin-transform-parenthesize-expression/index.js
index cbc0b624c364..cc9219d97170 100644
--- a/build-system/babel-plugins/babel-plugin-transform-parenthesize-expression/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-parenthesize-expression/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @interface {babel.PluginPass}
  * @param {babel} babel
diff --git a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/index.js b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/index.js
index 2c653ff97539..b2bb249d06f8 100644
--- a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const pathmodule = require('path');
 const {addNamed} = require('@babel/helper-module-imports');
 
diff --git a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/argument/input.js b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/argument/input.js
index 3b32772c7b92..47816b77427d 100644
--- a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/argument/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/argument/input.js
@@ -1,18 +1,2 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 Promise.resolve(1);
 Promise.resolve(undefined);
diff --git a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/argument/output.mjs b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/argument/output.mjs
index 149f92c68c6b..47816b77427d 100644
--- a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/argument/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/argument/output.mjs
@@ -1,17 +1,2 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 Promise.resolve(1);
 Promise.resolve(undefined);
diff --git a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/not-promise-resolve/input.js b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/not-promise-resolve/input.js
index 3f113ebbdb2d..17b7d9966032 100644
--- a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/not-promise-resolve/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/not-promise-resolve/input.js
@@ -1,18 +1,2 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 Promise.reject();
 Promise.resolve.x();
diff --git a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/not-promise-resolve/output.mjs b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/not-promise-resolve/output.mjs
index 27b766086b3b..17b7d9966032 100644
--- a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/not-promise-resolve/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/not-promise-resolve/output.mjs
@@ -1,17 +1,2 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 Promise.reject();
 Promise.resolve.x();
diff --git a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/promise-resolve/input.js b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/promise-resolve/input.js
index e16e538767a8..9366dd8951c9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/promise-resolve/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/promise-resolve/input.js
@@ -1,18 +1,2 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 Promise.resolve();
 Promise.resolve().then(() => {});
diff --git a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/promise-resolve/output.mjs b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/promise-resolve/output.mjs
index da2bcedd962b..3cf0ef279202 100644
--- a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/promise-resolve/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/promise-resolve/output.mjs
@@ -1,21 +1,6 @@
 import { resolvedPromise as _resolvedPromise2 } from "./../../../../../../../src/core/data-structures/promise";
 import { resolvedPromise as _resolvedPromise } from "./../../../../../../../src/core/data-structures/promise";
 
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 _resolvedPromise();
 
 _resolvedPromise2().then(() => {});
diff --git a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/relative-importing/input.js b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/relative-importing/input.js
index e16e538767a8..9366dd8951c9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/relative-importing/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/relative-importing/input.js
@@ -1,18 +1,2 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 Promise.resolve();
 Promise.resolve().then(() => {});
diff --git a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/relative-importing/output.mjs b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/relative-importing/output.mjs
index bf6f5a36fac4..5eecb612a4e5 100644
--- a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/relative-importing/output.mjs
+++ b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/fixtures/transform/relative-importing/output.mjs
@@ -1,21 +1,6 @@
 import { resolvedPromise as _resolvedPromise2 } from "./core/data-structures/promise";
 import { resolvedPromise as _resolvedPromise } from "./core/data-structures/promise";
 
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 _resolvedPromise();
 
 _resolvedPromise2().then(() => {});
diff --git a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/index.js b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/index.js
index 7b6d7376a749..23251129fae9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-promise-resolve/test/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const runner = require('@babel/helper-plugin-test-runner').default;
 
 runner(__dirname);
diff --git a/build-system/babel-plugins/babel-plugin-transform-remove-directives/index.js b/build-system/babel-plugins/babel-plugin-transform-remove-directives/index.js
index 0f1c290151ca..e492d696ba78 100644
--- a/build-system/babel-plugins/babel-plugin-transform-remove-directives/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-remove-directives/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @interface {babel.PluginPass}
  * @return {babel.PluginObj}
diff --git a/build-system/babel-plugins/babel-plugin-transform-remove-directives/test/fixtures/transform/directives/input.js b/build-system/babel-plugins/babel-plugin-transform-remove-directives/test/fixtures/transform/directives/input.js
index 13b19c148a6b..16b2c20ddfc0 100644
--- a/build-system/babel-plugins/babel-plugin-transform-remove-directives/test/fixtures/transform/directives/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-remove-directives/test/fixtures/transform/directives/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 function without() {}
 
 'use strict';
diff --git a/build-system/babel-plugins/babel-plugin-transform-remove-directives/test/fixtures/transform/directives/output.js b/build-system/babel-plugins/babel-plugin-transform-remove-directives/test/fixtures/transform/directives/output.js
index 158ac580aa45..ffb204942b7f 100644
--- a/build-system/babel-plugins/babel-plugin-transform-remove-directives/test/fixtures/transform/directives/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-remove-directives/test/fixtures/transform/directives/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 function without() {}
 
 'use strict';
diff --git a/build-system/babel-plugins/babel-plugin-transform-remove-directives/test/index.js b/build-system/babel-plugins/babel-plugin-transform-remove-directives/test/index.js
index bb2e50c56b6a..23251129fae9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-remove-directives/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-remove-directives/test/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const runner = require('@babel/helper-plugin-test-runner').default;
 
 runner(__dirname);
diff --git a/build-system/babel-plugins/babel-plugin-transform-stringish-literals/index.js b/build-system/babel-plugins/babel-plugin-transform-stringish-literals/index.js
index 6ee74a282cc7..48df0353a4c6 100644
--- a/build-system/babel-plugins/babel-plugin-transform-stringish-literals/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-stringish-literals/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const ESCAPE_REGEX = /\${|\\|`/g;
 
 /**
diff --git a/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/fixtures/transform/binary-expression/input.js b/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/fixtures/transform/binary-expression/input.js
index 503c3c85be06..b641f949577d 100644
--- a/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/fixtures/transform/binary-expression/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/fixtures/transform/binary-expression/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 let add = `/rtv` + `/bar`;
 let multipleAdd = `/rtv` + `/bar` + `/`;
 let subtract = `/rtv` - `r`;
diff --git a/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/fixtures/transform/binary-expression/output.js b/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/fixtures/transform/binary-expression/output.js
index 6e03c014dcdb..469210ca5321 100644
--- a/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/fixtures/transform/binary-expression/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/fixtures/transform/binary-expression/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 let add = "/rtv/bar";
 let multipleAdd = "/rtv/bar/";
 let subtract = "/rtv" - "r";
diff --git a/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/fixtures/transform/literals/input.js b/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/fixtures/transform/literals/input.js
index 4abd32666c43..3fb2aa59b25a 100644
--- a/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/fixtures/transform/literals/input.js
+++ b/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/fixtures/transform/literals/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 let none = `/rtv/100/log-messages.simple.json`;
 let start = `${'123'}/foo`;
 let middle = `/rtv/${'012003312116250'}/log-messages.simple.json`;
diff --git a/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/fixtures/transform/literals/output.js b/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/fixtures/transform/literals/output.js
index e25a50ce7b98..5e9b104ff2ce 100644
--- a/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/fixtures/transform/literals/output.js
+++ b/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/fixtures/transform/literals/output.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 let none = "/rtv/100/log-messages.simple.json";
 let start = "123/foo";
 let middle = "/rtv/012003312116250/log-messages.simple.json";
diff --git a/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/index.js b/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/index.js
index bb2e50c56b6a..23251129fae9 100644
--- a/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/index.js
+++ b/build-system/babel-plugins/babel-plugin-transform-stringish-literals/test/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const runner = require('@babel/helper-plugin-test-runner').default;
 
 runner(__dirname);
diff --git a/build-system/babel-plugins/log-module-metadata.js b/build-system/babel-plugins/log-module-metadata.js
index 83fea2763fdd..752a81584c77 100644
--- a/build-system/babel-plugins/log-module-metadata.js
+++ b/build-system/babel-plugins/log-module-metadata.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @fileoverview Definitions of logging methods for transforms and linting. */
 
 /**
diff --git a/build-system/babel-plugins/static-template-metadata.js b/build-system/babel-plugins/static-template-metadata.js
index ca1e764270f1..2182f293cc69 100644
--- a/build-system/babel-plugins/static-template-metadata.js
+++ b/build-system/babel-plugins/static-template-metadata.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** Metadata for static template functions `htmlFor` and `svgFor`. */
 
 /**
diff --git a/build-system/babel-plugins/testSetupFile.js b/build-system/babel-plugins/testSetupFile.js
index 856ea3b4bdd4..77f69c87e7fa 100644
--- a/build-system/babel-plugins/testSetupFile.js
+++ b/build-system/babel-plugins/testSetupFile.js
@@ -1,17 +1 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 jest.setTimeout(10000); // eslint-disable-line no-undef
diff --git a/build-system/common/check-package-manager.js b/build-system/common/check-package-manager.js
index bf4190b9936c..8c7d8317a4b7 100644
--- a/build-system/common/check-package-manager.js
+++ b/build-system/common/check-package-manager.js
@@ -1,19 +1,5 @@
 #!/usr/bin/env node
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 'use strict';
 
 /**
diff --git a/build-system/common/ci.js b/build-system/common/ci.js
index c28b84080299..55cd34a2fabb 100644
--- a/build-system/common/ci.js
+++ b/build-system/common/ci.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/common/colors.js b/build-system/common/colors.js
index b437edff8187..b81e4a0d98b3 100644
--- a/build-system/common/colors.js
+++ b/build-system/common/colors.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const colors = require('kleur/colors');
 
 /**
diff --git a/build-system/common/ctrlcHandler.js b/build-system/common/ctrlcHandler.js
index 28e526c1313d..28bf8e9ad3ed 100644
--- a/build-system/common/ctrlcHandler.js
+++ b/build-system/common/ctrlcHandler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const colors = require('./colors');
 const {exec, execScriptAsync} = require('./exec');
 const {logLocalDev} = require('./logging');
diff --git a/build-system/common/debounce.js b/build-system/common/debounce.js
index c2cf45c376b8..0f1ee42b511b 100644
--- a/build-system/common/debounce.js
+++ b/build-system/common/debounce.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const lodashDebounce = require('lodash.debounce');
 
 /**
diff --git a/build-system/common/diff.js b/build-system/common/diff.js
index 1ab7bb559659..e14c24c79332 100644
--- a/build-system/common/diff.js
+++ b/build-system/common/diff.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const argv = require('minimist')(process.argv.slice(2));
 const tempy = require('tempy');
 const {blue, bold, cyan, red} = require('./colors');
diff --git a/build-system/common/esbuild-babel.js b/build-system/common/esbuild-babel.js
index 708f059e4503..020862bb8a5e 100644
--- a/build-system/common/esbuild-babel.js
+++ b/build-system/common/esbuild-babel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const babel = require('@babel/core');
 const path = require('path');
 const {debug} = require('../compile/debug-compilation-lifecycle');
diff --git a/build-system/common/exec.js b/build-system/common/exec.js
index 3e3e535eb65f..0b35c3fb10e9 100644
--- a/build-system/common/exec.js
+++ b/build-system/common/exec.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/common/git.js b/build-system/common/git.js
index 6e0d52e07611..3b85564ee142 100644
--- a/build-system/common/git.js
+++ b/build-system/common/git.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/common/logging.js b/build-system/common/logging.js
index 765b8e81f63d..41d6baf95889 100644
--- a/build-system/common/logging.js
+++ b/build-system/common/logging.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {bold, gray, yellow} = require('./colors');
diff --git a/build-system/common/npm-checks.js b/build-system/common/npm-checks.js
index fcdcb30a19f1..eb8622309aaa 100644
--- a/build-system/common/npm-checks.js
+++ b/build-system/common/npm-checks.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/common/process.js b/build-system/common/process.js
index 88ad0b06391a..a6426c48b224 100644
--- a/build-system/common/process.js
+++ b/build-system/common/process.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/common/transform-cache.js b/build-system/common/transform-cache.js
index 2434fa98552c..d8650a57c23e 100644
--- a/build-system/common/transform-cache.js
+++ b/build-system/common/transform-cache.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const crypto = require('crypto');
 const fs = require('fs-extra');
 const path = require('path');
diff --git a/build-system/common/update-packages.js b/build-system/common/update-packages.js
index a01da3eb0799..fb6563e2e73b 100644
--- a/build-system/common/update-packages.js
+++ b/build-system/common/update-packages.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const checkDependencies = require('check-dependencies');
diff --git a/build-system/common/update-session-issues/index.js b/build-system/common/update-session-issues/index.js
index 26b110f3b0de..dc8c7815db42 100644
--- a/build-system/common/update-session-issues/index.js
+++ b/build-system/common/update-session-issues/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview
  * Updates Github issues for scheduled public sessions, like
diff --git a/build-system/common/update-session-issues/template/design-review.js b/build-system/common/update-session-issues/template/design-review.js
index 96c357d55ac0..e19a030776e6 100644
--- a/build-system/common/update-session-issues/template/design-review.js
+++ b/build-system/common/update-session-issues/template/design-review.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const sessionDurationHours = 1;
 
 /**
diff --git a/build-system/common/update-session-issues/types.js b/build-system/common/update-session-issues/types.js
index 1c83301434d2..d721dec57002 100644
--- a/build-system/common/update-session-issues/types.js
+++ b/build-system/common/update-session-issues/types.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @typedef {0|1|2|3|4|5|6} */
 let DayOfWeekDef; // sunday = 0, monday = 1, ...
 
diff --git a/build-system/common/utils.js b/build-system/common/utils.js
index 3f32ce4fa114..4c131d9eada5 100644
--- a/build-system/common/utils.js
+++ b/build-system/common/utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const argv = require('minimist')(process.argv.slice(2));
 const experimentsConfig = require('../global-configs/experiments-config.json');
 const fs = require('fs-extra');
diff --git a/build-system/compile/build-constants.js b/build-system/compile/build-constants.js
index dc7bedcbce34..d87e8804a048 100644
--- a/build-system/compile/build-constants.js
+++ b/build-system/compile/build-constants.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const argv = require('minimist')(process.argv.slice(2));
 const {VERSION} = require('./internal-version');
 
diff --git a/build-system/compile/bundles.config.js b/build-system/compile/bundles.config.js
index 729cccc3045b..d78788ff3116 100644
--- a/build-system/compile/bundles.config.js
+++ b/build-system/compile/bundles.config.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 const extensionBundles = require('./bundles.config.extensions.json');
 const wrappers = require('./compile-wrappers');
diff --git a/build-system/compile/check-for-unknown-deps.js b/build-system/compile/check-for-unknown-deps.js
index 1008216bd38e..b08547056061 100644
--- a/build-system/compile/check-for-unknown-deps.js
+++ b/build-system/compile/check-for-unknown-deps.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/compile/closure-compile.js b/build-system/compile/closure-compile.js
index a59c11399ccb..f362bcf7b0f1 100644
--- a/build-system/compile/closure-compile.js
+++ b/build-system/compile/closure-compile.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const compiler = require('@ampproject/google-closure-compiler');
diff --git a/build-system/compile/compile-wrappers.js b/build-system/compile/compile-wrappers.js
index cfc93925dfa9..5f0ed7c6ec23 100644
--- a/build-system/compile/compile-wrappers.js
+++ b/build-system/compile/compile-wrappers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const {VERSION} = require('./internal-version');
 
 // If there is a sync JS error during initial load,
diff --git a/build-system/compile/compile.js b/build-system/compile/compile.js
index 92fc1e37292f..0ae495a5ecfc 100644
--- a/build-system/compile/compile.js
+++ b/build-system/compile/compile.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 const argv = require('minimist')(process.argv.slice(2));
 const del = require('del');
diff --git a/build-system/compile/debug-compilation-lifecycle.js b/build-system/compile/debug-compilation-lifecycle.js
index b4bd8191ee68..c2a4b41bfe4d 100644
--- a/build-system/compile/debug-compilation-lifecycle.js
+++ b/build-system/compile/debug-compilation-lifecycle.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 const argv = require('minimist')(process.argv.slice(2));
 const fs = require('fs');
diff --git a/build-system/compile/helpers.js b/build-system/compile/helpers.js
index 2ac23bfe5402..82b9bf3b5107 100644
--- a/build-system/compile/helpers.js
+++ b/build-system/compile/helpers.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/compile/internal-version.js b/build-system/compile/internal-version.js
index 64f5a93edc5f..6467038d19d9 100644
--- a/build-system/compile/internal-version.js
+++ b/build-system/compile/internal-version.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const minimist = require('minimist');
diff --git a/build-system/compile/log-messages.js b/build-system/compile/log-messages.js
index 92b49345691e..ef6260bc39b6 100644
--- a/build-system/compile/log-messages.js
+++ b/build-system/compile/log-messages.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const argv = require('minimist')(process.argv.slice(2));
 const fs = require('fs-extra');
 const {cyan} = require('../common/colors');
diff --git a/build-system/compile/post-closure-babel.js b/build-system/compile/post-closure-babel.js
index 976eac71ce48..d52e947aedec 100644
--- a/build-system/compile/post-closure-babel.js
+++ b/build-system/compile/post-closure-babel.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 const argv = require('minimist')(process.argv.slice(2));
 const babel = require('@babel/core');
diff --git a/build-system/compile/pre-closure-babel.js b/build-system/compile/pre-closure-babel.js
index 6f385e176209..cc63b207265e 100644
--- a/build-system/compile/pre-closure-babel.js
+++ b/build-system/compile/pre-closure-babel.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const babel = require('@babel/core');
diff --git a/build-system/compile/sanitize.js b/build-system/compile/sanitize.js
index 19dfe229d727..d34a5b1cbc82 100644
--- a/build-system/compile/sanitize.js
+++ b/build-system/compile/sanitize.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/compile/sources.js b/build-system/compile/sources.js
index 1e25ae81ecce..8e19ddc383a8 100644
--- a/build-system/compile/sources.js
+++ b/build-system/compile/sources.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview This file contains all the globs required for babel
  * transformation and for closure compilation. Try and maintain the glob
diff --git a/build-system/eslint-rules/.eslintrc.js b/build-system/eslint-rules/.eslintrc.js
index deff6342c31d..2d02cb72b2e1 100644
--- a/build-system/eslint-rules/.eslintrc.js
+++ b/build-system/eslint-rules/.eslintrc.js
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 module.exports = {
   'plugins': ['eslint-plugin'],
diff --git a/build-system/eslint-rules/always-call-chai-methods.js b/build-system/eslint-rules/always-call-chai-methods.js
index 41889a4badbc..85a8b9be0ba7 100644
--- a/build-system/eslint-rules/always-call-chai-methods.js
+++ b/build-system/eslint-rules/always-call-chai-methods.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 // We need a full database of possible Chai assertions to figure out what to
diff --git a/build-system/eslint-rules/await-expect.js b/build-system/eslint-rules/await-expect.js
index 8e2eb02beffe..be30f7b5579b 100644
--- a/build-system/eslint-rules/await-expect.js
+++ b/build-system/eslint-rules/await-expect.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/eslint-rules/closure-type-primitives.js b/build-system/eslint-rules/closure-type-primitives.js
index e934768aaf6f..3f0aa0d5896d 100644
--- a/build-system/eslint-rules/closure-type-primitives.js
+++ b/build-system/eslint-rules/closure-type-primitives.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const doctrine = require('@jridgewell/doctrine');
diff --git a/build-system/eslint-rules/dict-string-keys.js b/build-system/eslint-rules/dict-string-keys.js
index d3c5c97b6a58..1c00f978bc09 100644
--- a/build-system/eslint-rules/dict-string-keys.js
+++ b/build-system/eslint-rules/dict-string-keys.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = function (context) {
diff --git a/build-system/eslint-rules/forbidden-terms-config.js b/build-system/eslint-rules/forbidden-terms-config.js
index 8e2256e61f70..552208539c21 100644
--- a/build-system/eslint-rules/forbidden-terms-config.js
+++ b/build-system/eslint-rules/forbidden-terms-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const {readFileSync} = require('fs');
 
 /**
diff --git a/build-system/eslint-rules/get-mode-usage.js b/build-system/eslint-rules/get-mode-usage.js
index bcbfd02fe3d2..ca459bbfdf13 100644
--- a/build-system/eslint-rules/get-mode-usage.js
+++ b/build-system/eslint-rules/get-mode-usage.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 // This rule asserts that we only grab properties from getMode(), and never
diff --git a/build-system/eslint-rules/html-template.js b/build-system/eslint-rules/html-template.js
index 708fefc42a49..fd033b1f384c 100644
--- a/build-system/eslint-rules/html-template.js
+++ b/build-system/eslint-rules/html-template.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {
diff --git a/build-system/eslint-rules/index.js b/build-system/eslint-rules/index.js
index 1501966595e7..8aad2b29f8d9 100644
--- a/build-system/eslint-rules/index.js
+++ b/build-system/eslint-rules/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const fs = require('fs');
diff --git a/build-system/eslint-rules/is-experiment-on.js b/build-system/eslint-rules/is-experiment-on.js
index 76b33c0eea95..5841e6fe313f 100644
--- a/build-system/eslint-rules/is-experiment-on.js
+++ b/build-system/eslint-rules/is-experiment-on.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = function (context) {
diff --git a/build-system/eslint-rules/json-configuration.js b/build-system/eslint-rules/json-configuration.js
index 6a9af9c2d5a2..aad7f6573c4b 100644
--- a/build-system/eslint-rules/json-configuration.js
+++ b/build-system/eslint-rules/json-configuration.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/eslint-rules/jss-animation-name.js b/build-system/eslint-rules/jss-animation-name.js
index 291a55925ebb..15435c101ca1 100644
--- a/build-system/eslint-rules/jss-animation-name.js
+++ b/build-system/eslint-rules/jss-animation-name.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/eslint-rules/no-array-destructuring.js b/build-system/eslint-rules/no-array-destructuring.js
new file mode 100644
index 000000000000..929109b8b641
--- /dev/null
+++ b/build-system/eslint-rules/no-array-destructuring.js
@@ -0,0 +1,69 @@
+'use strict';
+
+// Only allow array destructuring on preact functions that are known to return
+// real arrays. This is to avoid the very large iterator polyfill and the very
+// slow native and polyfilled runtime.
+//
+// Good:
+// const [first] = useXYZ(0);
+// const [x] = preact.useXYZ(0);
+//
+// Bad:
+// const [b] = value;
+// function bad([b]) {}
+module.exports = function (context) {
+  /**
+   * @param {*} node
+   * @return {boolean}
+   */
+  function isAllowed(node) {
+    const {parent} = node;
+    if (parent.type !== 'VariableDeclarator') {
+      return false;
+    }
+    const {init} = parent;
+
+    if (!init || init.type !== 'CallExpression') {
+      return false;
+    }
+
+    const {callee} = init;
+
+    if (callee.type === 'Identifier') {
+      return callee.name.startsWith('use');
+    }
+
+    if (callee.type === 'MemberExpression') {
+      const {computed, object, property} = callee;
+      if (computed) {
+        return false;
+      }
+      if (
+        object.type !== 'Identifier' ||
+        object.name.toLowerCase() !== 'preact'
+      ) {
+        return false;
+      }
+      if (property.type !== 'Identifier' || !property.name.startsWith('use')) {
+        return false;
+      }
+      return true;
+    }
+
+    return false;
+  }
+
+  return {
+    ArrayPattern: function (node) {
+      if (isAllowed(node)) {
+        return;
+      }
+
+      context.report({
+        node,
+        message:
+          'Array Destructuring is only allowed on known array-returning preact hooks',
+      });
+    },
+  };
+};
diff --git a/build-system/eslint-rules/no-arrow-on-register-functions.js b/build-system/eslint-rules/no-arrow-on-register-functions.js
index 1e65537e5071..b48ede2ad741 100644
--- a/build-system/eslint-rules/no-arrow-on-register-functions.js
+++ b/build-system/eslint-rules/no-arrow-on-register-functions.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const expression = [
diff --git a/build-system/eslint-rules/no-bigint.js b/build-system/eslint-rules/no-bigint.js
index 73ab637f2c1d..0050660c6d9f 100644
--- a/build-system/eslint-rules/no-bigint.js
+++ b/build-system/eslint-rules/no-bigint.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = function (context) {
diff --git a/build-system/eslint-rules/no-deep-destructuring.js b/build-system/eslint-rules/no-deep-destructuring.js
index 92c31affb1c1..06b034fc79e2 100644
--- a/build-system/eslint-rules/no-deep-destructuring.js
+++ b/build-system/eslint-rules/no-deep-destructuring.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/eslint-rules/no-duplicate-import.js b/build-system/eslint-rules/no-duplicate-import.js
index a32c4b40f0a9..785374dc6b15 100644
--- a/build-system/eslint-rules/no-duplicate-import.js
+++ b/build-system/eslint-rules/no-duplicate-import.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 // Enforces imports statements from a module are not duplicated
diff --git a/build-system/eslint-rules/no-duplicate-name-typedef.js b/build-system/eslint-rules/no-duplicate-name-typedef.js
index 2db0b1b65090..ebf2814c6f20 100644
--- a/build-system/eslint-rules/no-duplicate-name-typedef.js
+++ b/build-system/eslint-rules/no-duplicate-name-typedef.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 // Global cache of typedefName: typedefLocation.
diff --git a/build-system/eslint-rules/no-dynamic-import.js b/build-system/eslint-rules/no-dynamic-import.js
index 777545f9c1ab..dcd75ac6bc02 100644
--- a/build-system/eslint-rules/no-dynamic-import.js
+++ b/build-system/eslint-rules/no-dynamic-import.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = function (context) {
diff --git a/build-system/eslint-rules/no-es2015-number-props.js b/build-system/eslint-rules/no-es2015-number-props.js
index c8e6cdd1d167..a2d5d75f38aa 100644
--- a/build-system/eslint-rules/no-es2015-number-props.js
+++ b/build-system/eslint-rules/no-es2015-number-props.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const INVALID_PROPS = [
diff --git a/build-system/eslint-rules/no-export-side-effect.js b/build-system/eslint-rules/no-export-side-effect.js
index b843124cef50..391ece7d900e 100644
--- a/build-system/eslint-rules/no-export-side-effect.js
+++ b/build-system/eslint-rules/no-export-side-effect.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = function (context) {
diff --git a/build-system/eslint-rules/no-forbidden-terms.js b/build-system/eslint-rules/no-forbidden-terms.js
index 2bc32abbb29b..d5e584d582cc 100644
--- a/build-system/eslint-rules/no-forbidden-terms.js
+++ b/build-system/eslint-rules/no-forbidden-terms.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const {cyan} = require('../common/colors');
 const {matchForbiddenTerms} = require('../test-configs/forbidden-terms');
 const {relative} = require('path');
diff --git a/build-system/eslint-rules/no-function-async.js b/build-system/eslint-rules/no-function-async.js
index 85d82eec8e2a..d958f3c7db9c 100644
--- a/build-system/eslint-rules/no-function-async.js
+++ b/build-system/eslint-rules/no-function-async.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = function (context) {
diff --git a/build-system/eslint-rules/no-function-generator.js b/build-system/eslint-rules/no-function-generator.js
index 453d448ee3c6..258ee4bb0109 100644
--- a/build-system/eslint-rules/no-function-generator.js
+++ b/build-system/eslint-rules/no-function-generator.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = function (context) {
diff --git a/build-system/eslint-rules/no-global.js b/build-system/eslint-rules/no-global.js
index 690c6d6b4212..ac9af4dd9235 100644
--- a/build-system/eslint-rules/no-global.js
+++ b/build-system/eslint-rules/no-global.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const astUtils = require('eslint/lib/rules/utils/ast-utils');
diff --git a/build-system/eslint-rules/no-has-own-property-method.js b/build-system/eslint-rules/no-has-own-property-method.js
index 242ad20295a9..eed1a8e8368a 100644
--- a/build-system/eslint-rules/no-has-own-property-method.js
+++ b/build-system/eslint-rules/no-has-own-property-method.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = {
diff --git a/build-system/eslint-rules/no-import-meta.js b/build-system/eslint-rules/no-import-meta.js
index 797207dd071b..11018c0b1e1a 100644
--- a/build-system/eslint-rules/no-import-meta.js
+++ b/build-system/eslint-rules/no-import-meta.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = function (context) {
diff --git a/build-system/eslint-rules/no-import-rename.js b/build-system/eslint-rules/no-import-rename.js
index 8129a1da0373..dc32bb10a6e6 100644
--- a/build-system/eslint-rules/no-import-rename.js
+++ b/build-system/eslint-rules/no-import-rename.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const path = require('path');
diff --git a/build-system/eslint-rules/no-import.js b/build-system/eslint-rules/no-import.js
index 8921345a50ec..b1b635ada028 100644
--- a/build-system/eslint-rules/no-import.js
+++ b/build-system/eslint-rules/no-import.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const imports = [
diff --git a/build-system/eslint-rules/no-invalid-this.js b/build-system/eslint-rules/no-invalid-this.js
index ec4e2c82f915..1d21c41f346b 100644
--- a/build-system/eslint-rules/no-invalid-this.js
+++ b/build-system/eslint-rules/no-invalid-this.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 // Disables use of the `this` value when we suspect that it is using the
diff --git a/build-system/eslint-rules/no-log-array.js b/build-system/eslint-rules/no-log-array.js
index b53386e9c40a..f0b12852cca3 100644
--- a/build-system/eslint-rules/no-log-array.js
+++ b/build-system/eslint-rules/no-log-array.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const {
   assertAliases,
   definitionFile,
diff --git a/build-system/eslint-rules/no-mixed-interpolation.js b/build-system/eslint-rules/no-mixed-interpolation.js
index ce45d062d450..d5c51d8bc802 100644
--- a/build-system/eslint-rules/no-mixed-interpolation.js
+++ b/build-system/eslint-rules/no-mixed-interpolation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const {
   assertAliases,
   definitionFile,
diff --git a/build-system/eslint-rules/no-mixed-operators.js b/build-system/eslint-rules/no-mixed-operators.js
index 6b1d249399c9..ee89504c8fe0 100644
--- a/build-system/eslint-rules/no-mixed-operators.js
+++ b/build-system/eslint-rules/no-mixed-operators.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = {
diff --git a/build-system/eslint-rules/no-module-exports.js b/build-system/eslint-rules/no-module-exports.js
index 2c7bcfa3a887..cac307e6ea17 100644
--- a/build-system/eslint-rules/no-module-exports.js
+++ b/build-system/eslint-rules/no-module-exports.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 'use strict';
 
 //------------------------------------------------------------------------------
diff --git a/build-system/eslint-rules/no-private-props.js b/build-system/eslint-rules/no-private-props.js
index 4772bf69552d..f6d312e1b7ec 100644
--- a/build-system/eslint-rules/no-private-props.js
+++ b/build-system/eslint-rules/no-private-props.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/eslint-rules/no-rest.js b/build-system/eslint-rules/no-rest.js
new file mode 100644
index 000000000000..9a47c4c2e21f
--- /dev/null
+++ b/build-system/eslint-rules/no-rest.js
@@ -0,0 +1,25 @@
+'use strict';
+
+// Forbids use of Rest elements when they require an iterator polyfill, or
+// there's no clear benefit.
+//
+// Good:
+// ```
+// function foo(...args) {}
+// const {...rest} = {foo: 1};
+// ```
+//
+// Bad:
+// ```
+// const [...rest] = [1, 2, 3];
+// ```
+module.exports = function (context) {
+  return {
+    'ArrayPattern > RestElement': function (node) {
+      context.report({
+        node,
+        message: 'Collecting elements using a rest element is not allowed.',
+      });
+    },
+  };
+};
diff --git a/build-system/eslint-rules/no-spread.js b/build-system/eslint-rules/no-spread.js
new file mode 100644
index 000000000000..ce420d2ff81d
--- /dev/null
+++ b/build-system/eslint-rules/no-spread.js
@@ -0,0 +1,25 @@
+'use strict';
+
+// Forbids use of Spread elements when they require an iterator polyfill
+//
+// Good:
+// ```
+// const obj = {foo: 1, ...obj};
+// ```
+//
+// Bad:
+// ```
+// const args = [1, 2, 3, ...array];
+// bar(...args);
+// ```
+module.exports = function (context) {
+  return {
+    'ArrayExpression > SpreadElement': function (node) {
+      context.report({node, message: 'Iterator spreading is not allowed.'});
+    },
+
+    'CallExpression > SpreadElement': function (node) {
+      context.report({node, message: 'Iterator spreading is not allowed.'});
+    },
+  };
+};
diff --git a/build-system/eslint-rules/no-static-this.js b/build-system/eslint-rules/no-static-this.js
index ae49eb360cf4..570c5a3e4e64 100644
--- a/build-system/eslint-rules/no-static-this.js
+++ b/build-system/eslint-rules/no-static-this.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 // Forbids use of `this` inside static class methods
diff --git a/build-system/eslint-rules/no-style-display.js b/build-system/eslint-rules/no-style-display.js
index 44ee933867e7..54641d1d6d0b 100644
--- a/build-system/eslint-rules/no-style-display.js
+++ b/build-system/eslint-rules/no-style-display.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = function (context) {
diff --git a/build-system/eslint-rules/no-style-property-setting.js b/build-system/eslint-rules/no-style-property-setting.js
index 01e7aec0fbcf..b2681cfac012 100644
--- a/build-system/eslint-rules/no-style-property-setting.js
+++ b/build-system/eslint-rules/no-style-property-setting.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const path = require('path');
diff --git a/build-system/eslint-rules/no-swallow-return-from-allow-console-error.js b/build-system/eslint-rules/no-swallow-return-from-allow-console-error.js
index 2a2595914ab9..8303321ec010 100644
--- a/build-system/eslint-rules/no-swallow-return-from-allow-console-error.js
+++ b/build-system/eslint-rules/no-swallow-return-from-allow-console-error.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = {
diff --git a/build-system/eslint-rules/no-unload-listener.js b/build-system/eslint-rules/no-unload-listener.js
index 33b2cbaa39d0..3197adac3096 100644
--- a/build-system/eslint-rules/no-unload-listener.js
+++ b/build-system/eslint-rules/no-unload-listener.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = function (context) {
diff --git a/build-system/eslint-rules/objstr-literal.js b/build-system/eslint-rules/objstr-literal.js
index 8234480200b0..9e486df79ad5 100644
--- a/build-system/eslint-rules/objstr-literal.js
+++ b/build-system/eslint-rules/objstr-literal.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 module.exports = function objstrLiteral(context) {
   return {
     CallExpression(node) {
diff --git a/build-system/eslint-rules/preact.js b/build-system/eslint-rules/preact.js
index a9638dd38030..b4f9e33f77a2 100644
--- a/build-system/eslint-rules/preact.js
+++ b/build-system/eslint-rules/preact.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const path = require('path');
diff --git a/build-system/eslint-rules/prefer-deferred-promise.js b/build-system/eslint-rules/prefer-deferred-promise.js
index 0df568215eeb..1f5d7d9f81c1 100644
--- a/build-system/eslint-rules/prefer-deferred-promise.js
+++ b/build-system/eslint-rules/prefer-deferred-promise.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = function (context) {
diff --git a/build-system/eslint-rules/prefer-destructuring.js b/build-system/eslint-rules/prefer-destructuring.js
index 79760201335c..05a98042bce7 100644
--- a/build-system/eslint-rules/prefer-destructuring.js
+++ b/build-system/eslint-rules/prefer-destructuring.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = {
diff --git a/build-system/eslint-rules/prefer-spread-props.js b/build-system/eslint-rules/prefer-spread-props.js
index bf45e0b29723..e02149e03248 100644
--- a/build-system/eslint-rules/prefer-spread-props.js
+++ b/build-system/eslint-rules/prefer-spread-props.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 // This warns when using Object.assign where an object spread is better. Note
diff --git a/build-system/eslint-rules/prefer-unnested-spread-objects.js b/build-system/eslint-rules/prefer-unnested-spread-objects.js
index 0d7f6c59652b..3197d8dfa512 100644
--- a/build-system/eslint-rules/prefer-unnested-spread-objects.js
+++ b/build-system/eslint-rules/prefer-unnested-spread-objects.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 // Disallows using an object spread on an inline object expression. Instead,
diff --git a/build-system/eslint-rules/private-prop-names.js b/build-system/eslint-rules/private-prop-names.js
index 7fbf9da26614..c326b825be00 100644
--- a/build-system/eslint-rules/private-prop-names.js
+++ b/build-system/eslint-rules/private-prop-names.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/eslint-rules/query-selector.js b/build-system/eslint-rules/query-selector.js
index 6808bc735dc2..be04019f3ff2 100644
--- a/build-system/eslint-rules/query-selector.js
+++ b/build-system/eslint-rules/query-selector.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const cssWhat = require('css-what');
diff --git a/build-system/eslint-rules/todo-format.js b/build-system/eslint-rules/todo-format.js
index b57c39c4f22a..67b6118353ea 100644
--- a/build-system/eslint-rules/todo-format.js
+++ b/build-system/eslint-rules/todo-format.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = function (context) {
diff --git a/build-system/eslint-rules/unused-private-field.js b/build-system/eslint-rules/unused-private-field.js
index c63215294da6..43b0a44c7a45 100644
--- a/build-system/eslint-rules/unused-private-field.js
+++ b/build-system/eslint-rules/unused-private-field.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = {
diff --git a/build-system/eslint-rules/vsync.js b/build-system/eslint-rules/vsync.js
index 5a875e873ed1..8ddce819c73b 100644
--- a/build-system/eslint-rules/vsync.js
+++ b/build-system/eslint-rules/vsync.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = function (context) {
diff --git a/build-system/eslint-rules/window-property-name.js b/build-system/eslint-rules/window-property-name.js
index 3bda1f4573fc..52e2dce53837 100644
--- a/build-system/eslint-rules/window-property-name.js
+++ b/build-system/eslint-rules/window-property-name.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview
  * Checks that custom properties set on the window are prefixed with '__AMP_'.
diff --git a/build-system/externs/amp.extern.js b/build-system/externs/amp.extern.js
index 41a37001eb35..d93bcf2829b4 100644
--- a/build-system/externs/amp.extern.js
+++ b/build-system/externs/amp.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /**
diff --git a/build-system/externs/dompurify.extern.js b/build-system/externs/dompurify.extern.js
index 648eaae6b09a..1a34e4432797 100644
--- a/build-system/externs/dompurify.extern.js
+++ b/build-system/externs/dompurify.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @constructor */
diff --git a/build-system/externs/layout-jank.extern.js b/build-system/externs/layout-jank.extern.js
index 938242a3d6c8..170e3774fbb1 100644
--- a/build-system/externs/layout-jank.extern.js
+++ b/build-system/externs/layout-jank.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Definitions for the Layout Jank API.
  *
diff --git a/build-system/externs/preact.extern.js b/build-system/externs/preact.extern.js
index 1a435e13777e..35d1bf8cf85f 100644
--- a/build-system/externs/preact.extern.js
+++ b/build-system/externs/preact.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/build-system/npm-publish/build-npm-binaries.js b/build-system/npm-publish/build-npm-binaries.js
index a8ab9b87a85d..66fc56dec898 100644
--- a/build-system/npm-publish/build-npm-binaries.js
+++ b/build-system/npm-publish/build-npm-binaries.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview
  * Builds npm binaries for specified Bento components.
diff --git a/build-system/npm-publish/get-extensions.js b/build-system/npm-publish/get-extensions.js
index fd277d41ccbe..0ed317bc7ab4 100644
--- a/build-system/npm-publish/get-extensions.js
+++ b/build-system/npm-publish/get-extensions.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview
  * Logs Bento components to publish.
diff --git a/build-system/npm-publish/utils.js b/build-system/npm-publish/utils.js
index e2b3d4ffe894..7b622c9318d9 100644
--- a/build-system/npm-publish/utils.js
+++ b/build-system/npm-publish/utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Get extensions to be published on npm
  * @return {Array<any>}
diff --git a/build-system/npm-publish/write-package-files.js b/build-system/npm-publish/write-package-files.js
index d628fc9853f6..68cb44440be1 100644
--- a/build-system/npm-publish/write-package-files.js
+++ b/build-system/npm-publish/write-package-files.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview
  * Creates npm package files for a given component and AMP version.
diff --git a/build-system/pr-check/browser-tests.js b/build-system/pr-check/browser-tests.js
index 1f73244f148f..99c455ddc875 100644
--- a/build-system/pr-check/browser-tests.js
+++ b/build-system/pr-check/browser-tests.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/build-targets.js b/build-system/pr-check/build-targets.js
index 6109cad96af6..59e77768b16a 100644
--- a/build-system/pr-check/build-targets.js
+++ b/build-system/pr-check/build-targets.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/bundle-size-module-build.js b/build-system/pr-check/bundle-size-module-build.js
index 6b329fe64aa6..541a8ac57453 100644
--- a/build-system/pr-check/bundle-size-module-build.js
+++ b/build-system/pr-check/bundle-size-module-build.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/bundle-size-nomodule-build.js b/build-system/pr-check/bundle-size-nomodule-build.js
index 5caa335c9aea..0aec6e19c46c 100644
--- a/build-system/pr-check/bundle-size-nomodule-build.js
+++ b/build-system/pr-check/bundle-size-nomodule-build.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/bundle-size.js b/build-system/pr-check/bundle-size.js
index 0c0b4a680549..154daa7f16f0 100644
--- a/build-system/pr-check/bundle-size.js
+++ b/build-system/pr-check/bundle-size.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/checks.js b/build-system/pr-check/checks.js
index 7f1f0d6ed639..be4e19750400 100644
--- a/build-system/pr-check/checks.js
+++ b/build-system/pr-check/checks.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/ci-job.js b/build-system/pr-check/ci-job.js
index 30b607f5176d..f9eb891b7377 100644
--- a/build-system/pr-check/ci-job.js
+++ b/build-system/pr-check/ci-job.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {
diff --git a/build-system/pr-check/cross-platform-builds.js b/build-system/pr-check/cross-platform-builds.js
index a560d40e88d5..0651f3a5b62b 100644
--- a/build-system/pr-check/cross-platform-builds.js
+++ b/build-system/pr-check/cross-platform-builds.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/e2e-tests.js b/build-system/pr-check/e2e-tests.js
index 94c7f2e9c1f4..d911d52fd24d 100644
--- a/build-system/pr-check/e2e-tests.js
+++ b/build-system/pr-check/e2e-tests.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/experiment-build.js b/build-system/pr-check/experiment-build.js
index 56bf47bfebbd..1b0f1c8d34ad 100644
--- a/build-system/pr-check/experiment-build.js
+++ b/build-system/pr-check/experiment-build.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/experiment-e2e-tests.js b/build-system/pr-check/experiment-e2e-tests.js
index 23248c983a4a..224ec6e5b9e4 100644
--- a/build-system/pr-check/experiment-e2e-tests.js
+++ b/build-system/pr-check/experiment-e2e-tests.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/experiment-integration-tests.js b/build-system/pr-check/experiment-integration-tests.js
index fd9b7df05868..5ddc62cc26a4 100644
--- a/build-system/pr-check/experiment-integration-tests.js
+++ b/build-system/pr-check/experiment-integration-tests.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/ie-tests.js b/build-system/pr-check/ie-tests.js
index b441e4d221e3..6ac7b7d70afe 100644
--- a/build-system/pr-check/ie-tests.js
+++ b/build-system/pr-check/ie-tests.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/module-build.js b/build-system/pr-check/module-build.js
index 74e047d006cd..a2147be6f4fc 100644
--- a/build-system/pr-check/module-build.js
+++ b/build-system/pr-check/module-build.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/module-tests.js b/build-system/pr-check/module-tests.js
index 719e854e33cd..d38e4f5cb820 100644
--- a/build-system/pr-check/module-tests.js
+++ b/build-system/pr-check/module-tests.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/nomodule-build.js b/build-system/pr-check/nomodule-build.js
index fa870ff02708..536549f559de 100644
--- a/build-system/pr-check/nomodule-build.js
+++ b/build-system/pr-check/nomodule-build.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/nomodule-tests.js b/build-system/pr-check/nomodule-tests.js
index dedb4f8863a3..18f588da17b9 100644
--- a/build-system/pr-check/nomodule-tests.js
+++ b/build-system/pr-check/nomodule-tests.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/performance-tests.js b/build-system/pr-check/performance-tests.js
index ff6c40fe2657..249a43125e0e 100644
--- a/build-system/pr-check/performance-tests.js
+++ b/build-system/pr-check/performance-tests.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/pr-deploy.js b/build-system/pr-check/pr-deploy.js
index 09f16fb18e62..00b151a449eb 100644
--- a/build-system/pr-check/pr-deploy.js
+++ b/build-system/pr-check/pr-deploy.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/unit-tests-local.js b/build-system/pr-check/unit-tests-local.js
index 183eb57e8af2..fa8052090088 100644
--- a/build-system/pr-check/unit-tests-local.js
+++ b/build-system/pr-check/unit-tests-local.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/unit-tests.js b/build-system/pr-check/unit-tests.js
index b9a586c3bd4e..46c2c5aa4276 100644
--- a/build-system/pr-check/unit-tests.js
+++ b/build-system/pr-check/unit-tests.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/unminified-build.js b/build-system/pr-check/unminified-build.js
index 539dfe87daa4..dc3c49292e91 100644
--- a/build-system/pr-check/unminified-build.js
+++ b/build-system/pr-check/unminified-build.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/unminified-tests.js b/build-system/pr-check/unminified-tests.js
index 8102e1f52c02..20aac2604ad2 100644
--- a/build-system/pr-check/unminified-tests.js
+++ b/build-system/pr-check/unminified-tests.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/utils.js b/build-system/pr-check/utils.js
index c0e9c3ea69fc..7057e0d5003a 100644
--- a/build-system/pr-check/utils.js
+++ b/build-system/pr-check/utils.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const fs = require('fs-extra');
diff --git a/build-system/pr-check/validator-tests.js b/build-system/pr-check/validator-tests.js
index 291ad06af946..a627bf446db8 100644
--- a/build-system/pr-check/validator-tests.js
+++ b/build-system/pr-check/validator-tests.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/pr-check/visual-diff-tests.js b/build-system/pr-check/visual-diff-tests.js
index bdde9f3e8fc9..a218a2960473 100644
--- a/build-system/pr-check/visual-diff-tests.js
+++ b/build-system/pr-check/visual-diff-tests.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/release-tagger/label-pull-requests.js b/build-system/release-tagger/label-pull-requests.js
index 70eebf00dbf8..1c6c70e8143d 100644
--- a/build-system/release-tagger/label-pull-requests.js
+++ b/build-system/release-tagger/label-pull-requests.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview
  * Update labels on pull requests for the release tagger.
diff --git a/build-system/release-tagger/make-release.js b/build-system/release-tagger/make-release.js
index 11dfc11abfb0..a235d343ca0e 100644
--- a/build-system/release-tagger/make-release.js
+++ b/build-system/release-tagger/make-release.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview
  * Make release for the release tagger.
diff --git a/build-system/release-tagger/test/label-pull-requests.test.js b/build-system/release-tagger/test/label-pull-requests.test.js
index ca4046ab4d03..9f281c33aaaf 100644
--- a/build-system/release-tagger/test/label-pull-requests.test.js
+++ b/build-system/release-tagger/test/label-pull-requests.test.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const nock = require('nock');
 const test = require('ava');
 const {addLabels, removeLabels} = require('../label-pull-requests');
diff --git a/build-system/release-tagger/test/make-release.test.js b/build-system/release-tagger/test/make-release.test.js
index 10186472888c..bc39c87f79aa 100644
--- a/build-system/release-tagger/test/make-release.test.js
+++ b/build-system/release-tagger/test/make-release.test.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const nock = require('nock');
 const test = require('ava');
 const {getExtensions} = require('../../npm-publish/utils');
diff --git a/build-system/release-tagger/test/update-release.test.js b/build-system/release-tagger/test/update-release.test.js
index 8efa139ecb32..78a1bdc0e1c7 100644
--- a/build-system/release-tagger/test/update-release.test.js
+++ b/build-system/release-tagger/test/update-release.test.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const nock = require('nock');
 const test = require('ava');
 const {publishRelease, rollbackRelease} = require('../update-release');
diff --git a/build-system/release-tagger/update-release.js b/build-system/release-tagger/update-release.js
index d1143c8635bc..51e3f678876a 100644
--- a/build-system/release-tagger/update-release.js
+++ b/build-system/release-tagger/update-release.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview
  * Update release for the release tagger.
diff --git a/build-system/release-tagger/utils.js b/build-system/release-tagger/utils.js
index 6574f9a90c70..e581cd6b4aae 100644
--- a/build-system/release-tagger/utils.js
+++ b/build-system/release-tagger/utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview
  * GitHub API util functions.
diff --git a/build-system/server/amp-cors.js b/build-system/server/amp-cors.js
index e66ca850fbd8..c02ef55c7d7e 100644
--- a/build-system/server/amp-cors.js
+++ b/build-system/server/amp-cors.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * In practice this would be *.ampproject.org and the publishers
  * origin. Please see AMP CORS docs for more details:
diff --git a/build-system/server/amp4test.js b/build-system/server/amp4test.js
index b85e70eeedcb..4bac37989340 100644
--- a/build-system/server/amp4test.js
+++ b/build-system/server/amp4test.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const app = require('express').Router();
diff --git a/build-system/server/app-index/amphtml-helpers.js b/build-system/server/app-index/amphtml-helpers.js
index feaccb8c01a9..b077099466c3 100644
--- a/build-system/server/app-index/amphtml-helpers.js
+++ b/build-system/server/app-index/amphtml-helpers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /* eslint-disable local/html-template */
 
 const assert = require('assert');
diff --git a/build-system/server/app-index/basepath-mappings.js b/build-system/server/app-index/basepath-mappings.js
index 844ffcea436c..b0207671f7d7 100644
--- a/build-system/server/app-index/basepath-mappings.js
+++ b/build-system/server/app-index/basepath-mappings.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Optional mappings of URL path to filesystem listing path.
 module.exports = {
   // Serve /examples/ on main page.
diff --git a/build-system/server/app-index/boilerplate.js b/build-system/server/app-index/boilerplate.js
index cfd1c6ab9a3a..4ddf1fe4f957 100644
--- a/build-system/server/app-index/boilerplate.js
+++ b/build-system/server/app-index/boilerplate.js
@@ -1,17 +1,2 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 module.exports =
   '<style amp-boilerplate>body{-webkit-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-moz-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-ms-animation:-amp-start 8s steps(1,end) 0s 1 normal both;animation:-amp-start 8s steps(1,end) 0s 1 normal both}@-webkit-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-moz-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-ms-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-o-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}</style><noscript><style amp-boilerplate>body{-webkit-animation:none;-moz-animation:none;-ms-animation:none;animation:none}</style></noscript>';
diff --git a/build-system/server/app-index/document-modes.js b/build-system/server/app-index/document-modes.js
index e406fe359bd6..830cfd66250c 100644
--- a/build-system/server/app-index/document-modes.js
+++ b/build-system/server/app-index/document-modes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 module.exports = {
   '/': 'standard',
   '/shadow/': 'shadow',
diff --git a/build-system/server/app-index/file-list.js b/build-system/server/app-index/file-list.js
index a5486692e25d..fb47d5f73af3 100644
--- a/build-system/server/app-index/file-list.js
+++ b/build-system/server/app-index/file-list.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /* eslint-disable local/html-template */
 const {html, joinFragments} = require('./html');
 const {htmlEnvelopePrefixKey} = require('./settings');
diff --git a/build-system/server/app-index/header-links.js b/build-system/server/app-index/header-links.js
index 60e6aba2f8cf..d6e9ffc669ce 100644
--- a/build-system/server/app-index/header-links.js
+++ b/build-system/server/app-index/header-links.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 module.exports = [
   {
     'name': 'Github',
diff --git a/build-system/server/app-index/html.js b/build-system/server/app-index/html.js
index 1cf6e743b1a3..33b92ce40677 100644
--- a/build-system/server/app-index/html.js
+++ b/build-system/server/app-index/html.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const identity = (a) => a;
 
 /**
diff --git a/build-system/server/app-index/index.js b/build-system/server/app-index/index.js
index 2e3822ece5ed..e99a5b477806 100644
--- a/build-system/server/app-index/index.js
+++ b/build-system/server/app-index/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const basepathMappings = require('./basepath-mappings');
diff --git a/build-system/server/app-index/main.css b/build-system/server/app-index/main.css
index cd8f9b21b076..f0e6ca94becb 100644
--- a/build-system/server/app-index/main.css
+++ b/build-system/server/app-index/main.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 body {
   font-family: -apple-system, system-ui, BlinkMacSystemFont, 'Segoe UI', Roboto,
     'Helvetica Neue', Arial, sans-serif;
diff --git a/build-system/server/app-index/proxy-form.js b/build-system/server/app-index/proxy-form.js
index df68048d3b0c..74ddaa7e51de 100644
--- a/build-system/server/app-index/proxy-form.js
+++ b/build-system/server/app-index/proxy-form.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 /* eslint-disable local/html-template */
 
 const {htmlEnvelopePrefixKey} = require('./settings');
diff --git a/build-system/server/app-index/regex.js b/build-system/server/app-index/regex.js
index 913d08b02c74..7caa5c34f2bc 100644
--- a/build-system/server/app-index/regex.js
+++ b/build-system/server/app-index/regex.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  *
  * @param {RegExp} regex
diff --git a/build-system/server/app-index/settings.js b/build-system/server/app-index/settings.js
index 253d438b7fba..faad9f4851c1 100644
--- a/build-system/server/app-index/settings.js
+++ b/build-system/server/app-index/settings.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 /* eslint-disable local/html-template */
 const documentModes = require('./document-modes');
 const {AmpState, ampStateKey} = require('./amphtml-helpers');
diff --git a/build-system/server/app-index/template.js b/build-system/server/app-index/template.js
index fca255ff6fdb..35c88550d759 100644
--- a/build-system/server/app-index/template.js
+++ b/build-system/server/app-index/template.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /* eslint-disable local/html-template */
 
 'use strict';
diff --git a/build-system/server/app-index/test/helpers.js b/build-system/server/app-index/test/helpers.js
index de52a8d66049..d53be8d94fca 100644
--- a/build-system/server/app-index/test/helpers.js
+++ b/build-system/server/app-index/test/helpers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const posthtml = require('posthtml');
 
 function getElementChildren(content) {
diff --git a/build-system/server/app-index/test/test-amphtml-helpers.js b/build-system/server/app-index/test/test-amphtml-helpers.js
index d4bab6b6046e..e9c4bf118a1e 100644
--- a/build-system/server/app-index/test/test-amphtml-helpers.js
+++ b/build-system/server/app-index/test/test-amphtml-helpers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const posthtml = require('posthtml');
 const test = require('ava');
 const {
diff --git a/build-system/server/app-index/test/test-file-list.js b/build-system/server/app-index/test/test-file-list.js
index 7d6c625157c3..7809a8f5aaf8 100644
--- a/build-system/server/app-index/test/test-file-list.js
+++ b/build-system/server/app-index/test/test-file-list.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const posthtml = require('posthtml');
 const test = require('ava');
 const {FileList} = require('../file-list');
diff --git a/build-system/server/app-index/test/test-html.js b/build-system/server/app-index/test/test-html.js
index 180aa2276e37..4b50513320e0 100644
--- a/build-system/server/app-index/test/test-html.js
+++ b/build-system/server/app-index/test/test-html.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const test = require('ava');
 const {html, joinFragments} = require('../html');
 
diff --git a/build-system/server/app-index/test/test.js b/build-system/server/app-index/test/test.js
index e97ded31a9f0..f33842582187 100644
--- a/build-system/server/app-index/test/test.js
+++ b/build-system/server/app-index/test/test.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const test = require('ava');
 const {serveIndexForTesting} = require('../');
 
diff --git a/build-system/server/app-index/url.js b/build-system/server/app-index/url.js
index 7e8beddcfef0..28078e1e4715 100644
--- a/build-system/server/app-index/url.js
+++ b/build-system/server/app-index/url.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const appendQueryParamsToUrl = (url, params) =>
   url +
   '?' +
diff --git a/build-system/server/app-index/util/listing.js b/build-system/server/app-index/util/listing.js
index 977d242b97c6..37ff208a815e 100644
--- a/build-system/server/app-index/util/listing.js
+++ b/build-system/server/app-index/util/listing.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const fs = require('fs');
diff --git a/build-system/server/app-utils.js b/build-system/server/app-utils.js
index 3f1145ce1d91..ae90bb11797d 100644
--- a/build-system/server/app-utils.js
+++ b/build-system/server/app-utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const minimist = require('minimist');
 const {cyan, green} = require('../common/colors');
 const {log} = require('../common/logging');
diff --git a/build-system/server/app-video-testbench.js b/build-system/server/app-video-testbench.js
index 10f67ba60d2a..983500f66a96 100644
--- a/build-system/server/app-video-testbench.js
+++ b/build-system/server/app-video-testbench.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 /* eslint-disable */
 'use strict';
 
diff --git a/build-system/server/app.js b/build-system/server/app.js
index 387a77a7ee77..0ff110155694 100644
--- a/build-system/server/app.js
+++ b/build-system/server/app.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/server/autocomplete-test-data.js b/build-system/server/autocomplete-test-data.js
index bfbf741e85b9..3b7f4c259b43 100644
--- a/build-system/server/autocomplete-test-data.js
+++ b/build-system/server/autocomplete-test-data.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const mentionEmails = [
   'harrypotter@hogwarts.edu',
   'albusdumbledore@hogwarts.edu',
diff --git a/build-system/server/lazy-build.js b/build-system/server/lazy-build.js
index c35f756a82f9..be5298ba60a6 100644
--- a/build-system/server/lazy-build.js
+++ b/build-system/server/lazy-build.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/server/new-server/router.js b/build-system/server/new-server/router.js
index 7122b2ed7450..cf8dfa58c9e7 100644
--- a/build-system/server/new-server/router.js
+++ b/build-system/server/new-server/router.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const router = require('express').Router();
 // @ts-ignore
 const {transform} = require('./transforms/dist/transform');
diff --git a/build-system/server/new-server/transforms/cdn/cdn-transform.ts b/build-system/server/new-server/transforms/cdn/cdn-transform.ts
index b3a72049fa21..315512c3114c 100644
--- a/build-system/server/new-server/transforms/cdn/cdn-transform.ts
+++ b/build-system/server/new-server/transforms/cdn/cdn-transform.ts
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 import posthtml from 'posthtml';
 import {
diff --git a/build-system/server/new-server/transforms/css/css-transform.ts b/build-system/server/new-server/transforms/css/css-transform.ts
index 7254f4951911..d76d0b1b5d62 100644
--- a/build-system/server/new-server/transforms/css/css-transform.ts
+++ b/build-system/server/new-server/transforms/css/css-transform.ts
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 import minimist from 'minimist';
 import posthtml from 'posthtml';
diff --git a/build-system/server/new-server/transforms/modules/modules-transform.ts b/build-system/server/new-server/transforms/modules/modules-transform.ts
index 01fb0f09dce8..1db4471e63ee 100644
--- a/build-system/server/new-server/transforms/modules/modules-transform.ts
+++ b/build-system/server/new-server/transforms/modules/modules-transform.ts
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 import posthtml from 'posthtml';
 import {isJsonScript, isValidScript, toExtension, ScriptNode, tryGetUrl} from '../utilities/cdn-tag';
diff --git a/build-system/server/new-server/transforms/sxg/sxg-transform.ts b/build-system/server/new-server/transforms/sxg/sxg-transform.ts
index eac833fdcf1f..75be878a2dff 100644
--- a/build-system/server/new-server/transforms/sxg/sxg-transform.ts
+++ b/build-system/server/new-server/transforms/sxg/sxg-transform.ts
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 import posthtml from 'posthtml';
 import {URL} from 'url';
diff --git a/build-system/server/new-server/transforms/transform.ts b/build-system/server/new-server/transforms/transform.ts
index e72ef3d3cd81..360ab893508e 100644
--- a/build-system/server/new-server/transforms/transform.ts
+++ b/build-system/server/new-server/transforms/transform.ts
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 import fs from 'fs';
 import minimist from 'minimist';
diff --git a/build-system/server/new-server/transforms/utilities/cdn-tag.ts b/build-system/server/new-server/transforms/utilities/cdn-tag.ts
index c00997002944..11224203624f 100644
--- a/build-system/server/new-server/transforms/utilities/cdn-tag.ts
+++ b/build-system/server/new-server/transforms/utilities/cdn-tag.ts
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 import posthtml from 'posthtml';
 import {URL} from 'url';
diff --git a/build-system/server/new-server/transforms/utilities/cdn.ts b/build-system/server/new-server/transforms/utilities/cdn.ts
index a0645440dd42..60a20a94eb29 100644
--- a/build-system/server/new-server/transforms/utilities/cdn.ts
+++ b/build-system/server/new-server/transforms/utilities/cdn.ts
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 import {URL} from 'url';
 import {parse, format, basename} from 'path';
diff --git a/build-system/server/new-server/transforms/utilities/option-set.ts b/build-system/server/new-server/transforms/utilities/option-set.ts
index 13dcaba2f868..c30fc4dd08db 100644
--- a/build-system/server/new-server/transforms/utilities/option-set.ts
+++ b/build-system/server/new-server/transforms/utilities/option-set.ts
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
  /**
  * A list of options to correspond with options.json for testing purposes.
diff --git a/build-system/server/recaptcha-router.js b/build-system/server/recaptcha-router.js
index 126edfc6727c..893774a1e908 100644
--- a/build-system/server/recaptcha-router.js
+++ b/build-system/server/recaptcha-router.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const argv = require('minimist')(process.argv.slice(2));
 const cors = require('./amp-cors');
 const pc = process;
diff --git a/build-system/server/routes/a4a-envelopes.js b/build-system/server/routes/a4a-envelopes.js
index ac097498467a..70ec8113a95a 100644
--- a/build-system/server/routes/a4a-envelopes.js
+++ b/build-system/server/routes/a4a-envelopes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const express = require('express');
 const fetch = require('node-fetch');
 const fs = require('fs');
diff --git a/build-system/server/routes/analytics.js b/build-system/server/routes/analytics.js
index 6ebc992db200..1a18a1ea2708 100644
--- a/build-system/server/routes/analytics.js
+++ b/build-system/server/routes/analytics.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const router = require('express').Router();
 const {log} = require('../amp4test');
 
diff --git a/build-system/server/routes/list.js b/build-system/server/routes/list.js
index 964820635c78..f7afce14a1b4 100644
--- a/build-system/server/routes/list.js
+++ b/build-system/server/routes/list.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const cors = require('../amp-cors');
 const router = require('express').Router();
 
diff --git a/build-system/server/routes/test.js b/build-system/server/routes/test.js
index e1dec034813a..1d76b8dc8c2b 100644
--- a/build-system/server/routes/test.js
+++ b/build-system/server/routes/test.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const router = require('express').Router();
 
 router.use('/form/post/success', function (req, res) {
diff --git a/build-system/server/shadow-viewer.js b/build-system/server/shadow-viewer.js
index 03a1c3478beb..4cd64d48e446 100644
--- a/build-system/server/shadow-viewer.js
+++ b/build-system/server/shadow-viewer.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 /* eslint-disable local/html-template */
 
 const {html} = require('./app-index/html');
diff --git a/build-system/server/test-server.js b/build-system/server/test-server.js
index cf39a5ac5331..7ff09d49ecbc 100644
--- a/build-system/server/test-server.js
+++ b/build-system/server/test-server.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/server/test/app-utils.test.js b/build-system/server/test/app-utils.test.js
index fea71832f91d..51e8a5db73a8 100644
--- a/build-system/server/test/app-utils.test.js
+++ b/build-system/server/test/app-utils.test.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const test = require('ava');
 const {replaceUrls, toInaboxDocument} = require('../app-utils');
 
diff --git a/build-system/server/typescript-compile.js b/build-system/server/typescript-compile.js
index c8505831a595..7a3b40fb8e44 100644
--- a/build-system/server/typescript-compile.js
+++ b/build-system/server/typescript-compile.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const esbuild = require('esbuild');
 const globby = require('globby');
 const path = require('path');
diff --git a/build-system/server/variable-substitution.js b/build-system/server/variable-substitution.js
index 9a5130af14c7..4bd9e83cd5cf 100644
--- a/build-system/server/variable-substitution.js
+++ b/build-system/server/variable-substitution.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 let url;
 let variableSubstitution;
 let variables;
diff --git a/build-system/status-page/comment.js b/build-system/status-page/comment.js
index 5afe5c427de5..97c74f52fc96 100644
--- a/build-system/status-page/comment.js
+++ b/build-system/status-page/comment.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview
  * Add progress comment for Stable and LTS cherry-picks
diff --git a/build-system/status-page/common.js b/build-system/status-page/common.js
index 65eccc562434..fa030e710d30 100644
--- a/build-system/status-page/common.js
+++ b/build-system/status-page/common.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview
  * Common functions for comment.js and incident.js
diff --git a/build-system/status-page/incident.js b/build-system/status-page/incident.js
index fb5df1da68bf..a94968ea54d1 100644
--- a/build-system/status-page/incident.js
+++ b/build-system/status-page/incident.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview
  * Sync status.amp.dev with cherry-pick progress
diff --git a/build-system/task-runner/amp-cli-runner.js b/build-system/task-runner/amp-cli-runner.js
index 192e52543743..79ede2f85364 100755
--- a/build-system/task-runner/amp-cli-runner.js
+++ b/build-system/task-runner/amp-cli-runner.js
@@ -1,19 +1,5 @@
 #!/usr/bin/env node
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 'use strict';
 
 /**
diff --git a/build-system/task-runner/amp-task-runner.js b/build-system/task-runner/amp-task-runner.js
index 8ed8fedc32d4..e416c87ca59e 100644
--- a/build-system/task-runner/amp-task-runner.js
+++ b/build-system/task-runner/amp-task-runner.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview This is a lightweight task runner with a one-file implentation
  * based on the commander npm package.
diff --git a/build-system/task-runner/install-amp-task-runner.js b/build-system/task-runner/install-amp-task-runner.js
index 197ba6668c6a..4d2d00ac3096 100644
--- a/build-system/task-runner/install-amp-task-runner.js
+++ b/build-system/task-runner/install-amp-task-runner.js
@@ -1,19 +1,5 @@
 #!/usr/bin/env node
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 'use strict';
 
 /**
diff --git a/build-system/tasks/3p-vendor-helpers.js b/build-system/tasks/3p-vendor-helpers.js
index ffb748417668..f9110821243f 100644
--- a/build-system/tasks/3p-vendor-helpers.js
+++ b/build-system/tasks/3p-vendor-helpers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const debounce = require('../common/debounce');
 const globby = require('globby');
 const {cyan, red} = require('../common/colors');
diff --git a/build-system/tasks/analytics-vendor-configs.js b/build-system/tasks/analytics-vendor-configs.js
index 85257f7cf520..628b8c7354f6 100644
--- a/build-system/tasks/analytics-vendor-configs.js
+++ b/build-system/tasks/analytics-vendor-configs.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const minimist = require('minimist');
 const argv = minimist(process.argv.slice(2));
 const debounce = require('../common/debounce');
diff --git a/build-system/tasks/ava.js b/build-system/tasks/ava.js
index d8b5f77b92d0..edf8c21f84f7 100644
--- a/build-system/tasks/ava.js
+++ b/build-system/tasks/ava.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/tasks/babel-plugin-tests.js b/build-system/tasks/babel-plugin-tests.js
index b2e476ae2152..92c0a03bc0ee 100644
--- a/build-system/tasks/babel-plugin-tests.js
+++ b/build-system/tasks/babel-plugin-tests.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const jest = require('@jest/core');
diff --git a/build-system/tasks/build.js b/build-system/tasks/build.js
index 81a3bc1f035b..dcfa971f8f14 100644
--- a/build-system/tasks/build.js
+++ b/build-system/tasks/build.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const {
   bootstrapThirdPartyFrames,
   compileAllJs,
diff --git a/build-system/tasks/bundle-size/index.js b/build-system/tasks/bundle-size/index.js
index 89512c1e173a..968214004190 100644
--- a/build-system/tasks/bundle-size/index.js
+++ b/build-system/tasks/bundle-size/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/tasks/caches-json.js b/build-system/tasks/caches-json.js
index 768dda4bbedf..fc43461e7abc 100644
--- a/build-system/tasks/caches-json.js
+++ b/build-system/tasks/caches-json.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const path = require('path');
diff --git a/build-system/tasks/check-analytics-vendors-list.js b/build-system/tasks/check-analytics-vendors-list.js
index 49e17bc057bb..a84f662eac0a 100644
--- a/build-system/tasks/check-analytics-vendors-list.js
+++ b/build-system/tasks/check-analytics-vendors-list.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const globby = require('globby');
 const {basename} = require('path');
 const {readFile} = require('fs-extra');
diff --git a/build-system/tasks/check-asserts.js b/build-system/tasks/check-asserts.js
index ccb4ec588010..4e38ad9691b2 100644
--- a/build-system/tasks/check-asserts.js
+++ b/build-system/tasks/check-asserts.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const fs = require('fs').promises;
diff --git a/build-system/tasks/check-build-system.js b/build-system/tasks/check-build-system.js
index 6ae372af8a6e..dc39c53751d8 100644
--- a/build-system/tasks/check-build-system.js
+++ b/build-system/tasks/check-build-system.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const globby = require('globby');
 const path = require('path');
 const {cyan, green} = require('../common/colors');
diff --git a/build-system/tasks/check-exact-versions.js b/build-system/tasks/check-exact-versions.js
index 8152390caa9d..3f3ddff0d556 100644
--- a/build-system/tasks/check-exact-versions.js
+++ b/build-system/tasks/check-exact-versions.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const fs = require('fs-extra');
diff --git a/build-system/tasks/check-invalid-whitespaces.js b/build-system/tasks/check-invalid-whitespaces.js
index 343f1e8b85de..02c15c70351c 100644
--- a/build-system/tasks/check-invalid-whitespaces.js
+++ b/build-system/tasks/check-invalid-whitespaces.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'using strict';
 
 const {getFilesToCheck} = require('../common/utils');
diff --git a/build-system/tasks/check-links.js b/build-system/tasks/check-links.js
index 35dca68ca409..c8b8e7f15bc5 100644
--- a/build-system/tasks/check-links.js
+++ b/build-system/tasks/check-links.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const fs = require('fs-extra');
diff --git a/build-system/tasks/check-owners.js b/build-system/tasks/check-owners.js
index 9fc2e3ab9f3e..5a104acb746f 100644
--- a/build-system/tasks/check-owners.js
+++ b/build-system/tasks/check-owners.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview This file implements the `amp check-owners` task, which checks
  * all OWNERS files in the repo for correctness, as determined by the parsing
diff --git a/build-system/tasks/check-renovate-config.js b/build-system/tasks/check-renovate-config.js
index 074d159e4972..620d04fefdf7 100644
--- a/build-system/tasks/check-renovate-config.js
+++ b/build-system/tasks/check-renovate-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview This file implements the `amp check-renovate-config` task,
  * which validates the Renovate configuration file using Renovate's provided
diff --git a/build-system/tasks/check-sourcemaps.js b/build-system/tasks/check-sourcemaps.js
index e9ae21eda77a..4f5b144db4a3 100644
--- a/build-system/tasks/check-sourcemaps.js
+++ b/build-system/tasks/check-sourcemaps.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/tasks/check-types.js b/build-system/tasks/check-types.js
index 42ee05949d93..f658f44cc5e3 100644
--- a/build-system/tasks/check-types.js
+++ b/build-system/tasks/check-types.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const argv = require('minimist')(process.argv.slice(2));
 const globby = require('globby');
 const {
diff --git a/build-system/tasks/check-video-interface-list.js b/build-system/tasks/check-video-interface-list.js
index 2e7546a10941..f39ffd599b1e 100644
--- a/build-system/tasks/check-video-interface-list.js
+++ b/build-system/tasks/check-video-interface-list.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const globby = require('globby');
 const {getStdout} = require('../common/process');
 const {readFile} = require('fs-extra');
diff --git a/build-system/tasks/cherry-pick.js b/build-system/tasks/cherry-pick.js
index 6ffef8ca3ef2..d50ebc130b2b 100644
--- a/build-system/tasks/cherry-pick.js
+++ b/build-system/tasks/cherry-pick.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/tasks/clean.js b/build-system/tasks/clean.js
index c924a5bc7349..0733ad10460d 100644
--- a/build-system/tasks/clean.js
+++ b/build-system/tasks/clean.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/tasks/codecov-upload.js b/build-system/tasks/codecov-upload.js
index 1bfd9b8d52d4..ddb8db972040 100644
--- a/build-system/tasks/codecov-upload.js
+++ b/build-system/tasks/codecov-upload.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const colors = require('../common/colors');
diff --git a/build-system/tasks/compile-jison.js b/build-system/tasks/compile-jison.js
index 57ab1bc4c469..0910db53f1f3 100644
--- a/build-system/tasks/compile-jison.js
+++ b/build-system/tasks/compile-jison.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const fs = require('fs-extra');
diff --git a/build-system/tasks/create-golden-css/css/main.css b/build-system/tasks/create-golden-css/css/main.css
index eac098a2b6da..9f8f73f14fb7 100644
--- a/build-system/tasks/create-golden-css/css/main.css
+++ b/build-system/tasks/create-golden-css/css/main.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /**
  * NOTE: This file exists to compare outputs of css file transformation
diff --git a/build-system/tasks/css/index.js b/build-system/tasks/css/index.js
index 57c08eafc518..653485257552 100644
--- a/build-system/tasks/css/index.js
+++ b/build-system/tasks/css/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const debounce = require('../../common/debounce');
 const fs = require('fs-extra');
 const globby = require('globby');
diff --git a/build-system/tasks/css/init-sync.js b/build-system/tasks/css/init-sync.js
index 644945159d8a..5f91ed39c40a 100644
--- a/build-system/tasks/css/init-sync.js
+++ b/build-system/tasks/css/init-sync.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {transformCssString} = require('./jsify-css');
diff --git a/build-system/tasks/css/jsify-css-sync.js b/build-system/tasks/css/jsify-css-sync.js
index 1c9944c6ff0a..bca0cb065c38 100644
--- a/build-system/tasks/css/jsify-css-sync.js
+++ b/build-system/tasks/css/jsify-css-sync.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/tasks/css/jsify-css.js b/build-system/tasks/css/jsify-css.js
index 906a265e9c86..3b1b129042e4 100644
--- a/build-system/tasks/css/jsify-css.js
+++ b/build-system/tasks/css/jsify-css.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const cssnano = require('cssnano');
diff --git a/build-system/tasks/default-task.js b/build-system/tasks/default-task.js
index 2ba63eb2e8f3..d09a802b271c 100644
--- a/build-system/tasks/default-task.js
+++ b/build-system/tasks/default-task.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const argv = require('minimist')(process.argv.slice(2));
 const {createCtrlcHandler} = require('../common/ctrlcHandler');
 const {cyan, green} = require('../common/colors');
diff --git a/build-system/tasks/dep-check.js b/build-system/tasks/dep-check.js
index 6d5cdfbe196b..5b3a0162ec69 100644
--- a/build-system/tasks/dep-check.js
+++ b/build-system/tasks/dep-check.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const depCheckConfig = require('../test-configs/dep-check-config');
diff --git a/build-system/tasks/dist.js b/build-system/tasks/dist.js
index 8340246dcd96..dc6b09e2420a 100644
--- a/build-system/tasks/dist.js
+++ b/build-system/tasks/dist.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const colors = require('../common/colors');
 const fs = require('fs-extra');
 const globby = require('globby');
diff --git a/build-system/tasks/e2e/amp-driver.js b/build-system/tasks/e2e/amp-driver.js
index ade67c97437c..4ddf1dc2954a 100644
--- a/build-system/tasks/e2e/amp-driver.js
+++ b/build-system/tasks/e2e/amp-driver.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @enum {string} */
 const AmpdocEnvironment = {
   SINGLE: 'single',
diff --git a/build-system/tasks/e2e/controller-promise.js b/build-system/tasks/e2e/controller-promise.js
index 0fdf7f865f58..2b695579d42b 100644
--- a/build-system/tasks/e2e/controller-promise.js
+++ b/build-system/tasks/e2e/controller-promise.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Allow expectations to await the expected value. Duck-type a real Promise.
  * This class, and its waitForValue member function, are necessary because
diff --git a/build-system/tasks/e2e/describes-e2e.js b/build-system/tasks/e2e/describes-e2e.js
index 47f9b0bf2469..f67ecd984073 100644
--- a/build-system/tasks/e2e/describes-e2e.js
+++ b/build-system/tasks/e2e/describes-e2e.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // import to install chromedriver and geckodriver
 require('chromedriver');
 require('geckodriver');
diff --git a/build-system/tasks/e2e/driver/query-xpath.js b/build-system/tasks/e2e/driver/query-xpath.js
index b20b7ec29f01..5941796beb37 100644
--- a/build-system/tasks/e2e/driver/query-xpath.js
+++ b/build-system/tasks/e2e/driver/query-xpath.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const TEST_ID_PROPERTY = 'iAmphtmlXpathTestId';
 
 const TEST_ID_ATTRIBUTE = 'data-i-amphtml-xpath-test-id';
diff --git a/build-system/tasks/e2e/e2e-types.js b/build-system/tasks/e2e/e2e-types.js
index 818f6a6ed1ee..1cd2dcd282d9 100644
--- a/build-system/tasks/e2e/e2e-types.js
+++ b/build-system/tasks/e2e/e2e-types.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * A wrapper class that allows client code to own references to
  * framework-specific element handles, but which does not expose any of the
diff --git a/build-system/tasks/e2e/expect.js b/build-system/tasks/e2e/expect.js
index 2673841bb1e3..04df369c3133 100644
--- a/build-system/tasks/e2e/expect.js
+++ b/build-system/tasks/e2e/expect.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const chai = require('chai');
 chai.use(require('chai-as-promised'));
 const {ControllerPromise} = require('./controller-promise');
diff --git a/build-system/tasks/e2e/helper.js b/build-system/tasks/e2e/helper.js
index 3f988bc1a8d3..d34a4dcf1dde 100644
--- a/build-system/tasks/e2e/helper.js
+++ b/build-system/tasks/e2e/helper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 require('babel-regenerator-runtime');
 const describes = require('./describes-e2e');
 const {expect} = require('./expect');
diff --git a/build-system/tasks/e2e/mocha-ci-reporter.js b/build-system/tasks/e2e/mocha-ci-reporter.js
index f0d6464c2ce6..726dc2b3e557 100644
--- a/build-system/tasks/e2e/mocha-ci-reporter.js
+++ b/build-system/tasks/e2e/mocha-ci-reporter.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const JsonReporter = require('./mocha-custom-json-reporter');
 const mocha = require('mocha');
 const MochaDotsReporter = require('./mocha-dots-reporter');
diff --git a/build-system/tasks/e2e/mocha-custom-json-reporter.js b/build-system/tasks/e2e/mocha-custom-json-reporter.js
index bc4bddc54921..a52ff1750cfc 100644
--- a/build-system/tasks/e2e/mocha-custom-json-reporter.js
+++ b/build-system/tasks/e2e/mocha-custom-json-reporter.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const fs = require('fs-extra');
diff --git a/build-system/tasks/e2e/mocha-dots-reporter.js b/build-system/tasks/e2e/mocha-dots-reporter.js
index 981774c3617c..2ad6b7ce7e47 100644
--- a/build-system/tasks/e2e/mocha-dots-reporter.js
+++ b/build-system/tasks/e2e/mocha-dots-reporter.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const Mocha = require('mocha');
diff --git a/build-system/tasks/e2e/network-logger.js b/build-system/tasks/e2e/network-logger.js
index e5d0559e2356..7f044563a88a 100644
--- a/build-system/tasks/e2e/network-logger.js
+++ b/build-system/tasks/e2e/network-logger.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import selenium from 'selenium-webdriver';
 
 const {logging} = selenium;
diff --git a/build-system/tasks/e2e/repl.js b/build-system/tasks/e2e/repl.js
index 9e5be8d84166..7bcded68aeb2 100644
--- a/build-system/tasks/e2e/repl.js
+++ b/build-system/tasks/e2e/repl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const READY_MESSAGE = 'e2e repl ready';
 const CONTINUE_MESSAGE = 'cleaning up repl';
 
diff --git a/build-system/tasks/e2e/selenium-webdriver-controller.js b/build-system/tasks/e2e/selenium-webdriver-controller.js
index 4b0f9740978b..9df90f8f3b82 100644
--- a/build-system/tasks/e2e/selenium-webdriver-controller.js
+++ b/build-system/tasks/e2e/selenium-webdriver-controller.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const fs = require('fs');
 const selenium = require('selenium-webdriver');
 const {
diff --git a/build-system/tasks/extension-helpers.js b/build-system/tasks/extension-helpers.js
index 21ec977acc0e..9fce26224f20 100644
--- a/build-system/tasks/extension-helpers.js
+++ b/build-system/tasks/extension-helpers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const argv = require('minimist')(process.argv.slice(2));
 const babel = require('@babel/core');
 const debounce = require('../common/debounce');
diff --git a/build-system/tasks/firebase.js b/build-system/tasks/firebase.js
index 7afdd5c34775..9b976987880f 100644
--- a/build-system/tasks/firebase.js
+++ b/build-system/tasks/firebase.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const argv = require('minimist')(process.argv.slice(2));
 const fs = require('fs-extra');
 const path = require('path');
diff --git a/build-system/tasks/get-zindex/get-zindex.test.js b/build-system/tasks/get-zindex/get-zindex.test.js
index 45379a2cf151..f958ca27bb43 100644
--- a/build-system/tasks/get-zindex/get-zindex.test.js
+++ b/build-system/tasks/get-zindex/get-zindex.test.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const test = require('ava');
diff --git a/build-system/tasks/get-zindex/index.js b/build-system/tasks/get-zindex/index.js
index 6c63b1c9cdb8..7a8dffad0cbd 100644
--- a/build-system/tasks/get-zindex/index.js
+++ b/build-system/tasks/get-zindex/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const fs = require('fs');
diff --git a/build-system/tasks/get-zindex/jscodeshift/collect-zindex.js b/build-system/tasks/get-zindex/jscodeshift/collect-zindex.js
index 86b1d0a39831..df47fcb0b4f1 100644
--- a/build-system/tasks/get-zindex/jscodeshift/collect-zindex.js
+++ b/build-system/tasks/get-zindex/jscodeshift/collect-zindex.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const zIndexRegExp = /^z-?index$/i;
 
 /**
diff --git a/build-system/tasks/get-zindex/test-0.js b/build-system/tasks/get-zindex/test-0.js
index 917cc10b2221..e15cde1242c6 100644
--- a/build-system/tasks/get-zindex/test-0.js
+++ b/build-system/tasks/get-zindex/test-0.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /* eslint-disable */
 
 const declarator = {
diff --git a/build-system/tasks/get-zindex/test-1.js b/build-system/tasks/get-zindex/test-1.js
index 1c98aea8e10e..23af87c11aeb 100644
--- a/build-system/tasks/get-zindex/test-1.js
+++ b/build-system/tasks/get-zindex/test-1.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /* eslint-disable */
 
 <Component style={{'z-index': 12345}} />;
diff --git a/build-system/tasks/get-zindex/test-2.css b/build-system/tasks/get-zindex/test-2.css
index 646d0ed6fa16..6e8396f72bb6 100644
--- a/build-system/tasks/get-zindex/test-2.css
+++ b/build-system/tasks/get-zindex/test-2.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /**
  * Horizontal scrolling interferes with embedded scenarios and predominantly
diff --git a/build-system/tasks/get-zindex/test.css b/build-system/tasks/get-zindex/test.css
index 99e240bbae17..cfd79c7a84ec 100644
--- a/build-system/tasks/get-zindex/test.css
+++ b/build-system/tasks/get-zindex/test.css
@@ -1,19 +1,5 @@
 
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /**
  * Horizontal scrolling interferes with embedded scenarios and predominantly
diff --git a/build-system/tasks/helpers.js b/build-system/tasks/helpers.js
index c810c5d36765..21995baebd28 100644
--- a/build-system/tasks/helpers.js
+++ b/build-system/tasks/helpers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const argv = require('minimist')(process.argv.slice(2));
 const debounce = require('../common/debounce');
 const esbuild = require('esbuild');
diff --git a/build-system/tasks/integration.js b/build-system/tasks/integration.js
index f5c0d5891dcf..cc95c407e8ec 100644
--- a/build-system/tasks/integration.js
+++ b/build-system/tasks/integration.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'using strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/tasks/js-license.txt b/build-system/tasks/js-license.txt
index afe69188c987..8b137891791f 100644
--- a/build-system/tasks/js-license.txt
+++ b/build-system/tasks/js-license.txt
@@ -1,15 +1 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
diff --git a/build-system/tasks/lint.js b/build-system/tasks/lint.js
index 4eb81f51c648..0405d13efdf9 100644
--- a/build-system/tasks/lint.js
+++ b/build-system/tasks/lint.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/tasks/make-extension/format.js b/build-system/tasks/make-extension/format.js
index 28f40679018a..e001b5b5329b 100644
--- a/build-system/tasks/make-extension/format.js
+++ b/build-system/tasks/make-extension/format.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const {getOutput} = require('../../common/process');
 
 /**
diff --git a/build-system/tasks/make-extension/index.js b/build-system/tasks/make-extension/index.js
index 4a2084ca483a..2308ad4b633d 100644
--- a/build-system/tasks/make-extension/index.js
+++ b/build-system/tasks/make-extension/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const del = require('del');
diff --git a/build-system/tasks/make-extension/test/test.js b/build-system/tasks/make-extension/test/test.js
index eca23be3fb77..06b670021ccf 100644
--- a/build-system/tasks/make-extension/test/test.js
+++ b/build-system/tasks/make-extension/test/test.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const ava = require('ava');
 const path = require('path');
 const tempy = require('tempy');
diff --git a/build-system/tasks/markdown-toc/index.js b/build-system/tasks/markdown-toc/index.js
index d9529acf5771..07521e3c9593 100644
--- a/build-system/tasks/markdown-toc/index.js
+++ b/build-system/tasks/markdown-toc/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const globby = require('globby');
 const path = require('path');
 const prettier = require('prettier');
diff --git a/build-system/tasks/markdown-toc/test/test.js b/build-system/tasks/markdown-toc/test/test.js
index f947a65cba5f..3251175fdea3 100644
--- a/build-system/tasks/markdown-toc/test/test.js
+++ b/build-system/tasks/markdown-toc/test/test.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const globby = require('globby');
 const path = require('path');
 const test = require('ava');
diff --git a/build-system/tasks/performance-urls.js b/build-system/tasks/performance-urls.js
index c33499bf0816..759cbd106d2b 100644
--- a/build-system/tasks/performance-urls.js
+++ b/build-system/tasks/performance-urls.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const fs = require('fs');
 const path = require('path');
 const {cyan, green, red} = require('../common/colors');
diff --git a/build-system/tasks/performance/ads-handler.js b/build-system/tasks/performance/ads-handler.js
index c644836bfd73..85b6ddd0d914 100644
--- a/build-system/tasks/performance/ads-handler.js
+++ b/build-system/tasks/performance/ads-handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const fs = require('fs');
 const {urlToCachePath} = require('./helpers');
 
diff --git a/build-system/tasks/performance/analytics-handler.js b/build-system/tasks/performance/analytics-handler.js
index f885bbd7bfe7..479b31ac7aa1 100644
--- a/build-system/tasks/performance/analytics-handler.js
+++ b/build-system/tasks/performance/analytics-handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const puppeteer = require('puppeteer'); // eslint-disable-line no-unused-vars
 
 /**
diff --git a/build-system/tasks/performance/cache-documents.js b/build-system/tasks/performance/cache-documents.js
index cca0a70358a7..fbda35a049c4 100644
--- a/build-system/tasks/performance/cache-documents.js
+++ b/build-system/tasks/performance/cache-documents.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const {CONTROL, EXPERIMENT, downloadToDisk} = require('./helpers');
 const {startServer, stopServer} = require('../serve');
 const HOST = 'localhost';
diff --git a/build-system/tasks/performance/compile-scripts.js b/build-system/tasks/performance/compile-scripts.js
index a1a55dd21b7f..716e2fa5730b 100644
--- a/build-system/tasks/performance/compile-scripts.js
+++ b/build-system/tasks/performance/compile-scripts.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const argv = require('minimist')(process.argv.slice(2));
 const {buildRuntime} = require('../../common/utils');
 const {EXPERIMENT, urlToCachePath} = require('./helpers');
diff --git a/build-system/tasks/performance/copy-images.js b/build-system/tasks/performance/copy-images.js
index 0aa2f766c9d6..aaeb75059f74 100644
--- a/build-system/tasks/performance/copy-images.js
+++ b/build-system/tasks/performance/copy-images.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const fs = require('fs');
 const {CONTROL, maybeCopyImageToCache, urlToCachePath} = require('./helpers');
 const {JSDOM} = require('jsdom');
diff --git a/build-system/tasks/performance/helpers.js b/build-system/tasks/performance/helpers.js
index d128d243dc64..fe8971989f79 100644
--- a/build-system/tasks/performance/helpers.js
+++ b/build-system/tasks/performance/helpers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const fetch = require('node-fetch');
 const fs = require('fs');
 const path = require('path');
diff --git a/build-system/tasks/performance/index.js b/build-system/tasks/performance/index.js
index 74b036be58ab..c0af2d1d4b9f 100644
--- a/build-system/tasks/performance/index.js
+++ b/build-system/tasks/performance/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const cacheDocuments = require('./cache-documents');
 const compileScripts = require('./compile-scripts');
 const copyLocalImages = require('./copy-images');
diff --git a/build-system/tasks/performance/load-config.js b/build-system/tasks/performance/load-config.js
index 0cc6b3f3cfdd..d1ddd26748b9 100644
--- a/build-system/tasks/performance/load-config.js
+++ b/build-system/tasks/performance/load-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const argv = require('minimist')(process.argv.slice(2));
 const fs = require('fs');
 const path = require('path');
diff --git a/build-system/tasks/performance/measure-documents.js b/build-system/tasks/performance/measure-documents.js
index 12dcfb883c51..dcf21b07251d 100644
--- a/build-system/tasks/performance/measure-documents.js
+++ b/build-system/tasks/performance/measure-documents.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const argv = require('minimist')(process.argv.slice(2));
 const fs = require('fs-extra');
 const puppeteer = require('puppeteer');
diff --git a/build-system/tasks/performance/print-report.js b/build-system/tasks/performance/print-report.js
index 3454668c463d..01fd100d152b 100644
--- a/build-system/tasks/performance/print-report.js
+++ b/build-system/tasks/performance/print-report.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const fs = require('fs');
 const {CONTROL, EXPERIMENT, RESULTS_PATH} = require('./helpers');
 const {cyan} = require('../../common/colors');
diff --git a/build-system/tasks/performance/rewrite-analytics-tags.js b/build-system/tasks/performance/rewrite-analytics-tags.js
index 5224ad35888d..85b922906246 100644
--- a/build-system/tasks/performance/rewrite-analytics-tags.js
+++ b/build-system/tasks/performance/rewrite-analytics-tags.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const fs = require('fs');
 const {
   CONTROL,
diff --git a/build-system/tasks/performance/rewrite-script-tags.js b/build-system/tasks/performance/rewrite-script-tags.js
index 55f26b4b7808..412c7c864fb0 100644
--- a/build-system/tasks/performance/rewrite-script-tags.js
+++ b/build-system/tasks/performance/rewrite-script-tags.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const fs = require('fs');
 const {
   CDN_URL,
diff --git a/build-system/tasks/performance/run-tests.js b/build-system/tasks/performance/run-tests.js
index d80c1281ef69..96d0a98929d3 100644
--- a/build-system/tasks/performance/run-tests.js
+++ b/build-system/tasks/performance/run-tests.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const Mocha = require('mocha');
 const path = require('path');
 const TEST_SUITE_PATH = 'build-system/tasks/performance/test-suite.js';
diff --git a/build-system/tasks/performance/stats.js b/build-system/tasks/performance/stats.js
index f18f816354c7..542f6a0ff741 100644
--- a/build-system/tasks/performance/stats.js
+++ b/build-system/tasks/performance/stats.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Get the average of an array
  *
diff --git a/build-system/tasks/performance/test-suite.js b/build-system/tasks/performance/test-suite.js
index 2e6a22719e9c..4d884ae4cb82 100644
--- a/build-system/tasks/performance/test-suite.js
+++ b/build-system/tasks/performance/test-suite.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const argv = require('minimist')(process.argv.slice(2));
 const loadConfig = require('./load-config');
 const {expect} = require('chai');
diff --git a/build-system/tasks/pr-check.js b/build-system/tasks/pr-check.js
index aaf7fd14c553..da8042d96f63 100644
--- a/build-system/tasks/pr-check.js
+++ b/build-system/tasks/pr-check.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/tasks/pr-deploy-bot-utils.js b/build-system/tasks/pr-deploy-bot-utils.js
index 5bac24cedf3d..d07d95630b0f 100644
--- a/build-system/tasks/pr-deploy-bot-utils.js
+++ b/build-system/tasks/pr-deploy-bot-utils.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const fetch = require('node-fetch');
diff --git a/build-system/tasks/prepend-global/index.js b/build-system/tasks/prepend-global/index.js
index d86820d4e8e2..b7ed161adbf8 100644
--- a/build-system/tasks/prepend-global/index.js
+++ b/build-system/tasks/prepend-global/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/tasks/prepend-global/prepend-global.test.js b/build-system/tasks/prepend-global/prepend-global.test.js
index bcdb60acf37a..34042fcb79da 100644
--- a/build-system/tasks/prepend-global/prepend-global.test.js
+++ b/build-system/tasks/prepend-global/prepend-global.test.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const m = require('.');
diff --git a/build-system/tasks/presubmit.js b/build-system/tasks/presubmit.js
index 918bf75da04c..08eedc7446fd 100644
--- a/build-system/tasks/presubmit.js
+++ b/build-system/tasks/presubmit.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const fs = require('fs');
diff --git a/build-system/tasks/prettify.js b/build-system/tasks/prettify.js
index d1294a403973..11aee92ee81d 100644
--- a/build-system/tasks/prettify.js
+++ b/build-system/tasks/prettify.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview This file implements the `amp prettify` task, which uses
  * prettier to check (and optionally fix) the formatting in a variety of
diff --git a/build-system/tasks/release/index.js b/build-system/tasks/release/index.js
index 1c9ff001b43c..082d790a5c31 100644
--- a/build-system/tasks/release/index.js
+++ b/build-system/tasks/release/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/tasks/runtime-test/custom-launchers.js b/build-system/tasks/runtime-test/custom-launchers.js
index 0a9a35df47f2..eb7bbacf5d55 100644
--- a/build-system/tasks/runtime-test/custom-launchers.js
+++ b/build-system/tasks/runtime-test/custom-launchers.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/build-system/tasks/runtime-test/helpers-unit.js b/build-system/tasks/runtime-test/helpers-unit.js
index 4b1b6223d8c0..29046c83e1fc 100644
--- a/build-system/tasks/runtime-test/helpers-unit.js
+++ b/build-system/tasks/runtime-test/helpers-unit.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const fs = require('fs');
diff --git a/build-system/tasks/runtime-test/helpers.js b/build-system/tasks/runtime-test/helpers.js
index 05f2abf1c367..5c343ca2ddd1 100644
--- a/build-system/tasks/runtime-test/helpers.js
+++ b/build-system/tasks/runtime-test/helpers.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/tasks/runtime-test/runtime-test-base.js b/build-system/tasks/runtime-test/runtime-test-base.js
index f055e0f03534..9f4eaafc10bc 100644
--- a/build-system/tasks/runtime-test/runtime-test-base.js
+++ b/build-system/tasks/runtime-test/runtime-test-base.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/tasks/serve.js b/build-system/tasks/serve.js
index 22b2da301dff..411618b08705 100644
--- a/build-system/tasks/serve.js
+++ b/build-system/tasks/serve.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const connect = require('gulp-connect');
diff --git a/build-system/tasks/server-tests.js b/build-system/tasks/server-tests.js
index b83155cd9adb..f2b6d4b403e2 100644
--- a/build-system/tasks/server-tests.js
+++ b/build-system/tasks/server-tests.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const assert = require('assert');
 const fs = require('fs');
 const globby = require('globby');
diff --git a/build-system/tasks/storybook/amp-env/main.js b/build-system/tasks/storybook/amp-env/main.js
index 14a0b77bce50..fff16f56daeb 100644
--- a/build-system/tasks/storybook/amp-env/main.js
+++ b/build-system/tasks/storybook/amp-env/main.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const {webpackConfigNoChunkTilde} = require('../env-utils');
 
 module.exports = {
diff --git a/build-system/tasks/storybook/amp-env/register.js b/build-system/tasks/storybook/amp-env/register.js
index e8dc2c88646e..4910119f7d60 100644
--- a/build-system/tasks/storybook/amp-env/register.js
+++ b/build-system/tasks/storybook/amp-env/register.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {addons} from '@storybook/addons';
 
 /**
diff --git a/build-system/tasks/storybook/amp-env/webpack.config.js b/build-system/tasks/storybook/amp-env/webpack.config.js
index 83c25dd1ee3d..01b8afda9ce9 100644
--- a/build-system/tasks/storybook/amp-env/webpack.config.js
+++ b/build-system/tasks/storybook/amp-env/webpack.config.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const path = require('path');
 const {getRelativeAliasMap} = require('../../../babel-config/import-resolver');
 const {webpackConfigNoChunkTilde} = require('../env-utils');
diff --git a/build-system/tasks/storybook/env-utils.js b/build-system/tasks/storybook/env-utils.js
index b9bdeaaf4661..e80c11f46591 100644
--- a/build-system/tasks/storybook/env-utils.js
+++ b/build-system/tasks/storybook/env-utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Change a Webpack config object so that filenames resulting from chunk
  * splitting do not include a tilde (~) character.
diff --git a/build-system/tasks/storybook/index.js b/build-system/tasks/storybook/index.js
index eec867b788bc..4463179b0d13 100644
--- a/build-system/tasks/storybook/index.js
+++ b/build-system/tasks/storybook/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/tasks/storybook/preact-env/main.js b/build-system/tasks/storybook/preact-env/main.js
index 15aaa9dbfc3f..09d7acbc9c8d 100644
--- a/build-system/tasks/storybook/preact-env/main.js
+++ b/build-system/tasks/storybook/preact-env/main.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const {webpackConfigNoChunkTilde} = require('../env-utils');
 
 module.exports = {
diff --git a/build-system/tasks/storybook/preact-env/webpack.config.js b/build-system/tasks/storybook/preact-env/webpack.config.js
index a96ae2e36e16..9119ae6b6f1b 100644
--- a/build-system/tasks/storybook/preact-env/webpack.config.js
+++ b/build-system/tasks/storybook/preact-env/webpack.config.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const path = require('path');
 const {BUILD_CONSTANTS} = require('../../../compile/build-constants');
 const {DefinePlugin} = require('webpack');
diff --git a/build-system/tasks/sweep-experiments/index.js b/build-system/tasks/sweep-experiments/index.js
index 8915c04bd148..c188524e6c95 100644
--- a/build-system/tasks/sweep-experiments/index.js
+++ b/build-system/tasks/sweep-experiments/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const argv = require('minimist')(process.argv.slice(2));
 const globby = require('globby');
 const path = require('path');
diff --git a/build-system/tasks/test-report-upload.js b/build-system/tasks/test-report-upload.js
index 3d01397bde9b..7c65852e59b5 100644
--- a/build-system/tasks/test-report-upload.js
+++ b/build-system/tasks/test-report-upload.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview This file implements the `amp test-report-upload` task, which POSTs test result reports
  * to an API endpoint that stores them in the database.
diff --git a/build-system/tasks/unit.js b/build-system/tasks/unit.js
index f5bb12fccad4..61daa8c34dcd 100644
--- a/build-system/tasks/unit.js
+++ b/build-system/tasks/unit.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'using strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/tasks/validate-html-fixtures.js b/build-system/tasks/validate-html-fixtures.js
index 288c23de67cb..7b373c5228c8 100644
--- a/build-system/tasks/validate-html-fixtures.js
+++ b/build-system/tasks/validate-html-fixtures.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'using strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/tasks/validator.js b/build-system/tasks/validator.js
index 20a2e3bdd848..63e95700d4e1 100644
--- a/build-system/tasks/validator.js
+++ b/build-system/tasks/validator.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/tasks/visual-diff/helpers.js b/build-system/tasks/visual-diff/helpers.js
index 128aed9a2cd2..89b81d22e1f1 100644
--- a/build-system/tasks/visual-diff/helpers.js
+++ b/build-system/tasks/visual-diff/helpers.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/tasks/visual-diff/index.js b/build-system/tasks/visual-diff/index.js
index 3bc26e04aaac..baa2101fe977 100644
--- a/build-system/tasks/visual-diff/index.js
+++ b/build-system/tasks/visual-diff/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const argv = require('minimist')(process.argv.slice(2));
diff --git a/build-system/tasks/visual-diff/snippets/freeze-canvas-image.js b/build-system/tasks/visual-diff/snippets/freeze-canvas-image.js
index 8a58a4d1d6fa..d458e320d1a8 100644
--- a/build-system/tasks/visual-diff/snippets/freeze-canvas-image.js
+++ b/build-system/tasks/visual-diff/snippets/freeze-canvas-image.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview This file is executed via Puppeteer's page.evaluate on a
  * document to copy the current image data of the canvas to an attribute so that
diff --git a/build-system/tasks/visual-diff/snippets/freeze-form-values.js b/build-system/tasks/visual-diff/snippets/freeze-form-values.js
index d57013bc6db8..18a9155538c0 100644
--- a/build-system/tasks/visual-diff/snippets/freeze-form-values.js
+++ b/build-system/tasks/visual-diff/snippets/freeze-form-values.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview This file is executed via Puppeteer's page.evaluate on a
  * document to copy the values of forms into their attributes, so that they will
diff --git a/build-system/tasks/visual-diff/snippets/iframe-wrapper.js b/build-system/tasks/visual-diff/snippets/iframe-wrapper.js
index 099c37a80ab5..42dcef5337a4 100644
--- a/build-system/tasks/visual-diff/snippets/iframe-wrapper.js
+++ b/build-system/tasks/visual-diff/snippets/iframe-wrapper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview This file is executed via Puppeteer's page.evaluate on a
  * document to wrap it with an <iframe>, so that we can perform
diff --git a/build-system/tasks/visual-diff/snippets/remove-amp-scripts.js b/build-system/tasks/visual-diff/snippets/remove-amp-scripts.js
index fb8f68b339c1..91585212cb31 100644
--- a/build-system/tasks/visual-diff/snippets/remove-amp-scripts.js
+++ b/build-system/tasks/visual-diff/snippets/remove-amp-scripts.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview This file is executed via Puppeteer's page.evaluate on a
  * document to remove all <script> tags that import AMP pages. This makes for
diff --git a/build-system/test-configs/.eslintrc.js b/build-system/test-configs/.eslintrc.js
index 8e8cb89f35b4..fe806b111bb0 100644
--- a/build-system/test-configs/.eslintrc.js
+++ b/build-system/test-configs/.eslintrc.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 module.exports = {
   'overrides': [
     {
diff --git a/build-system/test-configs/config.js b/build-system/test-configs/config.js
index e31a2489a8d8..9b9336ef3441 100644
--- a/build-system/test-configs/config.js
+++ b/build-system/test-configs/config.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
@@ -128,8 +113,13 @@ const lintGlobs = [
 ];
 
 /**
+<<<<<<< HEAD
+ * This should not include .js files, since those are handled by eslint:
+ *  - forbidden terms: local/no-forbidden-terms
+=======
  * This should not include .js files, since those are handled by eslint via the
  * local/no-forbidden-terms rule.
+>>>>>>> d75c2ba8915655fcdec5cd3b72dcecf81d4c250f
  */
 const presubmitGlobs = [
   '**/*.{css,go,md}',
diff --git a/build-system/test-configs/dep-check-config.js b/build-system/test-configs/dep-check-config.js
index a92cc17dc248..e653f40e48e9 100644
--- a/build-system/test-configs/dep-check-config.js
+++ b/build-system/test-configs/dep-check-config.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /*eslint "max-len": 0*/
diff --git a/build-system/test-configs/forbidden-terms.js b/build-system/test-configs/forbidden-terms.js
index 98313fd26fd7..441c869d49e2 100644
--- a/build-system/test-configs/forbidden-terms.js
+++ b/build-system/test-configs/forbidden-terms.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const requiresReviewPrivacy =
   'Usage of this API requires dedicated review due to ' +
   'being privacy sensitive. Please file an issue asking for permission' +
diff --git a/build-system/test-configs/jscodeshift/index.js b/build-system/test-configs/jscodeshift/index.js
index b92c7251fa1d..61c50647c4fd 100644
--- a/build-system/test-configs/jscodeshift/index.js
+++ b/build-system/test-configs/jscodeshift/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const {execScriptAsync} = require('../../common/exec');
 const {getOutput} = require('../../common/process');
 
diff --git a/build-system/test-configs/karma.conf.js b/build-system/test-configs/karma.conf.js
index c37ef1befaeb..e20e9aade83f 100644
--- a/build-system/test-configs/karma.conf.js
+++ b/build-system/test-configs/karma.conf.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {dotWrappingWidth} = require('../common/logging');
diff --git a/css/amp-ima-video-iframe.css b/css/amp-ima-video-iframe.css
index 4b08175d4585..b3dbcd4db1ce 100644
--- a/css/amp-ima-video-iframe.css
+++ b/css/amp-ima-video-iframe.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * Styles inserted in iframes rendered by <amp-ima-video>.
diff --git a/css/amp-story-entry-point.css b/css/amp-story-entry-point.css
index 83bbf40c5dc6..afb174791e4a 100644
--- a/css/amp-story-entry-point.css
+++ b/css/amp-story-entry-point.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-story-entry-point {
   position: relative;
diff --git a/css/amp-story-player-shadow.css b/css/amp-story-player-shadow.css
index 21dee099b96f..343153b2b9db 100644
--- a/css/amp-story-player-shadow.css
+++ b/css/amp-story-player-shadow.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
  /** See #23876 and #31363. */
  :host {
diff --git a/css/amp-story-player.css b/css/amp-story-player.css
index 32135093989c..f8de637b2798 100644
--- a/css/amp-story-player.css
+++ b/css/amp-story-player.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-story-player {
   position: relative;
diff --git a/css/ampdoc.css b/css/ampdoc.css
index 9b4dbe7b195a..4c898ac95c71 100644
--- a/css/ampdoc.css
+++ b/css/ampdoc.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /**
  * @fileoverview CSS specifically for non-AMP4ADS formats.
diff --git a/css/ampshared.css b/css/ampshared.css
index 5b6c2e28861d..181819ef9368 100644
--- a/css/ampshared.css
+++ b/css/ampshared.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /**
  * @fileoverview CSS shared across AMP4ADS and other formats.
diff --git a/css/video-autoplay.css b/css/video-autoplay.css
index ed28fb8c9450..965a436f012c 100644
--- a/css/video-autoplay.css
+++ b/css/video-autoplay.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 .i-amphtml-video-mask {
   display: block;
   z-index: 1;
diff --git a/docs/developing.md b/docs/developing.md
index ea2365d2df7a..126c72c168e0 100644
--- a/docs/developing.md
+++ b/docs/developing.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Developing in AMP
 
 ## How to get started
diff --git a/docs/getting-started-e2e.md b/docs/getting-started-e2e.md
index dfce89657a58..a9e6a7fe9f81 100644
--- a/docs/getting-started-e2e.md
+++ b/docs/getting-started-e2e.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Getting Started End-to-end
 
 This end-to-end guide will show you how to contribute code to the AMP open source project. It covers everything from creating a GitHub account to getting your code reviewed and merged.
diff --git a/docs/getting-started-quick.md b/docs/getting-started-quick.md
index 05d8b9cd5652..f4954950b55d 100644
--- a/docs/getting-started-quick.md
+++ b/docs/getting-started-quick.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Getting Started: Quick Start
 
 ## About this guide
diff --git a/docs/issue-priorities.md b/docs/issue-priorities.md
index fe16b88378ce..ec818486db9f 100644
--- a/docs/issue-priorities.md
+++ b/docs/issue-priorities.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 ## AMP GitHub Issue Priorities
 
 The AMP team is using the below priorities and guidelines to make it easier to order issues by the level of attention they need.
diff --git a/docs/running-server-side-experiment.md b/docs/running-server-side-experiment.md
index 1b846c38add5..77047909c80d 100644
--- a/docs/running-server-side-experiment.md
+++ b/docs/running-server-side-experiment.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Running Experiment with Different Binaries
 
 We understand that experimenting a new feature or change on the client side is not always practical. For example, if you rewrite a big chunk of the code base, or include a new transformer in the transpiling process, you would want to run the experiment at the server level, where different binaries will be returned.
diff --git a/docs/spec/amp-actions-and-events.md b/docs/spec/amp-actions-and-events.md
index 5fe00120ade8..c75d2d56c4ce 100644
--- a/docs/spec/amp-actions-and-events.md
+++ b/docs/spec/amp-actions-and-events.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Actions and events in AMP
 
 [TOC]
diff --git a/docs/spec/amp-boilerplate.md b/docs/spec/amp-boilerplate.md
index ceb64f582645..70e70e3121cf 100644
--- a/docs/spec/amp-boilerplate.md
+++ b/docs/spec/amp-boilerplate.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP Boilerplate Code
 
 ## `head > style[amp-boilerplate]` and `noscript > style[amp-boilerplate]`
diff --git a/docs/spec/amp-cors-requests.md b/docs/spec/amp-cors-requests.md
index e0d0a9f0164c..9cefb14442e4 100644
--- a/docs/spec/amp-cors-requests.md
+++ b/docs/spec/amp-cors-requests.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # CORS Requests in AMP
 
 Many AMP components and extensions take advantage of remote endpoints by using
diff --git a/docs/spec/amp-css-classes.md b/docs/spec/amp-css-classes.md
index d9844198295c..ff75c01bcb64 100644
--- a/docs/spec/amp-css-classes.md
+++ b/docs/spec/amp-css-classes.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP CSS classes
 
 This document describes AMP CSS classes prefixed with `amp-`. These classes allow for customizations of some features of AMP runtime and extensions.
diff --git a/docs/spec/amp-email-actions-and-events.md b/docs/spec/amp-email-actions-and-events.md
index 30aa246f26a4..4ee4b1c32393 100644
--- a/docs/spec/amp-email-actions-and-events.md
+++ b/docs/spec/amp-email-actions-and-events.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Actions and events in AMP email
 
 [TOC]
diff --git a/docs/spec/amp-errors.md b/docs/spec/amp-errors.md
index 3d055ede372d..44933badc708 100644
--- a/docs/spec/amp-errors.md
+++ b/docs/spec/amp-errors.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Error reporting in AMP
 
 AMP reports 90% of errors to the endpoint specified by the `errorReportingUrl`
diff --git a/docs/spec/amp-html-components.md b/docs/spec/amp-html-components.md
index 79356b0bd33a..0ed75160704e 100644
--- a/docs/spec/amp-html-components.md
+++ b/docs/spec/amp-html-components.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP HTML Components
 
 ## Overview
diff --git a/docs/spec/amp-html-format.md b/docs/spec/amp-html-format.md
index e1254b292706..67ebb452d3be 100644
--- a/docs/spec/amp-html-format.md
+++ b/docs/spec/amp-html-format.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP HTML ⚡
 
 [TOC]
diff --git a/docs/spec/amp-html-layout.md b/docs/spec/amp-html-layout.md
index 72798c33c97b..83cc221ef7c6 100644
--- a/docs/spec/amp-html-layout.md
+++ b/docs/spec/amp-html-layout.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP HTML Layout System
 
 [TOC]
diff --git a/docs/spec/amp-html-responsive-attributes.md b/docs/spec/amp-html-responsive-attributes.md
index 9ef9bfee666d..fcf4684f022c 100644
--- a/docs/spec/amp-html-responsive-attributes.md
+++ b/docs/spec/amp-html-responsive-attributes.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP HTML Responsive Attributes
 
 You can apply or remove certain attributes based on screen size. These are responsive attributes, or media attributes. On eligible components, these attributes are applied or removed based on media queries. You can also use a value without any media queries. Media queries evaluate from from left to right, applying the first matching media query. You must include a default value with no media query.
diff --git a/docs/spec/amp-html-templates.md b/docs/spec/amp-html-templates.md
index 56628c7e4d72..91716f2de6f7 100644
--- a/docs/spec/amp-html-templates.md
+++ b/docs/spec/amp-html-templates.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP HTML Templates
 
 ## Overview
diff --git a/docs/spec/amp-localstorage.md b/docs/spec/amp-localstorage.md
index 278ea61c24b5..82f233cc8653 100644
--- a/docs/spec/amp-localstorage.md
+++ b/docs/spec/amp-localstorage.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # LocalStorage Usage in AMP
 
 AMP relies on the AMP Viewer's support to use localStorage when the AMP page is embedded in a Viewer. This is because localStorage set within a cross domain iframe is not persisted in some browsers.
diff --git a/docs/spec/amp-managing-user-state.md b/docs/spec/amp-managing-user-state.md
index a85900b311a9..bf8b5189e087 100644
--- a/docs/spec/amp-managing-user-state.md
+++ b/docs/spec/amp-managing-user-state.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Managing non-authenticated user state with AMP
 
 **Table of contents**
diff --git a/docs/spec/amp-shadow-doc.md b/docs/spec/amp-shadow-doc.md
index 02ab0928cbd6..ce5a280e2dfb 100644
--- a/docs/spec/amp-shadow-doc.md
+++ b/docs/spec/amp-shadow-doc.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP Shadow Doc API
 
 ## Overview
diff --git a/docs/spec/amp-tag-addendum.md b/docs/spec/amp-tag-addendum.md
index 03e03aad0103..718b7b8670c3 100644
--- a/docs/spec/amp-tag-addendum.md
+++ b/docs/spec/amp-tag-addendum.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP HTML Tag Addendum
 
 ## Overview
diff --git a/docs/spec/amp-var-substitutions.md b/docs/spec/amp-var-substitutions.md
index f0343aae5782..aa209fa584cb 100644
--- a/docs/spec/amp-var-substitutions.md
+++ b/docs/spec/amp-var-substitutions.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP HTML URL Variable Substitutions
 
 ## Overview
diff --git a/docs/spec/email/amp-email-components.md b/docs/spec/email/amp-email-components.md
index 734f69c62a13..559a7bf46e4e 100644
--- a/docs/spec/email/amp-email-components.md
+++ b/docs/spec/email/amp-email-components.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP for Email Supported Components
 
 The following is the list of [AMP components](https://amp.dev/documentation/components/?format=email) that are currently supported in AMP email messages. The components are grouped into the following categories:
diff --git a/docs/spec/email/amp-email-css.md b/docs/spec/email/amp-email-css.md
index 456663492c66..2433514c8e53 100644
--- a/docs/spec/email/amp-email-css.md
+++ b/docs/spec/email/amp-email-css.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Supported CSS in AMP for Email
 
 This document outlines the CSS features currently supported inside AMP emails.
diff --git a/docs/spec/email/amp-email-format.md b/docs/spec/email/amp-email-format.md
index bf55efbaef94..075be4d0f786 100644
--- a/docs/spec/email/amp-email-format.md
+++ b/docs/spec/email/amp-email-format.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 AMP is a technology known for developing super fast web pages on mobile clients. AMP is a set of HTML tags backed by JavaScript that easily enables functionality with an added focus on performance and security. There are [AMP components](https://amp.dev/documentation/components/) for everything from carousels, to responsive form elements, to retrieving fresh content from remote endpoints.
 
 The AMP for Email format provides [a subset of AMP components](amp-email-components.md) that you can use in email messages. Recipients of AMP emails can view and interact with the AMP components directly in the email.
diff --git a/docs/spec/email/amp-email-html.md b/docs/spec/email/amp-email-html.md
index 0f2705a18043..6075817f7366 100644
--- a/docs/spec/email/amp-email-html.md
+++ b/docs/spec/email/amp-email-html.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Supported HTML in AMP for Email
 
 Note: This list is non-normative and is for reference purposes only. The AMP Validator rules are authoritative
diff --git a/docs/spec/email/amp-email-structure.md b/docs/spec/email/amp-email-structure.md
index 5b0d5fc8e6af..a6b71b510e29 100644
--- a/docs/spec/email/amp-email-structure.md
+++ b/docs/spec/email/amp-email-structure.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Structure and rendering of AMP emails
 
 Email is structured as a [MIME tree](https://en.wikipedia.org/wiki/MIME). This MIME tree contains the message body and any attachments to the email.
diff --git a/docs/testing.md b/docs/testing.md
index e61301a44136..19e0e1a8ba2d 100644
--- a/docs/testing.md
+++ b/docs/testing.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Testing in AMP HTML
 
 This document provides details for testing and building your AMP code.
diff --git a/examples/.eslintrc.js b/examples/.eslintrc.js
index 692ea22573e4..cc72fc4955f5 100644
--- a/examples/.eslintrc.js
+++ b/examples/.eslintrc.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 module.exports = {
   'rules': {
     'jsdoc/check-param-names': 0,
diff --git a/examples/ac-creative.js b/examples/ac-creative.js
index 76e4cd1d3f11..e0241f414054 100644
--- a/examples/ac-creative.js
+++ b/examples/ac-creative.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 if (!window.context) {
   // window.context doesn't exist yet, must perform steps to create it
   // before using it
diff --git a/examples/amp-ad/sticky.js b/examples/amp-ad/sticky.js
index 6de449412930..f4b4e62fe854 100644
--- a/examples/amp-ad/sticky.js
+++ b/examples/amp-ad/sticky.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 window.onload = function () {
   var iframe = document.querySelector('#creative');
 
diff --git a/examples/amp-script/amp-script-demo.js b/examples/amp-script/amp-script-demo.js
index 5aec19c168ee..ab149956868a 100644
--- a/examples/amp-script/amp-script-demo.js
+++ b/examples/amp-script/amp-script-demo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /*
  * @fileoverview
  * Initial DOM must contain a button#hello. Other elemenst are optional.
diff --git a/examples/amp-script/canvas.js b/examples/amp-script/canvas.js
index 59c7e019181e..a6d5a5735d85 100644
--- a/examples/amp-script/canvas.js
+++ b/examples/amp-script/canvas.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const canvas = document.getElementById('canvas');
 const ctx = canvas.getContext('2d');
 
diff --git a/examples/amp-script/empty.js b/examples/amp-script/empty.js
index 359183ee2119..21699dfa3695 100644
--- a/examples/amp-script/empty.js
+++ b/examples/amp-script/empty.js
@@ -1,17 +1 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Nothing yet.
diff --git a/examples/amp-script/export-functions.js b/examples/amp-script/export-functions.js
index b6306ae8962b..39bb3915a4f2 100644
--- a/examples/amp-script/export-functions.js
+++ b/examples/amp-script/export-functions.js
@@ -1,17 +1 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 exportFunction('getData', () => ({data: true}));
diff --git a/examples/amphtml-ads/ads-tag-integration.js b/examples/amphtml-ads/ads-tag-integration.js
index c9b1be7dd3dd..ef765e980845 100644
--- a/examples/amphtml-ads/ads-tag-integration.js
+++ b/examples/amphtml-ads/ads-tag-integration.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview This is a sample bootstrap script for AMP in-a-box host.
  */
diff --git a/examples/example-sw.js b/examples/example-sw.js
index 2ced5ffbfcfa..b2dec49375e4 100644
--- a/examples/example-sw.js
+++ b/examples/example-sw.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 self.addEventListener('fetch', (e) => {
   return fetch(e.request);
 });
diff --git a/examples/mraid/mraid.js b/examples/mraid/mraid.js
index 4a6caf5f84af..d34ea28675d1 100644
--- a/examples/mraid/mraid.js
+++ b/examples/mraid/mraid.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 // Fake mraid.js that lets us pretend to be in a mobile app environment.
 window.mraid = {};
 console.log('initiate marid object');
diff --git a/examples/pwa/pwa-sw.js b/examples/pwa/pwa-sw.js
index 35c1ffa290d5..f76f1aaac016 100644
--- a/examples/pwa/pwa-sw.js
+++ b/examples/pwa/pwa-sw.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 'use strict';
 
 self.addEventListener('install', (event) => {});
diff --git a/examples/pwa/pwa.js b/examples/pwa/pwa.js
index e629a776387c..228b22be36de 100644
--- a/examples/pwa/pwa.js
+++ b/examples/pwa/pwa.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 'use strict';
 
 function log(args) {
diff --git a/examples/visual-tests/amp-accordion/amp-accordion.js b/examples/visual-tests/amp-accordion/amp-accordion.js
index a00900fb3c8d..71ff98f67f0f 100644
--- a/examples/visual-tests/amp-accordion/amp-accordion.js
+++ b/examples/visual-tests/amp-accordion/amp-accordion.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {
diff --git a/examples/visual-tests/amp-autocomplete/amp-autocomplete.js b/examples/visual-tests/amp-autocomplete/amp-autocomplete.js
index 8092157ad7b6..9cf52427c8ea 100644
--- a/examples/visual-tests/amp-autocomplete/amp-autocomplete.js
+++ b/examples/visual-tests/amp-autocomplete/amp-autocomplete.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {
diff --git a/examples/visual-tests/amp-date-picker/amp-date-picker.js b/examples/visual-tests/amp-date-picker/amp-date-picker.js
index 5e3b42dbfa75..3a92b09bc022 100644
--- a/examples/visual-tests/amp-date-picker/amp-date-picker.js
+++ b/examples/visual-tests/amp-date-picker/amp-date-picker.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {
diff --git a/examples/visual-tests/amp-form/amp-form.js b/examples/visual-tests/amp-form/amp-form.js
index cb3a00289404..996948e3e860 100644
--- a/examples/visual-tests/amp-form/amp-form.js
+++ b/examples/visual-tests/amp-form/amp-form.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {
diff --git a/examples/visual-tests/amp-list/amp-list.amp.js b/examples/visual-tests/amp-list/amp-list.amp.js
index 94d3b4799d0b..3ce0b100e6e2 100644
--- a/examples/visual-tests/amp-list/amp-list.amp.js
+++ b/examples/visual-tests/amp-list/amp-list.amp.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {
diff --git a/examples/visual-tests/amp-mega-menu/amp-mega-menu.js b/examples/visual-tests/amp-mega-menu/amp-mega-menu.js
index 17a3b5a5981a..03612672f687 100644
--- a/examples/visual-tests/amp-mega-menu/amp-mega-menu.js
+++ b/examples/visual-tests/amp-mega-menu/amp-mega-menu.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {
diff --git a/examples/visual-tests/amp-selector.js b/examples/visual-tests/amp-selector.js
index f520f8b27d49..a69f1c7e4186 100644
--- a/examples/visual-tests/amp-selector.js
+++ b/examples/visual-tests/amp-selector.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {
diff --git a/examples/visual-tests/amp-sidebar/amp-sidebar-toolbar.js b/examples/visual-tests/amp-sidebar/amp-sidebar-toolbar.js
index 879214b66575..269ad99576a2 100644
--- a/examples/visual-tests/amp-sidebar/amp-sidebar-toolbar.js
+++ b/examples/visual-tests/amp-sidebar/amp-sidebar-toolbar.js
@@ -1,21 +1,7 @@
 /**
  * @fileoverview Description of this file.
  */
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 'use strict';
 
 const {
diff --git a/examples/visual-tests/amp-sidebar/amp-sidebar.js b/examples/visual-tests/amp-sidebar/amp-sidebar.js
index 3956e65e7f43..6208e427b3d2 100644
--- a/examples/visual-tests/amp-sidebar/amp-sidebar.js
+++ b/examples/visual-tests/amp-sidebar/amp-sidebar.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {
diff --git a/examples/visual-tests/amp-story-player/placeholder.js b/examples/visual-tests/amp-story-player/placeholder.js
index 0cadc68b96a0..07a6cb2fcef5 100644
--- a/examples/visual-tests/amp-story-player/placeholder.js
+++ b/examples/visual-tests/amp-story-player/placeholder.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = {
diff --git a/examples/visual-tests/amp-story-player/player-amp-version.js b/examples/visual-tests/amp-story-player/player-amp-version.js
index a0cadce99113..416b0cc64eff 100644
--- a/examples/visual-tests/amp-story-player/player-amp-version.js
+++ b/examples/visual-tests/amp-story-player/player-amp-version.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = {
diff --git a/examples/visual-tests/amp-story-player/story-loaded.js b/examples/visual-tests/amp-story-player/story-loaded.js
index 80b41582f0ee..af26d0a23941 100644
--- a/examples/visual-tests/amp-story-player/story-loaded.js
+++ b/examples/visual-tests/amp-story-player/story-loaded.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = {
diff --git a/examples/visual-tests/amp-story/amp-story-ad.js b/examples/visual-tests/amp-story/amp-story-ad.js
index c171218c2ab6..8421f0f945a7 100644
--- a/examples/visual-tests/amp-story/amp-story-ad.js
+++ b/examples/visual-tests/amp-story/amp-story-ad.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {
diff --git a/examples/visual-tests/amp-story/amp-story-consent.js b/examples/visual-tests/amp-story/amp-story-consent.js
index d686b53d873b..519065852c34 100644
--- a/examples/visual-tests/amp-story/amp-story-consent.js
+++ b/examples/visual-tests/amp-story/amp-story-consent.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = {
diff --git a/examples/visual-tests/amp-story/amp-story-landscape-templates.js b/examples/visual-tests/amp-story/amp-story-landscape-templates.js
index 984b2fc46767..11832dd7e9cd 100644
--- a/examples/visual-tests/amp-story/amp-story-landscape-templates.js
+++ b/examples/visual-tests/amp-story/amp-story-landscape-templates.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = {
diff --git a/examples/visual-tests/amp-story/amp-story-live-story.js b/examples/visual-tests/amp-story/amp-story-live-story.js
index 16f0e76a6f53..4c8933b6ba86 100644
--- a/examples/visual-tests/amp-story/amp-story-live-story.js
+++ b/examples/visual-tests/amp-story/amp-story-live-story.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = {
diff --git a/examples/visual-tests/amp-story/amp-story-page-attachment.js b/examples/visual-tests/amp-story/amp-story-page-attachment.js
index ccc69ebd007c..cfb87f731191 100644
--- a/examples/visual-tests/amp-story/amp-story-page-attachment.js
+++ b/examples/visual-tests/amp-story/amp-story-page-attachment.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {
diff --git a/examples/visual-tests/amp-story/amp-story-pagination-buttons.js b/examples/visual-tests/amp-story/amp-story-pagination-buttons.js
index 3f3561faa4b4..de115c42e646 100644
--- a/examples/visual-tests/amp-story/amp-story-pagination-buttons.js
+++ b/examples/visual-tests/amp-story/amp-story-pagination-buttons.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {
diff --git a/examples/visual-tests/amp-story/amp-story-sidebar.js b/examples/visual-tests/amp-story/amp-story-sidebar.js
index 6c757a9b01d3..3f3aaaab9757 100644
--- a/examples/visual-tests/amp-story/amp-story-sidebar.js
+++ b/examples/visual-tests/amp-story/amp-story-sidebar.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {
diff --git a/examples/visual-tests/amp-story/amp-story-tooltip-desktop.js b/examples/visual-tests/amp-story/amp-story-tooltip-desktop.js
index 43f6f58410da..53a643f2b338 100644
--- a/examples/visual-tests/amp-story/amp-story-tooltip-desktop.js
+++ b/examples/visual-tests/amp-story/amp-story-tooltip-desktop.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {
diff --git a/examples/visual-tests/amp-story/amp-story-tooltip.js b/examples/visual-tests/amp-story/amp-story-tooltip.js
index f4f18c441853..0f1eb389bc26 100644
--- a/examples/visual-tests/amp-story/amp-story-tooltip.js
+++ b/examples/visual-tests/amp-story/amp-story-tooltip.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {
diff --git a/examples/visual-tests/amp-user-notification/amp-user-notification.js b/examples/visual-tests/amp-user-notification/amp-user-notification.js
index 76e0d5fed5d7..5e8acf265a03 100644
--- a/examples/visual-tests/amp-user-notification/amp-user-notification.js
+++ b/examples/visual-tests/amp-user-notification/amp-user-notification.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = {
diff --git a/examples/visual-tests/amp-video-docking/amp-video-docking.js b/examples/visual-tests/amp-video-docking/amp-video-docking.js
index ef2b8c4b8237..9c67593f4e94 100644
--- a/examples/visual-tests/amp-video-docking/amp-video-docking.js
+++ b/examples/visual-tests/amp-video-docking/amp-video-docking.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 const {
diff --git a/examples/visual-tests/amphtml-ads/adchoices.js b/examples/visual-tests/amphtml-ads/adchoices.js
index c86ec32cb0b5..65e134da912c 100644
--- a/examples/visual-tests/amphtml-ads/adchoices.js
+++ b/examples/visual-tests/amphtml-ads/adchoices.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 'use strict';
 
 const {fillIframeSrcdoc} = require('./helpers');
diff --git a/examples/visual-tests/amphtml-ads/helpers.js b/examples/visual-tests/amphtml-ads/helpers.js
index 0ad94d6464fc..0ea968b59b9d 100644
--- a/examples/visual-tests/amphtml-ads/helpers.js
+++ b/examples/visual-tests/amphtml-ads/helpers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 'use strict';
 
 function fillIframeSrcdoc(page) {
diff --git a/examples/visual-tests/amphtml-ads/static.js b/examples/visual-tests/amphtml-ads/static.js
index 19fd55d0e77c..721177c6a846 100644
--- a/examples/visual-tests/amphtml-ads/static.js
+++ b/examples/visual-tests/amphtml-ads/static.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 'use strict';
 
 const {fillIframeSrcdoc} = require('./helpers');
diff --git a/examples/visual-tests/font.amp.404/font.amp.js b/examples/visual-tests/font.amp.404/font.amp.js
index 8fd6353729ae..ce89dee94df7 100644
--- a/examples/visual-tests/font.amp.404/font.amp.js
+++ b/examples/visual-tests/font.amp.404/font.amp.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 module.exports = {
diff --git a/extensions/.eslintrc.js b/extensions/.eslintrc.js
index 784e35c2a479..317bbed007a9 100644
--- a/extensions/.eslintrc.js
+++ b/extensions/.eslintrc.js
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 // These extensions have been modified in the last 2 weeks, so we're not
 // including them yet to minimize disruption to devs actively working on them.
diff --git a/extensions/amp-3d-gltf/0.1/amp-3d-gltf.js b/extensions/amp-3d-gltf/0.1/amp-3d-gltf.js
index 4454ee3b8e06..bafd7ea4793f 100644
--- a/extensions/amp-3d-gltf/0.1/amp-3d-gltf.js
+++ b/extensions/amp-3d-gltf/0.1/amp-3d-gltf.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {ActionTrust} from '#core/constants/action-constants';
 import {Deferred} from '#core/data-structures/promise';
 import {removeElement} from '#core/dom';
diff --git a/extensions/amp-3d-gltf/0.1/test/test-amp-3d-gltf.js b/extensions/amp-3d-gltf/0.1/test/test-amp-3d-gltf.js
index b33995786b7e..e28464650bf4 100644
--- a/extensions/amp-3d-gltf/0.1/test/test-amp-3d-gltf.js
+++ b/extensions/amp-3d-gltf/0.1/test/test-amp-3d-gltf.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-3d-gltf';
 import {createIframeWithMessageStub} from '#testing/iframe';
 
diff --git a/extensions/amp-3q-player/0.1/amp-3q-player.js b/extensions/amp-3q-player/0.1/amp-3q-player.js
index bedc3ee4754f..4b6b571856b9 100644
--- a/extensions/amp-3q-player/0.1/amp-3q-player.js
+++ b/extensions/amp-3q-player/0.1/amp-3q-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {removeElement} from '#core/dom';
 import {
diff --git a/extensions/amp-3q-player/0.1/test/test-amp-3q-player.js b/extensions/amp-3q-player/0.1/test/test-amp-3q-player.js
index 90575f7bff3c..41e24b675c06 100644
--- a/extensions/amp-3q-player/0.1/test/test-amp-3q-player.js
+++ b/extensions/amp-3q-player/0.1/test/test-amp-3q-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-3q-player';
 import {createElementWithAttributes} from '#core/dom';
 import * as fullscreen from '#core/dom/fullscreen';
diff --git a/extensions/amp-3q-player/amp-3q-player.md b/extensions/amp-3q-player/amp-3q-player.md
index b2ca50645c91..9ca998ecaf58 100644
--- a/extensions/amp-3q-player/amp-3q-player.md
+++ b/extensions/amp-3q-player/amp-3q-player.md
@@ -6,22 +6,6 @@ teaser:
   text: Embeds videos from 3Q SDN.
 ---
 
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-3q-player
 
 Enables AMP to embed videos from 3Q SDN into your websites.
diff --git a/extensions/amp-a4a/0.1/a4a-variable-source.js b/extensions/amp-a4a/0.1/a4a-variable-source.js
index 27d591fd1a94..d9df9f7e46df 100644
--- a/extensions/amp-a4a/0.1/a4a-variable-source.js
+++ b/extensions/amp-a4a/0.1/a4a-variable-source.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {
   VariableSource,
diff --git a/extensions/amp-a4a/0.1/amp-a4a.js b/extensions/amp-a4a/0.1/amp-a4a.js
index bef9cdbe6fba..d71b782e30a9 100644
--- a/extensions/amp-a4a/0.1/amp-a4a.js
+++ b/extensions/amp-a4a/0.1/amp-a4a.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {signingServerURLs} from '#ads/_a4a-config';
 
 import {CONSENT_POLICY_STATE} from '#core/constants/consent-state';
diff --git a/extensions/amp-a4a/0.1/amp-ad-network-base.js b/extensions/amp-a4a/0.1/amp-ad-network-base.js
index ccc215b17732..a2b5a5ed34b0 100644
--- a/extensions/amp-a4a/0.1/amp-ad-network-base.js
+++ b/extensions/amp-a4a/0.1/amp-ad-network-base.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isLayoutSizeDefined} from '#core/dom/layout';
 import {map} from '#core/types/object';
 
diff --git a/extensions/amp-a4a/0.1/amp-ad-template-helper.js b/extensions/amp-a4a/0.1/amp-ad-template-helper.js
index e65dc1c3a3f1..f39a7ba3191e 100644
--- a/extensions/amp-a4a/0.1/amp-ad-template-helper.js
+++ b/extensions/amp-a4a/0.1/amp-ad-template-helper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {LruCache} from '#core/data-structures/lru-cache';
 import {createElementWithAttributes} from '#core/dom';
 import {isArray} from '#core/types';
diff --git a/extensions/amp-a4a/0.1/amp-ad-type-defs.js b/extensions/amp-a4a/0.1/amp-ad-type-defs.js
index 65487506f532..5b0d617d7db9 100644
--- a/extensions/amp-a4a/0.1/amp-ad-type-defs.js
+++ b/extensions/amp-a4a/0.1/amp-ad-type-defs.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @typedef {{
       width: string,
       height: string,
diff --git a/extensions/amp-a4a/0.1/amp-ad-utils.js b/extensions/amp-a4a/0.1/amp-ad-utils.js
index baa3db4121e9..4e5660c14658 100644
--- a/extensions/amp-a4a/0.1/amp-ad-utils.js
+++ b/extensions/amp-a4a/0.1/amp-ad-utils.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {isArray, isObject} from '#core/types';
 import {parseJson} from '#core/types/object/json';
 
diff --git a/extensions/amp-a4a/0.1/cryptographic-validator.js b/extensions/amp-a4a/0.1/cryptographic-validator.js
index 0727be4da9c6..8966da70d1e5 100644
--- a/extensions/amp-a4a/0.1/cryptographic-validator.js
+++ b/extensions/amp-a4a/0.1/cryptographic-validator.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {signingServerURLs} from '#ads/_a4a-config';
 
 import {utf8Decode} from '#core/types/string/bytes';
diff --git a/extensions/amp-a4a/0.1/friendly-frame-renderer.js b/extensions/amp-a4a/0.1/friendly-frame-renderer.js
index 4df95769b34c..b0f270201224 100644
--- a/extensions/amp-a4a/0.1/friendly-frame-renderer.js
+++ b/extensions/amp-a4a/0.1/friendly-frame-renderer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Renderer} from './amp-ad-type-defs';
 import {renderCreativeIntoFriendlyFrame} from './friendly-frame-util';
 
diff --git a/extensions/amp-a4a/0.1/friendly-frame-util.js b/extensions/amp-a4a/0.1/friendly-frame-util.js
index 803cf8a1933c..0271131ec91e 100644
--- a/extensions/amp-a4a/0.1/friendly-frame-util.js
+++ b/extensions/amp-a4a/0.1/friendly-frame-util.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes} from '#core/dom';
 import {setStyle} from '#core/dom/style';
 import {dict} from '#core/types/object';
diff --git a/extensions/amp-a4a/0.1/head-validation.js b/extensions/amp-a4a/0.1/head-validation.js
index b225bfdce0ab..1e60cc0e22ce 100644
--- a/extensions/amp-a4a/0.1/head-validation.js
+++ b/extensions/amp-a4a/0.1/head-validation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeElement, rootNodeFor} from '#core/dom';
 import {map} from '#core/types/object';
 import {includes} from '#core/types/string';
diff --git a/extensions/amp-a4a/0.1/name-frame-renderer.js b/extensions/amp-a4a/0.1/name-frame-renderer.js
index 9dae8901c644..7365ad20aaa5 100644
--- a/extensions/amp-a4a/0.1/name-frame-renderer.js
+++ b/extensions/amp-a4a/0.1/name-frame-renderer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes} from '#core/dom';
 import {
   intersectionEntryToJson,
diff --git a/extensions/amp-a4a/0.1/refresh-manager.js b/extensions/amp-a4a/0.1/refresh-manager.js
index e29d8d140c9b..bbe837ca8fa4 100644
--- a/extensions/amp-a4a/0.1/refresh-manager.js
+++ b/extensions/amp-a4a/0.1/refresh-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {Services} from '#service';
diff --git a/extensions/amp-a4a/0.1/secure-frame.js b/extensions/amp-a4a/0.1/secure-frame.js
index 80d66f4ae3b0..1e71252ecc46 100644
--- a/extensions/amp-a4a/0.1/secure-frame.js
+++ b/extensions/amp-a4a/0.1/secure-frame.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes, escapeHtml} from '#core/dom';
 import {dict} from '#core/types/object';
 
diff --git a/extensions/amp-a4a/0.1/signature-verifier.js b/extensions/amp-a4a/0.1/signature-verifier.js
index 698b7b3ca624..19056751cef3 100644
--- a/extensions/amp-a4a/0.1/signature-verifier.js
+++ b/extensions/amp-a4a/0.1/signature-verifier.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isArray} from '#core/types';
 import {base64DecodeToBytes} from '#core/types/string/base64';
 
diff --git a/extensions/amp-a4a/0.1/template-renderer.js b/extensions/amp-a4a/0.1/template-renderer.js
index c4a136121e93..bbb1863aaa3c 100644
--- a/extensions/amp-a4a/0.1/template-renderer.js
+++ b/extensions/amp-a4a/0.1/template-renderer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getAmpAdTemplateHelper} from './amp-ad-template-helper';
 import {Renderer} from './amp-ad-type-defs';
 import {renderCreativeIntoFriendlyFrame} from './friendly-frame-util';
diff --git a/extensions/amp-a4a/0.1/template-validator.js b/extensions/amp-a4a/0.1/template-validator.js
index 63d470802a35..2595f32548c3 100644
--- a/extensions/amp-a4a/0.1/template-validator.js
+++ b/extensions/amp-a4a/0.1/template-validator.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {tryParseJson} from '#core/types/object/json';
 import {utf8Decode} from '#core/types/string/bytes';
 
diff --git a/extensions/amp-a4a/0.1/test/fetch-mock.js b/extensions/amp-a4a/0.1/test/fetch-mock.js
index 98b456b5ff38..b7b8e1dfed1a 100644
--- a/extensions/amp-a4a/0.1/test/fetch-mock.js
+++ b/extensions/amp-a4a/0.1/test/fetch-mock.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview
  * @deprecated Do not use this in new code. Use env.fetchMock instead. Its API
diff --git a/extensions/amp-a4a/0.1/test/test-a4a-integration.js b/extensions/amp-a4a/0.1/test/test-a4a-integration.js
index ea4e14e3d862..24ff5369fa6a 100644
--- a/extensions/amp-a4a/0.1/test/test-a4a-integration.js
+++ b/extensions/amp-a4a/0.1/test/test-a4a-integration.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Need the following side-effect import because in actual production code,
 // Fast Fetch impls are always loaded via an AmpAd tag, which means AmpAd is
 // always available for them. However, when we test an impl in isolation,
diff --git a/extensions/amp-a4a/0.1/test/test-a4a-var-source.js b/extensions/amp-a4a/0.1/test/test-a4a-var-source.js
index 57c251dd4d52..9b122c7facb2 100644
--- a/extensions/amp-a4a/0.1/test/test-a4a-var-source.js
+++ b/extensions/amp-a4a/0.1/test/test-a4a-var-source.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {installDocumentInfoServiceForDoc} from '#service/document-info-impl';
 
 import {createIframePromise} from '#testing/iframe';
diff --git a/extensions/amp-a4a/0.1/test/test-amp-a4a-within-viewport.js b/extensions/amp-a4a/0.1/test/test-amp-a4a-within-viewport.js
index fae4dc22fd59..c4833b46836d 100644
--- a/extensions/amp-a4a/0.1/test/test-amp-a4a-within-viewport.js
+++ b/extensions/amp-a4a/0.1/test/test-amp-a4a-within-viewport.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Need the following side-effect import because in actual production code,
 // Fast Fetch impls are always loaded via an AmpAd tag, which means AmpAd is
 // always available for them. However, when we test an impl in isolation,
diff --git a/extensions/amp-a4a/0.1/test/test-amp-a4a.js b/extensions/amp-a4a/0.1/test/test-amp-a4a.js
index b74eb1828dbb..df5b4030ccb5 100644
--- a/extensions/amp-a4a/0.1/test/test-amp-a4a.js
+++ b/extensions/amp-a4a/0.1/test/test-amp-a4a.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../../../amp-ad/0.1/amp-ad-xorigin-iframe-handler';
 // Need the following side-effect import because in actual production code,
 // Fast Fetch impls are always loaded via an AmpAd tag, which means AmpAd is
diff --git a/extensions/amp-a4a/0.1/test/test-amp-ad-template-helper.js b/extensions/amp-a4a/0.1/test/test-amp-ad-template-helper.js
index 23fa56d8c689..f3ea71e60c21 100644
--- a/extensions/amp-a4a/0.1/test/test-amp-ad-template-helper.js
+++ b/extensions/amp-a4a/0.1/test/test-amp-ad-template-helper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../../../amp-mustache/0.2/amp-mustache';
 import {Xhr} from '#service/xhr-impl';
 
diff --git a/extensions/amp-a4a/0.1/test/test-amp-ad-utils.js b/extensions/amp-a4a/0.1/test/test-amp-ad-utils.js
index 567adbad72e1..b3d3084bd32e 100644
--- a/extensions/amp-a4a/0.1/test/test-amp-ad-utils.js
+++ b/extensions/amp-a4a/0.1/test/test-amp-ad-utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {data} from './testdata/valid_css_at_rules_amp.reserialized';
 
 import {
diff --git a/extensions/amp-a4a/0.1/test/test-cryptographic-validator.js b/extensions/amp-a4a/0.1/test/test-cryptographic-validator.js
index 247db2b93458..1cbc03dc5c72 100644
--- a/extensions/amp-a4a/0.1/test/test-cryptographic-validator.js
+++ b/extensions/amp-a4a/0.1/test/test-cryptographic-validator.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {utf8Encode} from '#core/types/string/bytes';
 
 import {data} from './testdata/valid_css_at_rules_amp.reserialized';
diff --git a/extensions/amp-a4a/0.1/test/test-friendly-frame-renderer.js b/extensions/amp-a4a/0.1/test/test-friendly-frame-renderer.js
index 689e62c34cba..a1766cb2109a 100644
--- a/extensions/amp-a4a/0.1/test/test-friendly-frame-renderer.js
+++ b/extensions/amp-a4a/0.1/test/test-friendly-frame-renderer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {FriendlyFrameRenderer} from '../friendly-frame-renderer';
 
 const realWinConfig = {
diff --git a/extensions/amp-a4a/0.1/test/test-friendly-frame-util.js b/extensions/amp-a4a/0.1/test/test-friendly-frame-util.js
index 07335c6ef754..9fb255795684 100644
--- a/extensions/amp-a4a/0.1/test/test-friendly-frame-util.js
+++ b/extensions/amp-a4a/0.1/test/test-friendly-frame-util.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {renderCreativeIntoFriendlyFrame} from '../friendly-frame-util';
 
 const realWinConfig = {
diff --git a/extensions/amp-a4a/0.1/test/test-head-validation.js b/extensions/amp-a4a/0.1/test/test-head-validation.js
index 1cdd0cebe570..bd7ca9c9642d 100644
--- a/extensions/amp-a4a/0.1/test/test-head-validation.js
+++ b/extensions/amp-a4a/0.1/test/test-head-validation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {rootNodeFor} from '#core/dom';
 
 import {Services} from '#service';
diff --git a/extensions/amp-a4a/0.1/test/test-name-frame-renderer.js b/extensions/amp-a4a/0.1/test/test-name-frame-renderer.js
index 6b537fb0c6a5..e4c9799b9a0b 100644
--- a/extensions/amp-a4a/0.1/test/test-name-frame-renderer.js
+++ b/extensions/amp-a4a/0.1/test/test-name-frame-renderer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseJson} from '#core/types/object/json';
 import {utf8Encode} from '#core/types/string/bytes';
 
diff --git a/extensions/amp-a4a/0.1/test/test-refresh.js b/extensions/amp-a4a/0.1/test/test-refresh.js
index a44059cf8eab..816ae4674c95 100644
--- a/extensions/amp-a4a/0.1/test/test-refresh.js
+++ b/extensions/amp-a4a/0.1/test/test-refresh.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {
diff --git a/extensions/amp-a4a/0.1/test/test-signature-verifier.js b/extensions/amp-a4a/0.1/test/test-signature-verifier.js
index 834f8b90394f..471b23eda143 100644
--- a/extensions/amp-a4a/0.1/test/test-signature-verifier.js
+++ b/extensions/amp-a4a/0.1/test/test-signature-verifier.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // TODO(@jridgewell, #11081): fix linter to allow fixing weird indentation
 
 import {base64EncodeFromBytes} from '#core/types/string/base64';
diff --git a/extensions/amp-a4a/0.1/test/test-template-renderer.js b/extensions/amp-a4a/0.1/test/test-template-renderer.js
index 15e43f7d2482..5cd66f1196e1 100644
--- a/extensions/amp-a4a/0.1/test/test-template-renderer.js
+++ b/extensions/amp-a4a/0.1/test/test-template-renderer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../../../amp-mustache/0.2/amp-mustache';
 import {utf8Encode} from '#core/types/string/bytes';
 
diff --git a/extensions/amp-a4a/0.1/test/test-template-validator.js b/extensions/amp-a4a/0.1/test/test-template-validator.js
index 6e04bbc40132..33b7cc44db53 100644
--- a/extensions/amp-a4a/0.1/test/test-template-validator.js
+++ b/extensions/amp-a4a/0.1/test/test-template-validator.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {utf8Encode} from '#core/types/string/bytes';
 
 import {data} from './testdata/valid_css_at_rules_amp.reserialized';
diff --git a/extensions/amp-a4a/0.1/test/testdata/.eslintrc.js b/extensions/amp-a4a/0.1/test/testdata/.eslintrc.js
index 3d4cdb2129e0..b14eebe4eec4 100644
--- a/extensions/amp-a4a/0.1/test/testdata/.eslintrc.js
+++ b/extensions/amp-a4a/0.1/test/testdata/.eslintrc.js
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
  module.exports = {
   "rules": {
diff --git a/extensions/amp-a4a/0.1/test/testdata/test_fragments.js b/extensions/amp-a4a/0.1/test/testdata/test_fragments.js
index 7fa6efa5c1b8..46e66c97c758 100644
--- a/extensions/amp-a4a/0.1/test/testdata/test_fragments.js
+++ b/extensions/amp-a4a/0.1/test/testdata/test_fragments.js
@@ -1,18 +1,4 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 export const data = {
   minimalDocOneStyleSrcDoc: `<html><head>
diff --git a/extensions/amp-a4a/0.1/test/utils.js b/extensions/amp-a4a/0.1/test/utils.js
index 19eb90fa9bb3..ce8d1ae3751b 100644
--- a/extensions/amp-a4a/0.1/test/utils.js
+++ b/extensions/amp-a4a/0.1/test/utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {AmpA4A} from '../amp-a4a';
diff --git a/extensions/amp-a4a/0.1/within-viewport.js b/extensions/amp-a4a/0.1/within-viewport.js
index ee3bac93a714..129bc4b09f6b 100644
--- a/extensions/amp-a4a/0.1/within-viewport.js
+++ b/extensions/amp-a4a/0.1/within-viewport.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {isIframed} from '#core/dom';
 import {memo} from '#core/types/object';
diff --git a/extensions/amp-a4a/amp-a4a-format.md b/extensions/amp-a4a/amp-a4a-format.md
index 3f41a1c40db5..374e2bf11a59 100644
--- a/extensions/amp-a4a/amp-a4a-format.md
+++ b/extensions/amp-a4a/amp-a4a-format.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMPHTML Ad Creative Format
 
 _If you'd like to propose changes to the standard, please comment on the [Intent
diff --git a/extensions/amp-a4a/refresh.md b/extensions/amp-a4a/refresh.md
index 4523e2588d34..5881457af06a 100644
--- a/extensions/amp-a4a/refresh.md
+++ b/extensions/amp-a4a/refresh.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP Ad Refresh
 
 AMP Ad Refresh permits amp-ad tags using Fast Fetch to undergo periodic refresh events. Each such event issues a new ad request and attempts to display the returned creative.
diff --git a/extensions/amp-access-laterpay/0.1/amp-access-laterpay.css b/extensions/amp-access-laterpay/0.1/amp-access-laterpay.css
index 4ef8f4b0aa5b..74bec749cd42 100644
--- a/extensions/amp-access-laterpay/0.1/amp-access-laterpay.css
+++ b/extensions/amp-access-laterpay/0.1/amp-access-laterpay.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .amp-access-laterpay {
   position: relative;
diff --git a/extensions/amp-access-laterpay/0.1/amp-access-laterpay.js b/extensions/amp-access-laterpay/0.1/amp-access-laterpay.js
index 6c7eba23c9ec..41a2f6369537 100644
--- a/extensions/amp-access-laterpay/0.1/amp-access-laterpay.js
+++ b/extensions/amp-access-laterpay/0.1/amp-access-laterpay.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {LaterpayVendor} from './laterpay-impl';
diff --git a/extensions/amp-access-laterpay/0.1/laterpay-impl.js b/extensions/amp-access-laterpay/0.1/laterpay-impl.js
index fbf19c06ec6e..3f015f9a3b04 100644
--- a/extensions/amp-access-laterpay/0.1/laterpay-impl.js
+++ b/extensions/amp-access-laterpay/0.1/laterpay-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeChildren} from '#core/dom';
 import {dict} from '#core/types/object';
 
diff --git a/extensions/amp-access-laterpay/0.1/test/test-amp-access-laterpay.js b/extensions/amp-access-laterpay/0.1/test/test-amp-access-laterpay.js
index 0b653e536eea..c2a429e1f519 100644
--- a/extensions/amp-access-laterpay/0.1/test/test-amp-access-laterpay.js
+++ b/extensions/amp-access-laterpay/0.1/test/test-amp-access-laterpay.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {LaterpayVendor} from '../laterpay-impl';
 
 const TAG = 'amp-access-laterpay';
diff --git a/extensions/amp-access-laterpay/0.2/amp-access-laterpay.css b/extensions/amp-access-laterpay/0.2/amp-access-laterpay.css
index 4ef8f4b0aa5b..74bec749cd42 100644
--- a/extensions/amp-access-laterpay/0.2/amp-access-laterpay.css
+++ b/extensions/amp-access-laterpay/0.2/amp-access-laterpay.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .amp-access-laterpay {
   position: relative;
diff --git a/extensions/amp-access-laterpay/0.2/amp-access-laterpay.js b/extensions/amp-access-laterpay/0.2/amp-access-laterpay.js
index 07a72fb75a04..62093e742e1d 100644
--- a/extensions/amp-access-laterpay/0.2/amp-access-laterpay.js
+++ b/extensions/amp-access-laterpay/0.2/amp-access-laterpay.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {LaterpayVendor} from './laterpay-impl';
diff --git a/extensions/amp-access-laterpay/0.2/laterpay-impl.js b/extensions/amp-access-laterpay/0.2/laterpay-impl.js
index 942d877dd468..541924477756 100644
--- a/extensions/amp-access-laterpay/0.2/laterpay-impl.js
+++ b/extensions/amp-access-laterpay/0.2/laterpay-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeChildren} from '#core/dom';
 import {dict} from '#core/types/object';
 
diff --git a/extensions/amp-access-laterpay/0.2/test/test-amp-access-laterpay.js b/extensions/amp-access-laterpay/0.2/test/test-amp-access-laterpay.js
index d6f70ead605f..fabaf03adcbf 100644
--- a/extensions/amp-access-laterpay/0.2/test/test-amp-access-laterpay.js
+++ b/extensions/amp-access-laterpay/0.2/test/test-amp-access-laterpay.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {LaterpayVendor} from '../laterpay-impl';
 
 const TAG = 'amp-access-laterpay';
diff --git a/extensions/amp-access-laterpay/amp-access-laterpay.md b/extensions/amp-access-laterpay/amp-access-laterpay.md
index 40a328f30c7a..e67c9f7c4970 100644
--- a/extensions/amp-access-laterpay/amp-access-laterpay.md
+++ b/extensions/amp-access-laterpay/amp-access-laterpay.md
@@ -6,22 +6,6 @@ teaser:
   text: Allows publishers to integrate with the LaterPay micropayments platform.
 ---
 
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-access-laterpay
 
 ## Usage
diff --git a/extensions/amp-access-poool/0.1/amp-access-poool.js b/extensions/amp-access-poool/0.1/amp-access-poool.js
index 32dcd0f40b82..6d3a5545286c 100644
--- a/extensions/amp-access-poool/0.1/amp-access-poool.js
+++ b/extensions/amp-access-poool/0.1/amp-access-poool.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {PooolVendor} from './poool-impl';
diff --git a/extensions/amp-access-poool/0.1/poool-impl.js b/extensions/amp-access-poool/0.1/poool-impl.js
index 5792f43f8023..34735477a652 100644
--- a/extensions/amp-access-poool/0.1/poool-impl.js
+++ b/extensions/amp-access-poool/0.1/poool-impl.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {resetStyles, setStyle, setStyles} from '#core/dom/style';
 import {dict} from '#core/types/object';
 
diff --git a/extensions/amp-access-poool/0.1/test/test-amp-access-poool.js b/extensions/amp-access-poool/0.1/test/test-amp-access-poool.js
index c28326b37e5f..0483117e3345 100644
--- a/extensions/amp-access-poool/0.1/test/test-amp-access-poool.js
+++ b/extensions/amp-access-poool/0.1/test/test-amp-access-poool.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {PooolVendor} from '../poool-impl';
 
 describes.fakeWin(
diff --git a/extensions/amp-access-scroll/0.1/amp-access-scroll.css b/extensions/amp-access-scroll/0.1/amp-access-scroll.css
index 0d39c59431f3..953de383a898 100644
--- a/extensions/amp-access-scroll/0.1/amp-access-scroll.css
+++ b/extensions/amp-access-scroll/0.1/amp-access-scroll.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .amp-access-scroll-bar {
   position: fixed;
diff --git a/extensions/amp-access-scroll/0.1/amp-access-scroll.js b/extensions/amp-access-scroll/0.1/amp-access-scroll.js
index 48aae4690c3f..84d0cbe41e87 100644
--- a/extensions/amp-access-scroll/0.1/amp-access-scroll.js
+++ b/extensions/amp-access-scroll/0.1/amp-access-scroll.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {ScrollAccessVendor} from './scroll-impl';
diff --git a/extensions/amp-access-scroll/0.1/read-depth-tracker.js b/extensions/amp-access-scroll/0.1/read-depth-tracker.js
index eec5522164f6..8af2915dc0dc 100644
--- a/extensions/amp-access-scroll/0.1/read-depth-tracker.js
+++ b/extensions/amp-access-scroll/0.1/read-depth-tracker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {debounce} from '#core/types/function';
 
 import {Services} from '#service';
diff --git a/extensions/amp-access-scroll/0.1/scroll-bar.js b/extensions/amp-access-scroll/0.1/scroll-bar.js
index a807c507b098..e05254b92a8e 100644
--- a/extensions/amp-access-scroll/0.1/scroll-bar.js
+++ b/extensions/amp-access-scroll/0.1/scroll-bar.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {ScrollComponent} from './scroll-component';
diff --git a/extensions/amp-access-scroll/0.1/scroll-component.js b/extensions/amp-access-scroll/0.1/scroll-component.js
index e625e2a05d4b..41ca6e34b8b8 100644
--- a/extensions/amp-access-scroll/0.1/scroll-component.js
+++ b/extensions/amp-access-scroll/0.1/scroll-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes} from '#core/dom';
 import {assertDoesNotContainDisplay, px, setStyles} from '#core/dom/style';
 import {hasOwn} from '#core/types/object';
diff --git a/extensions/amp-access-scroll/0.1/scroll-impl.js b/extensions/amp-access-scroll/0.1/scroll-impl.js
index 620fc2bb0534..c9cdbdca5352 100644
--- a/extensions/amp-access-scroll/0.1/scroll-impl.js
+++ b/extensions/amp-access-scroll/0.1/scroll-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes} from '#core/dom';
 import {dict} from '#core/types/object';
 import {parseQueryString} from '#core/types/string/url';
diff --git a/extensions/amp-access-scroll/0.1/scroll-protocol.js b/extensions/amp-access-scroll/0.1/scroll-protocol.js
index f673096d41bf..3a3ce5c82481 100644
--- a/extensions/amp-access-scroll/0.1/scroll-protocol.js
+++ b/extensions/amp-access-scroll/0.1/scroll-protocol.js
@@ -1,16 +1 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 export const PROTOCOL_VERSION = '1.2';
diff --git a/extensions/amp-access-scroll/0.1/scroll-relay.js b/extensions/amp-access-scroll/0.1/scroll-relay.js
index 28eb61fc0701..53896f9b725d 100644
--- a/extensions/amp-access-scroll/0.1/scroll-relay.js
+++ b/extensions/amp-access-scroll/0.1/scroll-relay.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {listen} from '#core/3p-frame-messaging';
 
 import {getData} from '../../../src/event-helper';
diff --git a/extensions/amp-access-scroll/0.1/scroll-sheet.js b/extensions/amp-access-scroll/0.1/scroll-sheet.js
index 194bb519e328..789c4709a665 100644
--- a/extensions/amp-access-scroll/0.1/scroll-sheet.js
+++ b/extensions/amp-access-scroll/0.1/scroll-sheet.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {toggle} from '#core/dom/style';
 import {dict, hasOwn} from '#core/types/object';
 
diff --git a/extensions/amp-access-scroll/0.1/scroll-url.js b/extensions/amp-access-scroll/0.1/scroll-url.js
index 966ed5403618..44259e87d081 100644
--- a/extensions/amp-access-scroll/0.1/scroll-url.js
+++ b/extensions/amp-access-scroll/0.1/scroll-url.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {PROTOCOL_VERSION} from './scroll-protocol';
 
 import {getMode} from '../../../src/mode';
diff --git a/extensions/amp-access-scroll/0.1/test/read-depth-tracker.js b/extensions/amp-access-scroll/0.1/test/read-depth-tracker.js
index 9d5bea1319cc..527c628ea747 100644
--- a/extensions/amp-access-scroll/0.1/test/read-depth-tracker.js
+++ b/extensions/amp-access-scroll/0.1/test/read-depth-tracker.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {AccessSource} from '../../../amp-access/0.1/amp-access-source';
 import {ReadDepthTracker} from '../read-depth-tracker';
 
diff --git a/extensions/amp-access-scroll/amp-access-scroll.md b/extensions/amp-access-scroll/amp-access-scroll.md
index e7c9221c3887..6484bec7d118 100644
--- a/extensions/amp-access-scroll/amp-access-scroll.md
+++ b/extensions/amp-access-scroll/amp-access-scroll.md
@@ -6,22 +6,6 @@ teaser:
   text: Integrates with Scroll membership.
 ---
 
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-access-scroll
 
 ## Usage
diff --git a/extensions/amp-access/0.1/access-expr.js b/extensions/amp-access/0.1/access-expr.js
index e45e34f3e8a1..93ad09936124 100644
--- a/extensions/amp-access/0.1/access-expr.js
+++ b/extensions/amp-access/0.1/access-expr.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {accessParser as parser} from '#build/parsers/access-expr-impl';
 
 import {hasOwn, map} from '#core/types/object';
diff --git a/extensions/amp-access/0.1/access-vars.js b/extensions/amp-access/0.1/access-vars.js
index efcf25198192..6c3826f87643 100644
--- a/extensions/amp-access/0.1/access-vars.js
+++ b/extensions/amp-access/0.1/access-vars.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Exports the substitution variables for access services.
  *
diff --git a/extensions/amp-access/0.1/access-vendor.js b/extensions/amp-access/0.1/access-vendor.js
index ec7f73014322..6cc0a3c85af3 100644
--- a/extensions/amp-access/0.1/access-vendor.js
+++ b/extensions/amp-access/0.1/access-vendor.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * This interface is intended to be implemented by AMP Access vendors to
  * provide authorization and pingback.
diff --git a/extensions/amp-access/0.1/amp-access-client.js b/extensions/amp-access/0.1/amp-access-client.js
index c0a0dba052bd..2787ee716843 100644
--- a/extensions/amp-access/0.1/amp-access-client.js
+++ b/extensions/amp-access/0.1/amp-access-client.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {Services} from '#service';
diff --git a/extensions/amp-access/0.1/amp-access-iframe.js b/extensions/amp-access/0.1/amp-access-iframe.js
index 550aba962e61..7445a5b2dd3e 100644
--- a/extensions/amp-access/0.1/amp-access-iframe.js
+++ b/extensions/amp-access/0.1/amp-access-iframe.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {toggle} from '#core/dom/style';
 import {isArray} from '#core/types';
diff --git a/extensions/amp-access/0.1/amp-access-other.js b/extensions/amp-access/0.1/amp-access-other.js
index 3ac6fd339273..cbb49b02e506 100644
--- a/extensions/amp-access/0.1/amp-access-other.js
+++ b/extensions/amp-access/0.1/amp-access-other.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dev, devAssert} from '../../../src/log';
 import {isProxyOrigin} from '../../../src/url';
 
diff --git a/extensions/amp-access/0.1/amp-access-server-jwt.js b/extensions/amp-access/0.1/amp-access-server-jwt.js
index 8b3431a4afc2..f9f91b03e821 100644
--- a/extensions/amp-access/0.1/amp-access-server-jwt.js
+++ b/extensions/amp-access/0.1/amp-access-server-jwt.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {escapeCssSelectorIdent} from '#core/dom/css-selectors';
 import {isArray} from '#core/types';
 import {dict} from '#core/types/object';
diff --git a/extensions/amp-access/0.1/amp-access-server.js b/extensions/amp-access/0.1/amp-access-server.js
index 4934216a30bd..b67ac44e55fd 100644
--- a/extensions/amp-access/0.1/amp-access-server.js
+++ b/extensions/amp-access/0.1/amp-access-server.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {escapeCssSelectorIdent} from '#core/dom/css-selectors';
 import {dict} from '#core/types/object';
 import {parseJson} from '#core/types/object/json';
diff --git a/extensions/amp-access/0.1/amp-access-source.js b/extensions/amp-access/0.1/amp-access-source.js
index c80dd6b9d067..b03105087339 100644
--- a/extensions/amp-access/0.1/amp-access-source.js
+++ b/extensions/amp-access/0.1/amp-access-source.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {isEnumValue, isObject} from '#core/types';
 import {dict, getValueForExpr} from '#core/types/object';
diff --git a/extensions/amp-access/0.1/amp-access-vendor.js b/extensions/amp-access/0.1/amp-access-vendor.js
index 5884c6645ac6..9298b4c5c9d7 100644
--- a/extensions/amp-access/0.1/amp-access-vendor.js
+++ b/extensions/amp-access/0.1/amp-access-vendor.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import './access-vendor';
 import {Deferred} from '#core/data-structures/promise';
 
diff --git a/extensions/amp-access/0.1/amp-access.css b/extensions/amp-access/0.1/amp-access.css
index afe69188c987..8b137891791f 100644
--- a/extensions/amp-access/0.1/amp-access.css
+++ b/extensions/amp-access/0.1/amp-access.css
@@ -1,15 +1 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
diff --git a/extensions/amp-access/0.1/amp-access.js b/extensions/amp-access/0.1/amp-access.js
index 52389cdfa8bb..8eb4abeb5428 100644
--- a/extensions/amp-access/0.1/amp-access.js
+++ b/extensions/amp-access/0.1/amp-access.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {AmpEvents} from '#core/constants/amp-events';
 import {TickLabel} from '#core/constants/enums';
diff --git a/extensions/amp-access/0.1/amp-login-done-dialog.js b/extensions/amp-access/0.1/amp-login-done-dialog.js
index 31a2607b8938..3eb82ef6776b 100644
--- a/extensions/amp-access/0.1/amp-login-done-dialog.js
+++ b/extensions/amp-access/0.1/amp-login-done-dialog.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseQueryString, tryDecodeUriComponent} from '#core/types/string/url';
 
 import {listen} from '../../../src/event-helper';
diff --git a/extensions/amp-access/0.1/amp-login-done.js b/extensions/amp-access/0.1/amp-login-done.js
index 7599b33e6881..d06def4e1066 100644
--- a/extensions/amp-access/0.1/amp-login-done.js
+++ b/extensions/amp-access/0.1/amp-login-done.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview The endpoint for returning Login dialog. It passes the return
  * code back to AMP runtime using window messaging.
diff --git a/extensions/amp-access/0.1/iframe-api/DEVELOPING.md b/extensions/amp-access/0.1/iframe-api/DEVELOPING.md
index 10136b0347cb..306fe924df93 100644
--- a/extensions/amp-access/0.1/iframe-api/DEVELOPING.md
+++ b/extensions/amp-access/0.1/iframe-api/DEVELOPING.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-access-iframe-api development
 
 ## Development
diff --git a/extensions/amp-access/0.1/iframe-api/README.md b/extensions/amp-access/0.1/iframe-api/README.md
index 8b9e4688ffa2..928bea1f94d2 100644
--- a/extensions/amp-access/0.1/iframe-api/README.md
+++ b/extensions/amp-access/0.1/iframe-api/README.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-access-iframe-api
 
 The access iframe is an implementation of access protocol that
diff --git a/extensions/amp-access/0.1/iframe-api/access-controller.js b/extensions/amp-access/0.1/iframe-api/access-controller.js
index eebd0ccc53ad..ea5e6cbaaf86 100644
--- a/extensions/amp-access/0.1/iframe-api/access-controller.js
+++ b/extensions/amp-access/0.1/iframe-api/access-controller.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 /*eslint no-unused-vars: 0*/
 
 /**
diff --git a/extensions/amp-access/0.1/iframe-api/amp-iframe-api-export.js b/extensions/amp-access/0.1/iframe-api/amp-iframe-api-export.js
index f8da80db4409..2df29a4eff83 100644
--- a/extensions/amp-access/0.1/iframe-api/amp-iframe-api-export.js
+++ b/extensions/amp-access/0.1/iframe-api/amp-iframe-api-export.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Export of IFrame API.
  */
diff --git a/extensions/amp-access/0.1/iframe-api/iframe-api.js b/extensions/amp-access/0.1/iframe-api/iframe-api.js
index 0905ad845ea5..bcc63cc3f632 100644
--- a/extensions/amp-access/0.1/iframe-api/iframe-api.js
+++ b/extensions/amp-access/0.1/iframe-api/iframe-api.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview The iframe API for access.
  *
diff --git a/extensions/amp-access/0.1/iframe-api/messenger.js b/extensions/amp-access/0.1/iframe-api/messenger.js
index d6b42b0ebaea..567c53947bee 100644
--- a/extensions/amp-access/0.1/iframe-api/messenger.js
+++ b/extensions/amp-access/0.1/iframe-api/messenger.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview The messaging protocol is intentionally kept close to
  * Web Activities (https://github.com/google/web-activities). We may switch
diff --git a/extensions/amp-access/0.1/iframe-api/rollup.config.js b/extensions/amp-access/0.1/iframe-api/rollup.config.js
index 15e83649d0ba..1edcb4b65f36 100644
--- a/extensions/amp-access/0.1/iframe-api/rollup.config.js
+++ b/extensions/amp-access/0.1/iframe-api/rollup.config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import path from 'path';
 import babel from 'rollup-plugin-babel';
 import cleanup from 'rollup-plugin-cleanup';
diff --git a/extensions/amp-access/0.1/jwt.js b/extensions/amp-access/0.1/jwt.js
index 98ca43e9f7c6..c67998a9b2c9 100644
--- a/extensions/amp-access/0.1/jwt.js
+++ b/extensions/amp-access/0.1/jwt.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {tryParseJson} from '#core/types/object/json';
 import {
   base64DecodeToBytes,
diff --git a/extensions/amp-access/0.1/login-dialog.js b/extensions/amp-access/0.1/login-dialog.js
index 0d91b201e70e..55bca9313f4c 100644
--- a/extensions/amp-access/0.1/login-dialog.js
+++ b/extensions/amp-access/0.1/login-dialog.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {Services} from '#service';
diff --git a/extensions/amp-access/0.1/test/test-access-expr.js b/extensions/amp-access/0.1/test/test-access-expr.js
index a09f89c479bc..85e3fd6a2482 100644
--- a/extensions/amp-access/0.1/test/test-access-expr.js
+++ b/extensions/amp-access/0.1/test/test-access-expr.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpAccessEvaluator} from '../access-expr';
 
 describes.sandboxed('evaluate', {}, () => {
diff --git a/extensions/amp-access/0.1/test/test-amp-access-client.js b/extensions/amp-access/0.1/test/test-amp-access-client.js
index 2d88868a90bc..4829a99adfa1 100644
--- a/extensions/amp-access/0.1/test/test-amp-access-client.js
+++ b/extensions/amp-access/0.1/test/test-amp-access-client.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import * as mode from '../../../../src/mode';
diff --git a/extensions/amp-access/0.1/test/test-amp-access-iframe.js b/extensions/amp-access/0.1/test/test-amp-access-iframe.js
index 0df67378bbd2..0eec26b7cc24 100644
--- a/extensions/amp-access/0.1/test/test-amp-access-iframe.js
+++ b/extensions/amp-access/0.1/test/test-amp-access-iframe.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {dev} from '../../../../src/log';
diff --git a/extensions/amp-access/0.1/test/test-amp-access-other.js b/extensions/amp-access/0.1/test/test-amp-access-other.js
index f02226d39200..e15e4dda1d75 100644
--- a/extensions/amp-access/0.1/test/test-amp-access-other.js
+++ b/extensions/amp-access/0.1/test/test-amp-access-other.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AccessOtherAdapter} from '../amp-access-other';
 
 describes.realWin('AccessOtherAdapter', {amp: true}, (env) => {
diff --git a/extensions/amp-access/0.1/test/test-amp-access-server-jwt.js b/extensions/amp-access/0.1/test/test-amp-access-server-jwt.js
index e2d42ce7f614..25fe923731af 100644
--- a/extensions/amp-access/0.1/test/test-amp-access-server-jwt.js
+++ b/extensions/amp-access/0.1/test/test-amp-access-server-jwt.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import * as DocumentFetcher from '../../../../src/document-fetcher';
diff --git a/extensions/amp-access/0.1/test/test-amp-access-server.js b/extensions/amp-access/0.1/test/test-amp-access-server.js
index 70e944b83c01..aedf33ad1c5b 100644
--- a/extensions/amp-access/0.1/test/test-amp-access-server.js
+++ b/extensions/amp-access/0.1/test/test-amp-access-server.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import * as DocumentFetcher from '../../../../src/document-fetcher';
diff --git a/extensions/amp-access/0.1/test/test-amp-access-source.js b/extensions/amp-access/0.1/test/test-amp-access-source.js
index 43cfa791e3a1..6f8bb60a9b04 100644
--- a/extensions/amp-access/0.1/test/test-amp-access-source.js
+++ b/extensions/amp-access/0.1/test/test-amp-access-source.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {toggleExperiment} from '#experiments';
 
 import {cidServiceForDocForTesting} from '#service/cid-impl';
diff --git a/extensions/amp-access/0.1/test/test-amp-access-vendor.js b/extensions/amp-access/0.1/test/test-amp-access-vendor.js
index 2d97909f0c7a..bbe0c60af29a 100644
--- a/extensions/amp-access/0.1/test/test-amp-access-vendor.js
+++ b/extensions/amp-access/0.1/test/test-amp-access-vendor.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AccessVendor} from '../access-vendor';
 import {AccessVendorAdapter} from '../amp-access-vendor';
 
diff --git a/extensions/amp-access/0.1/test/test-amp-access.js b/extensions/amp-access/0.1/test/test-amp-access.js
index 60fbf3721e99..27c4b646a381 100644
--- a/extensions/amp-access/0.1/test/test-amp-access.js
+++ b/extensions/amp-access/0.1/test/test-amp-access.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 import {Observable} from '#core/data-structures/observable';
 
diff --git a/extensions/amp-access/0.1/test/test-amp-login-done-dialog.js b/extensions/amp-access/0.1/test/test-amp-login-done-dialog.js
index b7ba02fc6d6d..feee89655e06 100644
--- a/extensions/amp-access/0.1/test/test-amp-login-done-dialog.js
+++ b/extensions/amp-access/0.1/test/test-amp-login-done-dialog.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {LoginDoneDialog, buildLangSelector} from '../amp-login-done-dialog';
 
 describes.sandboxed('LoginDoneDialog', {}, (env) => {
diff --git a/extensions/amp-access/0.1/test/test-iframe-api.js b/extensions/amp-access/0.1/test/test-iframe-api.js
index 14df7f72006c..a3c47582b90d 100644
--- a/extensions/amp-access/0.1/test/test-iframe-api.js
+++ b/extensions/amp-access/0.1/test/test-iframe-api.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AccessController} from '../iframe-api/access-controller';
 import {AmpAccessIframeApi} from '../iframe-api/iframe-api';
 
diff --git a/extensions/amp-access/0.1/test/test-iframe-messenger.js b/extensions/amp-access/0.1/test/test-iframe-messenger.js
index 316dd6c88ea0..ec5941673b4d 100644
--- a/extensions/amp-access/0.1/test/test-iframe-messenger.js
+++ b/extensions/amp-access/0.1/test/test-iframe-messenger.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Messenger} from '../iframe-api/messenger';
 
 describes.fakeWin('Messenger', {}, (env) => {
diff --git a/extensions/amp-access/0.1/test/test-jwt.js b/extensions/amp-access/0.1/test/test-jwt.js
index 655f8c212221..d1db372450c6 100644
--- a/extensions/amp-access/0.1/test/test-jwt.js
+++ b/extensions/amp-access/0.1/test/test-jwt.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {JwtHelper, pemToBytes} from '../jwt';
 
 describes.sandboxed('JwtHelper', {}, (env) => {
diff --git a/extensions/amp-access/0.1/test/test-login-dialog.js b/extensions/amp-access/0.1/test/test-login-dialog.js
index 844cd0996ea9..8842d06d4c28 100644
--- a/extensions/amp-access/0.1/test/test-login-dialog.js
+++ b/extensions/amp-access/0.1/test/test-login-dialog.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {installDocService} from '#service/ampdoc-impl';
 
diff --git a/extensions/amp-access/amp-access-analytics.md b/extensions/amp-access/amp-access-analytics.md
index 0b4f28a5a1d9..e00b9688a9cf 100644
--- a/extensions/amp-access/amp-access-analytics.md
+++ b/extensions/amp-access/amp-access-analytics.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP Access and Analytics
 
 ## Access analytics triggers
diff --git a/extensions/amp-accordion/0.1/amp-accordion.css b/extensions/amp-accordion/0.1/amp-accordion.css
index 80ab21976e1b..159debfe5791 100644
--- a/extensions/amp-accordion/0.1/amp-accordion.css
+++ b/extensions/amp-accordion/0.1/amp-accordion.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * Restore the default layout from ampshared.css, which only used until
diff --git a/extensions/amp-accordion/0.1/amp-accordion.js b/extensions/amp-accordion/0.1/amp-accordion.js
index 97a9f3f4ab00..a38dae9daaf9 100644
--- a/extensions/amp-accordion/0.1/amp-accordion.js
+++ b/extensions/amp-accordion/0.1/amp-accordion.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {Keys} from '#core/constants/key-codes';
 import {bezierCurve} from '#core/data-structures/curve';
diff --git a/extensions/amp-accordion/0.1/amp-accordion.md b/extensions/amp-accordion/0.1/amp-accordion.md
index 4246d0b6bc15..c2d4e5645d29 100644
--- a/extensions/amp-accordion/0.1/amp-accordion.md
+++ b/extensions/amp-accordion/0.1/amp-accordion.md
@@ -8,22 +8,6 @@ teaser:
   text: A stacked list of headers that collapse or expand content sections with user interaction.
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-accordion
 
 Provides a way for viewers to glance at the content outline and jump to any section. This is helpful for mobile devices where even a couple of sentences into a section requires scrolling.
diff --git a/extensions/amp-accordion/0.1/test/integration/test-amp-accordion.js b/extensions/amp-accordion/0.1/test/integration/test-amp-accordion.js
index 6bea056bc7ca..960569e786a5 100644
--- a/extensions/amp-accordion/0.1/test/integration/test-amp-accordion.js
+++ b/extensions/amp-accordion/0.1/test/integration/test-amp-accordion.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.sandboxed
   .configure()
   .skipEdge()
diff --git a/extensions/amp-accordion/0.1/test/test-amp-accordion.js b/extensions/amp-accordion/0.1/test/test-amp-accordion.js
index 5acf61bfdcf2..41b9f092021f 100644
--- a/extensions/amp-accordion/0.1/test/test-amp-accordion.js
+++ b/extensions/amp-accordion/0.1/test/test-amp-accordion.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-accordion';
 import {ActionTrust} from '#core/constants/action-constants';
 import {Keys} from '#core/constants/key-codes';
diff --git a/extensions/amp-accordion/1.0/amp-accordion.css b/extensions/amp-accordion/1.0/amp-accordion.css
index 1c82ba1dce8c..8ffb1bfcfc68 100644
--- a/extensions/amp-accordion/1.0/amp-accordion.css
+++ b/extensions/amp-accordion/1.0/amp-accordion.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * Pre-upgrade:
diff --git a/extensions/amp-accordion/1.0/amp-accordion.js b/extensions/amp-accordion/1.0/amp-accordion.js
index 9880563a2ed6..7117b7f7296b 100644
--- a/extensions/amp-accordion/1.0/amp-accordion.js
+++ b/extensions/amp-accordion/1.0/amp-accordion.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {toWin} from '#core/window';
 
diff --git a/extensions/amp-accordion/1.0/animations.js b/extensions/amp-accordion/1.0/animations.js
index 8ef88ca01298..4f4fd9063155 100644
--- a/extensions/amp-accordion/1.0/animations.js
+++ b/extensions/amp-accordion/1.0/animations.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getStyle, setStyles} from '#core/dom/style';
 
 const MAX_TRANSITION_DURATION = 500; // ms
diff --git a/extensions/amp-accordion/1.0/base-element.js b/extensions/amp-accordion/1.0/base-element.js
index ee71c35831be..303444368a08 100644
--- a/extensions/amp-accordion/1.0/base-element.js
+++ b/extensions/amp-accordion/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {toggleAttribute} from '#core/dom';
 import {childElementsByTag} from '#core/dom/query';
 import {toArray} from '#core/types/array';
diff --git a/extensions/amp-accordion/1.0/component.js b/extensions/amp-accordion/1.0/component.js
index a3ac4017a1bf..f14105a02e62 100644
--- a/extensions/amp-accordion/1.0/component.js
+++ b/extensions/amp-accordion/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import objstr from 'obj-str';
 
 import {
diff --git a/extensions/amp-accordion/1.0/component.jss.js b/extensions/amp-accordion/1.0/component.jss.js
index dfb85326aa99..bfa615e939fe 100644
--- a/extensions/amp-accordion/1.0/component.jss.js
+++ b/extensions/amp-accordion/1.0/component.jss.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createUseStyles} from 'react-jss';
 
 const sectionChild = {
diff --git a/extensions/amp-accordion/1.0/component.type.js b/extensions/amp-accordion/1.0/component.type.js
index 6ffcbad63204..242e5c857ae8 100644
--- a/extensions/amp-accordion/1.0/component.type.js
+++ b/extensions/amp-accordion/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-accordion/1.0/storybook/Basic.amp.js b/extensions/amp-accordion/1.0/storybook/Basic.amp.js
index ea158d08d2d7..74960534cf67 100644
--- a/extensions/amp-accordion/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-accordion/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {boolean, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-accordion/1.0/storybook/Basic.js b/extensions/amp-accordion/1.0/storybook/Basic.js
index 90ea822e9610..55b63f9e9f66 100644
--- a/extensions/amp-accordion/1.0/storybook/Basic.js
+++ b/extensions/amp-accordion/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {boolean, withKnobs} from '@storybook/addon-knobs';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-accordion/1.0/storybook/Bind.amp.js b/extensions/amp-accordion/1.0/storybook/Bind.amp.js
index c7393cfce5f5..d6ea4319cae8 100644
--- a/extensions/amp-accordion/1.0/storybook/Bind.amp.js
+++ b/extensions/amp-accordion/1.0/storybook/Bind.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {boolean, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-accordion/1.0/test-e2e/test-amp-accordion.js b/extensions/amp-accordion/1.0/test-e2e/test-amp-accordion.js
index a5da4b34f6eb..464233949743 100644
--- a/extensions/amp-accordion/1.0/test-e2e/test-amp-accordion.js
+++ b/extensions/amp-accordion/1.0/test-e2e/test-amp-accordion.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-accordion',
   {
diff --git a/extensions/amp-accordion/1.0/test-e2e/test-single-expand.js b/extensions/amp-accordion/1.0/test-e2e/test-single-expand.js
index da14c56dfc71..20da95b3f782 100644
--- a/extensions/amp-accordion/1.0/test-e2e/test-single-expand.js
+++ b/extensions/amp-accordion/1.0/test-e2e/test-single-expand.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-accordion',
   {
diff --git a/extensions/amp-accordion/1.0/test/test-amp-accordion.js b/extensions/amp-accordion/1.0/test/test-amp-accordion.js
index 435429509cfe..ee5d7eeb2091 100644
--- a/extensions/amp-accordion/1.0/test/test-amp-accordion.js
+++ b/extensions/amp-accordion/1.0/test/test-amp-accordion.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import '../amp-accordion';
 import {ActionTrust} from '#core/constants/action-constants';
 import {subscribe, unsubscribe} from '#core/context';
diff --git a/extensions/amp-accordion/1.0/test/test-component.js b/extensions/amp-accordion/1.0/test/test-component.js
index 4b9d64b53157..dce4f177afe6 100644
--- a/extensions/amp-accordion/1.0/test/test-component.js
+++ b/extensions/amp-accordion/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {mount} from 'enzyme';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-accordion/amp-accordion.md b/extensions/amp-accordion/amp-accordion.md
index 6e099923d3e6..29e0bd96bbc6 100644
--- a/extensions/amp-accordion/amp-accordion.md
+++ b/extensions/amp-accordion/amp-accordion.md
@@ -8,22 +8,6 @@ experimental: true
 bento: true
 ---
 
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-accordion
 
 Provides a way for viewers to glance at the content outline and jump to any section. This is helpful for mobile devices where even a couple of sentences into a section requires scrolling.
diff --git a/extensions/amp-action-macro/0.1/amp-action-macro.js b/extensions/amp-action-macro/0.1/amp-action-macro.js
index 4a769dfcd134..2438a3846b21 100644
--- a/extensions/amp-action-macro/0.1/amp-action-macro.js
+++ b/extensions/amp-action-macro/0.1/amp-action-macro.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {LayoutPriority} from '#core/dom/layout';
 
 import {Services} from '#service';
diff --git a/extensions/amp-action-macro/0.1/test/test-amp-action-macro.js b/extensions/amp-action-macro/0.1/test/test-amp-action-macro.js
index 04f3b576f2cb..904cdb5fc793 100644
--- a/extensions/amp-action-macro/0.1/test/test-amp-action-macro.js
+++ b/extensions/amp-action-macro/0.1/test/test-amp-action-macro.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 
 import {Services} from '#service';
diff --git a/extensions/amp-ad-custom/0.1/amp-ad-custom.js b/extensions/amp-ad-custom/0.1/amp-ad-custom.js
index 226a710bd017..7ee19def645f 100644
--- a/extensions/amp-ad-custom/0.1/amp-ad-custom.js
+++ b/extensions/amp-ad-custom/0.1/amp-ad-custom.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {devAssert} from '../../../src/log';
diff --git a/extensions/amp-ad-custom/0.1/test/test-amp-ad-custom.js b/extensions/amp-ad-custom/0.1/test/test-amp-ad-custom.js
index 37b072be85ef..cf4328de056f 100644
--- a/extensions/amp-ad-custom/0.1/test/test-amp-ad-custom.js
+++ b/extensions/amp-ad-custom/0.1/test/test-amp-ad-custom.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../../../amp-mustache/0.2/amp-mustache';
 import {tryParseJson} from '#core/types/object/json';
 import {utf8Encode} from '#core/types/string/bytes';
diff --git a/extensions/amp-ad-custom/amp-ad-custom.md b/extensions/amp-ad-custom/amp-ad-custom.md
index 334effc378a1..5058bc4519ba 100644
--- a/extensions/amp-ad-custom/amp-ad-custom.md
+++ b/extensions/amp-ad-custom/amp-ad-custom.md
@@ -6,22 +6,6 @@ teaser:
   text: Alternative way to serve valid AMPHTML ads.
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP Template Ad Integration Guidelines
 
 ## Overview
diff --git a/extensions/amp-ad-exit/0.1/amp-ad-exit.js b/extensions/amp-ad-exit/0.1/amp-ad-exit.js
index 52b0d5d41d13..ccdabb5d0fdd 100644
--- a/extensions/amp-ad-exit/0.1/amp-ad-exit.js
+++ b/extensions/amp-ad-exit/0.1/amp-ad-exit.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   MessageType,
   deserializeMessage,
diff --git a/extensions/amp-ad-exit/0.1/config.js b/extensions/amp-ad-exit/0.1/config.js
index f0873958654a..31e9c70412f0 100644
--- a/extensions/amp-ad-exit/0.1/config.js
+++ b/extensions/amp-ad-exit/0.1/config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {FilterType} from './filters/filter';
 
 import {user, userAssert} from '../../../src/log';
diff --git a/extensions/amp-ad-exit/0.1/filters/click-delay.js b/extensions/amp-ad-exit/0.1/filters/click-delay.js
index 270c72ebceaf..edc1d5df916c 100644
--- a/extensions/amp-ad-exit/0.1/filters/click-delay.js
+++ b/extensions/amp-ad-exit/0.1/filters/click-delay.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Filter, FilterType} from './filter';
 
 import {dev, userAssert} from '../../../../src/log';
diff --git a/extensions/amp-ad-exit/0.1/filters/click-location.js b/extensions/amp-ad-exit/0.1/filters/click-location.js
index 97dd9a078501..7e8b74f3a2cb 100644
--- a/extensions/amp-ad-exit/0.1/filters/click-location.js
+++ b/extensions/amp-ad-exit/0.1/filters/click-location.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Filter, FilterType} from './filter';
 
 import {userAssert} from '../../../../src/log';
diff --git a/extensions/amp-ad-exit/0.1/filters/factory.js b/extensions/amp-ad-exit/0.1/filters/factory.js
index 61c7b5b39c60..2cb2eb22ca07 100644
--- a/extensions/amp-ad-exit/0.1/filters/factory.js
+++ b/extensions/amp-ad-exit/0.1/filters/factory.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ClickDelayFilter} from './click-delay';
 import {ClickLocationFilter} from './click-location';
 import {FilterType} from './filter';
diff --git a/extensions/amp-ad-exit/0.1/filters/filter.js b/extensions/amp-ad-exit/0.1/filters/filter.js
index 9c9188eeb872..676b9cae75f8 100644
--- a/extensions/amp-ad-exit/0.1/filters/filter.js
+++ b/extensions/amp-ad-exit/0.1/filters/filter.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @enum {string} */
 export const FilterType = {
   CLICK_DELAY: 'clickDelay',
diff --git a/extensions/amp-ad-exit/0.1/filters/inactive-element.js b/extensions/amp-ad-exit/0.1/filters/inactive-element.js
index 39f2eb18ee49..6d1706af9181 100644
--- a/extensions/amp-ad-exit/0.1/filters/inactive-element.js
+++ b/extensions/amp-ad-exit/0.1/filters/inactive-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {matches} from '#core/dom/query';
 
 import {Filter, FilterType} from './filter';
diff --git a/extensions/amp-ad-exit/0.1/test-e2e/test-amp-ad-exit.js b/extensions/amp-ad-exit/0.1/test-e2e/test-amp-ad-exit.js
index d977d6e9e03a..4fe5f25e2d8a 100644
--- a/extensions/amp-ad-exit/0.1/test-e2e/test-amp-ad-exit.js
+++ b/extensions/amp-ad-exit/0.1/test-e2e/test-amp-ad-exit.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-ad-exit',
   {
diff --git a/extensions/amp-ad-exit/0.1/test/filters/test-click-delay.js b/extensions/amp-ad-exit/0.1/test/filters/test-click-delay.js
index eb14572ffd5c..5de094ca41dd 100644
--- a/extensions/amp-ad-exit/0.1/test/filters/test-click-delay.js
+++ b/extensions/amp-ad-exit/0.1/test/filters/test-click-delay.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ClickDelayFilter} from '../../filters/click-delay';
 import {FilterType} from '../../filters/filter';
 
diff --git a/extensions/amp-ad-exit/0.1/test/test-amp-ad-exit.js b/extensions/amp-ad-exit/0.1/test/test-amp-ad-exit.js
index 7859990cb191..952dddfb15e4 100644
--- a/extensions/amp-ad-exit/0.1/test/test-amp-ad-exit.js
+++ b/extensions/amp-ad-exit/0.1/test/test-amp-ad-exit.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {toggleExperiment} from '#experiments';
 
 import {installPlatformService} from '#service/platform-impl';
diff --git a/extensions/amp-ad-network-adsense-impl/0.1/adsense-shared-state.js b/extensions/amp-ad-network-adsense-impl/0.1/adsense-shared-state.js
index 3e7d8b27ad1c..9fa8a38b52a9 100644
--- a/extensions/amp-ad-network-adsense-impl/0.1/adsense-shared-state.js
+++ b/extensions/amp-ad-network-adsense-impl/0.1/adsense-shared-state.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert} from '../../../src/log';
 
 /**
diff --git a/extensions/amp-ad-network-adsense-impl/0.1/amp-ad-network-adsense-impl.js b/extensions/amp-ad-network-adsense-impl/0.1/amp-ad-network-adsense-impl.js
index ee0b6fb9c93c..11c2d3d8e299 100644
--- a/extensions/amp-ad-network-adsense-impl/0.1/amp-ad-network-adsense-impl.js
+++ b/extensions/amp-ad-network-adsense-impl/0.1/amp-ad-network-adsense-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Because AdSense and DoubleClick are both operated by Google and their A4A
 // implementations share some behavior in common, part of the logic for this
 // implementation is located in the ads/google/a4a directory rather than here.
diff --git a/extensions/amp-ad-network-adsense-impl/0.1/responsive-state.js b/extensions/amp-ad-network-adsense-impl/0.1/responsive-state.js
index 2bb71bca051e..d3b3c70892ce 100644
--- a/extensions/amp-ad-network-adsense-impl/0.1/responsive-state.js
+++ b/extensions/amp-ad-network-adsense-impl/0.1/responsive-state.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {addExperimentIdToElement} from '#ads/google/a4a/traffic-experiments';
 import {
   ADSENSE_MCRSPV_TAG,
diff --git a/extensions/amp-ad-network-adsense-impl/0.1/test/test-amp-ad-network-adsense-impl.js b/extensions/amp-ad-network-adsense-impl/0.1/test/test-amp-ad-network-adsense-impl.js
index d483986a01cd..6def32c030b2 100644
--- a/extensions/amp-ad-network-adsense-impl/0.1/test/test-amp-ad-network-adsense-impl.js
+++ b/extensions/amp-ad-network-adsense-impl/0.1/test/test-amp-ad-network-adsense-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Need the following side-effect import because in actual production code,
 // Fast Fetch impls are always loaded via an AmpAd tag, which means AmpAd is
 // always available for them. However, when we test an impl in isolation,
diff --git a/extensions/amp-ad-network-adsense-impl/0.1/test/test-responsive-state.js b/extensions/amp-ad-network-adsense-impl/0.1/test/test-responsive-state.js
index a0525947ec1d..9a34d0cb5b69 100644
--- a/extensions/amp-ad-network-adsense-impl/0.1/test/test-responsive-state.js
+++ b/extensions/amp-ad-network-adsense-impl/0.1/test/test-responsive-state.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   ADSENSE_MCRSPV_TAG,
   ADSENSE_RSPV_ALLOWED_HEIGHT,
diff --git a/extensions/amp-ad-network-adsense-impl/amp-ad-network-adsense-impl-internal.md b/extensions/amp-ad-network-adsense-impl/amp-ad-network-adsense-impl-internal.md
index 6ad0f6abbed8..576ab9d6e01c 100644
--- a/extensions/amp-ad-network-adsense-impl/amp-ad-network-adsense-impl-internal.md
+++ b/extensions/amp-ad-network-adsense-impl/amp-ad-network-adsense-impl-internal.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 ### amp-ad-network-adsense-impl
 
 AdSense implementation of AMP Ad tag which requests early by XHR and
diff --git a/extensions/amp-ad-network-adzerk-impl/0.1/amp-ad-network-adzerk-impl.js b/extensions/amp-ad-network-adzerk-impl/0.1/amp-ad-network-adzerk-impl.js
index a25b389deca1..2fa45218ef9f 100644
--- a/extensions/amp-ad-network-adzerk-impl/0.1/amp-ad-network-adzerk-impl.js
+++ b/extensions/amp-ad-network-adzerk-impl/0.1/amp-ad-network-adzerk-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {tryResolve} from '#core/data-structures/promise';
 import {tryParseJson} from '#core/types/object/json';
 import {utf8Decode, utf8Encode} from '#core/types/string/bytes';
diff --git a/extensions/amp-ad-network-adzerk-impl/0.1/test/test-amp-ad-network-adzerk-impl.js b/extensions/amp-ad-network-adzerk-impl/0.1/test/test-amp-ad-network-adzerk-impl.js
index 81c485025000..1b7c72375a4e 100644
--- a/extensions/amp-ad-network-adzerk-impl/0.1/test/test-amp-ad-network-adzerk-impl.js
+++ b/extensions/amp-ad-network-adzerk-impl/0.1/test/test-amp-ad-network-adzerk-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Need the following side-effect import because in actual production code,
 // Fast Fetch impls are always loaded via an AmpAd tag, which means AmpAd is
 // always available for them. However, when we test an impl in isolation,
diff --git a/extensions/amp-ad-network-dianomi-impl/0.1/amp-ad-network-dianomi-impl.js b/extensions/amp-ad-network-dianomi-impl/0.1/amp-ad-network-dianomi-impl.js
index 87622e8ac5a2..bc5ac0e54926 100644
--- a/extensions/amp-ad-network-dianomi-impl/0.1/amp-ad-network-dianomi-impl.js
+++ b/extensions/amp-ad-network-dianomi-impl/0.1/amp-ad-network-dianomi-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {userAssert} from '../../../src/log';
 import {AmpA4A} from '../../amp-a4a/0.1/amp-a4a';
 
diff --git a/extensions/amp-ad-network-dianomi-impl/0.1/test/test-dianomi-a4a-config.js b/extensions/amp-ad-network-dianomi-impl/0.1/test/test-dianomi-a4a-config.js
index ebd7dbb79923..d7e2c8721447 100644
--- a/extensions/amp-ad-network-dianomi-impl/0.1/test/test-dianomi-a4a-config.js
+++ b/extensions/amp-ad-network-dianomi-impl/0.1/test/test-dianomi-a4a-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // These two are required for reasons internal to AMP
 import '../../../amp-ad/0.1/amp-ad-ui';
 import '../../../amp-ad/0.1/amp-ad-xorigin-iframe-handler';
diff --git a/extensions/amp-ad-network-dianomi-impl/amp-ad-network-dianomi-impl-internal.md b/extensions/amp-ad-network-dianomi-impl/amp-ad-network-dianomi-impl-internal.md
index f82d5631c531..991929d798ff 100644
--- a/extensions/amp-ad-network-dianomi-impl/amp-ad-network-dianomi-impl-internal.md
+++ b/extensions/amp-ad-network-dianomi-impl/amp-ad-network-dianomi-impl-internal.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-ad-network-dianomi-impl
 
 The Dianomi fast fetch implementation for serving AMP ads, using `<amp-ad>`.
diff --git a/extensions/amp-ad-network-doubleclick-impl/0.1/amp-ad-network-doubleclick-impl.js b/extensions/amp-ad-network-doubleclick-impl/0.1/amp-ad-network-doubleclick-impl.js
index 8decf9d83c0e..52995d57002f 100644
--- a/extensions/amp-ad-network-doubleclick-impl/0.1/amp-ad-network-doubleclick-impl.js
+++ b/extensions/amp-ad-network-doubleclick-impl/0.1/amp-ad-network-doubleclick-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Because AdSense and DoubleClick are both operated by Google and their A4A
 // implementations share some behavior in common, part of the logic for this
 // implementation is located in the ads/google/a4a directory rather than here.
diff --git a/extensions/amp-ad-network-doubleclick-impl/0.1/flexible-ad-slot-utils.js b/extensions/amp-ad-network-doubleclick-impl/0.1/flexible-ad-slot-utils.js
index e3f0f29f2267..9d01e9993ec7 100644
--- a/extensions/amp-ad-network-doubleclick-impl/0.1/flexible-ad-slot-utils.js
+++ b/extensions/amp-ad-network-doubleclick-impl/0.1/flexible-ad-slot-utils.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Layout} from '#core/dom/layout';
 
 import {Services} from '#service';
diff --git a/extensions/amp-ad-network-doubleclick-impl/0.1/safeframe-host.js b/extensions/amp-ad-network-doubleclick-impl/0.1/safeframe-host.js
index a67c4974469b..8a0743e0cb60 100644
--- a/extensions/amp-ad-network-doubleclick-impl/0.1/safeframe-host.js
+++ b/extensions/amp-ad-network-doubleclick-impl/0.1/safeframe-host.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getPageLayoutBoxBlocking} from '#core/dom/layout/page-layout-box';
 import {getStyle, setStyles} from '#core/dom/style';
 import {throttle} from '#core/types/function';
diff --git a/extensions/amp-ad-network-doubleclick-impl/0.1/sra-utils.js b/extensions/amp-ad-network-doubleclick-impl/0.1/sra-utils.js
index 0ecfcb7e3cd4..b3bd0e27dbdd 100644
--- a/extensions/amp-ad-network-doubleclick-impl/0.1/sra-utils.js
+++ b/extensions/amp-ad-network-doubleclick-impl/0.1/sra-utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isInManualExperiment} from '#ads/google/a4a/traffic-experiments';
 import {getEnclosingContainerTypes} from '#ads/google/a4a/utils';
 
diff --git a/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-amp-ad-network-doubleclick-impl.js b/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-amp-ad-network-doubleclick-impl.js
index 6697d5128680..7de4c8ee20f1 100644
--- a/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-amp-ad-network-doubleclick-impl.js
+++ b/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-amp-ad-network-doubleclick-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Need the following side-effect import because in actual production code,
 // Fast Fetch impls are always loaded via an AmpAd tag, which means AmpAd is
 // always available for them. However, when we test an impl in isolation,
diff --git a/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-doubleclick-fluid.js b/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-doubleclick-fluid.js
index 4b7c7ed8ce59..bbd1f3169fa8 100644
--- a/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-doubleclick-fluid.js
+++ b/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-doubleclick-fluid.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Need the following side-effect import because in actual production code,
 // Fast Fetch impls are always loaded via an AmpAd tag, which means AmpAd is
 // always available for them. However, when we test an impl in isolation,
diff --git a/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-doubleclick-rtc.js b/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-doubleclick-rtc.js
index 7b1e89fb3441..21398e61e5a4 100644
--- a/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-doubleclick-rtc.js
+++ b/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-doubleclick-rtc.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Need the following side-effect import because in actual production code,
 // Fast Fetch impls are always loaded via an AmpAd tag, which means AmpAd is
 // always available for them. However, when we test an impl in isolation,
diff --git a/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-doubleclick-safeframe.js b/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-doubleclick-safeframe.js
index d898bfe0f808..8099fb9ade52 100644
--- a/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-doubleclick-safeframe.js
+++ b/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-doubleclick-safeframe.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Need the following side-effect import because in actual production code,
 // Fast Fetch impls are always loaded via an AmpAd tag, which means AmpAd is
 // always available for them. However, when we test an impl in isolation,
diff --git a/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-doubleclick-sra.js b/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-doubleclick-sra.js
index 57641ca2c96b..9c7ab0eb1ca5 100644
--- a/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-doubleclick-sra.js
+++ b/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-doubleclick-sra.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import '../../../amp-ad/0.1/amp-ad';
 import {MANUAL_EXPERIMENT_ID} from '#ads/google/a4a/traffic-experiments';
 import {EXPERIMENT_ATTRIBUTE} from '#ads/google/a4a/utils';
diff --git a/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-flexible-ad-slot-utils.js b/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-flexible-ad-slot-utils.js
index be322a198edd..cc4a36ebdf89 100644
--- a/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-flexible-ad-slot-utils.js
+++ b/extensions/amp-ad-network-doubleclick-impl/0.1/test/test-flexible-ad-slot-utils.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {createElementWithAttributes} from '#core/dom';
 
 import {Services} from '#service';
diff --git a/extensions/amp-ad-network-doubleclick-impl/always-serve-npa.md b/extensions/amp-ad-network-doubleclick-impl/always-serve-npa.md
index dc57407c46f9..8df4e67a1bb6 100644
--- a/extensions/amp-ad-network-doubleclick-impl/always-serve-npa.md
+++ b/extensions/amp-ad-network-doubleclick-impl/always-serve-npa.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Always Serve NPA
 
 `always-serve-npa` provides a way to utilize the `<amp-geo>` component to detect user's geo location to decide if a non-personalized ad should be requested, regardless of the [user's consent decision](amp-consent.md). The value of `always-serve-npa` should be a comma delimited string of geo group codes which are defined in `<amp-geo>` (details [here](https://github.com/ampproject/amphtml/blob/main/extensions/amp-geo/amp-geo.md)). If no value is found or an empty string is provided, then a NPA will always be requested, regardless of the location.
diff --git a/extensions/amp-ad-network-doubleclick-impl/amp-ad-network-doubleclick-impl-internal.md b/extensions/amp-ad-network-doubleclick-impl/amp-ad-network-doubleclick-impl-internal.md
index 101e7e762338..8b1c6bb6328a 100644
--- a/extensions/amp-ad-network-doubleclick-impl/amp-ad-network-doubleclick-impl-internal.md
+++ b/extensions/amp-ad-network-doubleclick-impl/amp-ad-network-doubleclick-impl-internal.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Google Ad Manager
 
 ### <a name="amp-ad-network-doubleclick-impl"></a> `amp-ad-network-doubleclick-impl`
diff --git a/extensions/amp-ad-network-doubleclick-impl/amp-consent.md b/extensions/amp-ad-network-doubleclick-impl/amp-consent.md
index c0475f9e77c2..ec9acb269bb7 100644
--- a/extensions/amp-ad-network-doubleclick-impl/amp-consent.md
+++ b/extensions/amp-ad-network-doubleclick-impl/amp-consent.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP Consent integration
 
 The `<amp-consent>` element can be used to block the ad request and any [RTC](./doubleclick-rtc.md) requests from being sent until the user or AMP consent [checkConsentHref](https://github.com/ampproject/amphtml/blob/main/extensions/amp-consent/amp-consent.md#consent-configuration) end point provide consent state. After the amp-consent extension has been configured (please refer to its [documentation](https://github.com/ampproject/amphtml/blob/main/extensions/amp-consent/amp-consent.md)), it can be linked to the amp-ad element via the `data-block-on-consent` attribute.
diff --git a/extensions/amp-ad-network-doubleclick-impl/fluid.md b/extensions/amp-ad-network-doubleclick-impl/fluid.md
index 06adc9d8909f..6b2cbfbb7fe1 100644
--- a/extensions/amp-ad-network-doubleclick-impl/fluid.md
+++ b/extensions/amp-ad-network-doubleclick-impl/fluid.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Fluid
 
 A fluid ad slot does not require a publisher to specify its size. Instead, the publisher may simply declare an ad slot with the attributes `layout="fluid" height="fluid"`, and a creative of indeterminate size will be returned. The actual size of the slot will be determined by the given creative at render time. It will always occupy the maximum available width, and its height will be determined relative to that width. One benefit of this feature is that, like multi-size, it increases monetization potential by increasing the available pool of creatives that may be rendered in a particular slot. Moreover, this feature relieves the publisher of having to worry about determining what size a slot should use.
diff --git a/extensions/amp-ad-network-doubleclick-impl/lazy-fetch.md b/extensions/amp-ad-network-doubleclick-impl/lazy-fetch.md
index 73ff72a2045a..4ef12c084021 100644
--- a/extensions/amp-ad-network-doubleclick-impl/lazy-fetch.md
+++ b/extensions/amp-ad-network-doubleclick-impl/lazy-fetch.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP Ad Lazy Fetch
 
 By default, Doubeclick type AMP Ad fetches all slots on the page independent of their location relative to the viewport. However when they render is dependent on <a href="render-on-idle.md">Render on Idle</a>. If a publisher is seeking to delay the ad request instead of just render, data-lazy-fetch=true attribute can be set on the amp-ad element:
diff --git a/extensions/amp-ad-network-doubleclick-impl/multi-size.md b/extensions/amp-ad-network-doubleclick-impl/multi-size.md
index 32ccecf66d41..00948a669d09 100644
--- a/extensions/amp-ad-network-doubleclick-impl/multi-size.md
+++ b/extensions/amp-ad-network-doubleclick-impl/multi-size.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Multi-size Ad
 
 To request an ad with multiple sizes, pass a string of comma-separated sizes to
diff --git a/extensions/amp-ad-network-doubleclick-impl/refresh.md b/extensions/amp-ad-network-doubleclick-impl/refresh.md
index 1eae7606ae31..e4a1f12bae18 100644
--- a/extensions/amp-ad-network-doubleclick-impl/refresh.md
+++ b/extensions/amp-ad-network-doubleclick-impl/refresh.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP Ad Refresh
 
 AMP Ad Refresh provides a mechanism for Google Ad Manager slots to periodically refresh, that is to fetch and render a new creative. Slots will only issue refresh requests once the current creative has been viewed (i.e., has had 50% of its pixels on screen for a continuous second).
diff --git a/extensions/amp-ad-network-doubleclick-impl/render-on-idle.md b/extensions/amp-ad-network-doubleclick-impl/render-on-idle.md
index b30a5c9614f3..e6288ca06a49 100644
--- a/extensions/amp-ad-network-doubleclick-impl/render-on-idle.md
+++ b/extensions/amp-ad-network-doubleclick-impl/render-on-idle.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Render On Idle
 
 Slots not marked with data-loading-strategy attribute that are more than 3 viewports but less than 12 from current location are allowed to render when the AMP scheduler
diff --git a/extensions/amp-ad-network-doubleclick-impl/single-page-ad.md b/extensions/amp-ad-network-doubleclick-impl/single-page-ad.md
index 4d35ce64c988..8f6f183c31ef 100644
--- a/extensions/amp-ad-network-doubleclick-impl/single-page-ad.md
+++ b/extensions/amp-ad-network-doubleclick-impl/single-page-ad.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Single Page Ads
 
 A single page ad allows an ad creative to appear as a full page, dynamically interleaved, within the pages of an AMP story. For more information about AMP stories, see [here](https://github.com/ampproject/amphtml/blob/main/extensions/amp-story/amp-story-ads.md).
diff --git a/extensions/amp-ad-network-doubleclick-impl/sra.md b/extensions/amp-ad-network-doubleclick-impl/sra.md
index 334a70bc765e..6c7a2a33f49c 100644
--- a/extensions/amp-ad-network-doubleclick-impl/sra.md
+++ b/extensions/amp-ad-network-doubleclick-impl/sra.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # SRA: Single Request Architecture
 
 Enabling SRA allows a publisher to make a single request for all ad slots on the AMP page which gives a publisher the ability to do roadblocking and competitive exclusions. This very similar to the behavior achieved on non-AMP pages when using [this](https://developers.google.com/doubleclick-gpt/reference#googletag.PubAdsService_enableSingleRequest) method in GPT.
diff --git a/extensions/amp-ad-network-fake-impl/0.1/amp-ad-metadata-transformer.js b/extensions/amp-ad-network-fake-impl/0.1/amp-ad-metadata-transformer.js
index 3c6bc487a3e1..5b5d4699059e 100644
--- a/extensions/amp-ad-network-fake-impl/0.1/amp-ad-metadata-transformer.js
+++ b/extensions/amp-ad-network-fake-impl/0.1/amp-ad-metadata-transformer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 import {parseJson} from '#core/types/object/json';
 
diff --git a/extensions/amp-ad-network-fake-impl/0.1/amp-ad-network-fake-impl.js b/extensions/amp-ad-network-fake-impl/0.1/amp-ad-network-fake-impl.js
index a04f8583284f..423b0fc84354 100644
--- a/extensions/amp-ad-network-fake-impl/0.1/amp-ad-network-fake-impl.js
+++ b/extensions/amp-ad-network-fake-impl/0.1/amp-ad-network-fake-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {includes} from '#core/types/string';
 
 import {forceExperimentBranch} from '#experiments';
diff --git a/extensions/amp-ad-network-fake-impl/0.1/external-reorder-head-transformer.js b/extensions/amp-ad-network-fake-impl/0.1/external-reorder-head-transformer.js
index 17ccf045bfdb..1d1abdf353b8 100644
--- a/extensions/amp-ad-network-fake-impl/0.1/external-reorder-head-transformer.js
+++ b/extensions/amp-ad-network-fake-impl/0.1/external-reorder-head-transformer.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {endsWith} from '#core/types/string';
 
 import {urls} from '../../../src/config';
diff --git a/extensions/amp-ad-network-fake-impl/0.1/test/test-amp-ad-metadata-transformer.js b/extensions/amp-ad-network-fake-impl/0.1/test/test-amp-ad-metadata-transformer.js
index 9b2be80865fc..909c93db19f0 100644
--- a/extensions/amp-ad-network-fake-impl/0.1/test/test-amp-ad-metadata-transformer.js
+++ b/extensions/amp-ad-network-fake-impl/0.1/test/test-amp-ad-metadata-transformer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpAdMetadataTransformer} from '../amp-ad-metadata-transformer';
 
 const ampRuntimeScript = `<script async src=https://cdn.ampproject.org/amp4ads-v0.js></script>`;
diff --git a/extensions/amp-ad-network-fake-impl/0.1/test/test-amp-ad-network-fake-impl.js b/extensions/amp-ad-network-fake-impl/0.1/test/test-amp-ad-network-fake-impl.js
index 5feafa60071e..0f5eaee2dd5d 100644
--- a/extensions/amp-ad-network-fake-impl/0.1/test/test-amp-ad-network-fake-impl.js
+++ b/extensions/amp-ad-network-fake-impl/0.1/test/test-amp-ad-network-fake-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpAd} from '../../../amp-ad/0.1/amp-ad'; // eslint-disable-line no-unused-vars
 import {AmpAdNetworkFakeImpl} from '../amp-ad-network-fake-impl';
 
diff --git a/extensions/amp-ad-network-fake-impl/0.1/test/test-external-reorder-head-transformer.js b/extensions/amp-ad-network-fake-impl/0.1/test/test-external-reorder-head-transformer.js
index be37b8cb21d4..fc05eb7a9c9c 100644
--- a/extensions/amp-ad-network-fake-impl/0.1/test/test-external-reorder-head-transformer.js
+++ b/extensions/amp-ad-network-fake-impl/0.1/test/test-external-reorder-head-transformer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ExternalReorderHeadTransformer} from '../external-reorder-head-transformer';
 
 const title = `<title>Hello, world.</title>`;
diff --git a/extensions/amp-ad-network-fake-impl/amp-ad-network-fake-impl-internal.md b/extensions/amp-ad-network-fake-impl/amp-ad-network-fake-impl-internal.md
index 2d57178403bf..28f4846646b9 100644
--- a/extensions/amp-ad-network-fake-impl/amp-ad-network-fake-impl-internal.md
+++ b/extensions/amp-ad-network-fake-impl/amp-ad-network-fake-impl-internal.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # <a name="amp-ad-network-fake-impl"></a> `amp-ad-network-fake-impl`
 
 <table>
diff --git a/extensions/amp-ad-network-nws-impl/0.1/amp-ad-network-nws-impl.js b/extensions/amp-ad-network-nws-impl/0.1/amp-ad-network-nws-impl.js
index 5ac28ac52173..49789c97f00e 100644
--- a/extensions/amp-ad-network-nws-impl/0.1/amp-ad-network-nws-impl.js
+++ b/extensions/amp-ad-network-nws-impl/0.1/amp-ad-network-nws-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeElement} from '#core/dom';
 import {parseJson} from '#core/types/object/json';
 
diff --git a/extensions/amp-ad-network-nws-impl/0.1/test/test-nws-a4a-config.js b/extensions/amp-ad-network-nws-impl/0.1/test/test-nws-a4a-config.js
index 3381755f55f8..c2c1c2784ab9 100644
--- a/extensions/amp-ad-network-nws-impl/0.1/test/test-nws-a4a-config.js
+++ b/extensions/amp-ad-network-nws-impl/0.1/test/test-nws-a4a-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // These two are required for reasons internal to AMP
 import '../../../amp-ad/0.1/amp-ad-ui';
 import '../../../amp-ad/0.1/amp-ad-xorigin-iframe-handler';
diff --git a/extensions/amp-ad-network-nws-impl/amp-ad-network-nws-impl-internal.md b/extensions/amp-ad-network-nws-impl/amp-ad-network-nws-impl-internal.md
index c1861697592c..acf0d33e55a3 100644
--- a/extensions/amp-ad-network-nws-impl/amp-ad-network-nws-impl-internal.md
+++ b/extensions/amp-ad-network-nws-impl/amp-ad-network-nws-impl-internal.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-ad-network-nws-impl
 
 Newsroom AI fast fetch implementation for serving AMP story ads via `<amp-story-auto-ads>`:
diff --git a/extensions/amp-ad-network-oblivki-impl/0.1/amp-ad-network-oblivki-impl.js b/extensions/amp-ad-network-oblivki-impl/0.1/amp-ad-network-oblivki-impl.js
index 33c0a5649a68..4af5f19ea95d 100644
--- a/extensions/amp-ad-network-oblivki-impl/0.1/amp-ad-network-oblivki-impl.js
+++ b/extensions/amp-ad-network-oblivki-impl/0.1/amp-ad-network-oblivki-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpA4A} from '../../amp-a4a/0.1/amp-a4a';
 
 /**
diff --git a/extensions/amp-ad-network-oblivki-impl/0.1/oblivki-a4a-config.js b/extensions/amp-ad-network-oblivki-impl/0.1/oblivki-a4a-config.js
index b12c83ae6884..ece49bbabd6e 100644
--- a/extensions/amp-ad-network-oblivki-impl/0.1/oblivki-a4a-config.js
+++ b/extensions/amp-ad-network-oblivki-impl/0.1/oblivki-a4a-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @const @private {string} */
 const OBLIVKI_SRC_PREFIX_ = 'https://oblivki.biz/amp/';
 
diff --git a/extensions/amp-ad-network-oblivki-impl/0.1/test/test-amp-ad-network-oblivki-impl.js b/extensions/amp-ad-network-oblivki-impl/0.1/test/test-amp-ad-network-oblivki-impl.js
index ea4a013ecd52..260d5dc3e584 100644
--- a/extensions/amp-ad-network-oblivki-impl/0.1/test/test-amp-ad-network-oblivki-impl.js
+++ b/extensions/amp-ad-network-oblivki-impl/0.1/test/test-amp-ad-network-oblivki-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes} from '#core/dom';
 
 import {
diff --git a/extensions/amp-ad-network-oblivki-impl/amp-ad-network-oblivki-impl.md b/extensions/amp-ad-network-oblivki-impl/amp-ad-network-oblivki-impl.md
index 613ae5a62755..bcfefcbbfdf5 100644
--- a/extensions/amp-ad-network-oblivki-impl/amp-ad-network-oblivki-impl.md
+++ b/extensions/amp-ad-network-oblivki-impl/amp-ad-network-oblivki-impl.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-ad-network-oblivki-impl
 
 Oblivki implementation of AMP Ad tag which requests early by XHR and renders natively within the page if a valid AMP Ad is returned. Should not be directly referenced by pages and instead is dynamically loaded via the amp-ad tag. However, in order to remove an async script load of this library, publishers can include its script declaration.
diff --git a/extensions/amp-ad-network-smartads-impl/0.1/amp-ad-network-smartads-impl.js b/extensions/amp-ad-network-smartads-impl/0.1/amp-ad-network-smartads-impl.js
index f0ae041cbd3f..744e24c02a05 100644
--- a/extensions/amp-ad-network-smartads-impl/0.1/amp-ad-network-smartads-impl.js
+++ b/extensions/amp-ad-network-smartads-impl/0.1/amp-ad-network-smartads-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpA4A} from '../../amp-a4a/0.1/amp-a4a';
 
 /**
diff --git a/extensions/amp-ad-network-smartads-impl/0.1/smartads-a4a-config.js b/extensions/amp-ad-network-smartads-impl/0.1/smartads-a4a-config.js
index e3128952759e..a07758a2414c 100644
--- a/extensions/amp-ad-network-smartads-impl/0.1/smartads-a4a-config.js
+++ b/extensions/amp-ad-network-smartads-impl/0.1/smartads-a4a-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @const @private {string} */
 const SRC_PREFIX_ = 'https://smart-ads.biz/_amp';
 
diff --git a/extensions/amp-ad-network-smartads-impl/0.1/test/test-amp-ad-network-smartads-impl.js b/extensions/amp-ad-network-smartads-impl/0.1/test/test-amp-ad-network-smartads-impl.js
index fea1cb476ca2..1f7b9a9304a4 100644
--- a/extensions/amp-ad-network-smartads-impl/0.1/test/test-amp-ad-network-smartads-impl.js
+++ b/extensions/amp-ad-network-smartads-impl/0.1/test/test-amp-ad-network-smartads-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes} from '#core/dom';
 
 import {
diff --git a/extensions/amp-ad-network-smartads-impl/amp-ad-network-smartads-impl.md b/extensions/amp-ad-network-smartads-impl/amp-ad-network-smartads-impl.md
index 640478bbe09e..95cd32d50e0f 100644
--- a/extensions/amp-ad-network-smartads-impl/amp-ad-network-smartads-impl.md
+++ b/extensions/amp-ad-network-smartads-impl/amp-ad-network-smartads-impl.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-ad-network-smartads-impl
 
 SmartAds implementation of AMP Ad tag which requests early by XHR and renders natively within the page if a valid AMP Ad is returned. Should not be directly referenced by pages and instead is dynamically loaded via the amp-ad tag. However, in order to remove an async script load of this library, publishers can include its script declaration.
diff --git a/extensions/amp-ad-network-triplelift-impl/amp-ad-network-triplelift-impl-internal.md b/extensions/amp-ad-network-triplelift-impl/amp-ad-network-triplelift-impl-internal.md
index 469f1f98ea2c..e41fd705289b 100644
--- a/extensions/amp-ad-network-triplelift-impl/amp-ad-network-triplelift-impl-internal.md
+++ b/extensions/amp-ad-network-triplelift-impl/amp-ad-network-triplelift-impl-internal.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-ad-network-triplelift-impl
 
 TripleLift implementation of AMP Ad tag which requests early by XHR and renders natively within the page if a valid AMP Ad is returned. Should not be directly referenced by pages and instead is dynamically loaded via the amp-ad tag. However, in order to remove an async script load of this library, publishers can include its script declaration.
diff --git a/extensions/amp-ad-network-valueimpression-impl/0.1/amp-ad-network-valueimpression-impl.js b/extensions/amp-ad-network-valueimpression-impl/0.1/amp-ad-network-valueimpression-impl.js
index 1c9a46c0bb90..a31eb0dc0875 100644
--- a/extensions/amp-ad-network-valueimpression-impl/0.1/amp-ad-network-valueimpression-impl.js
+++ b/extensions/amp-ad-network-valueimpression-impl/0.1/amp-ad-network-valueimpression-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '#service/real-time-config/real-time-config-impl';
 import {Deferred} from '#core/data-structures/promise';
 import {domFingerprintPlain} from '#core/dom/fingerprint';
diff --git a/extensions/amp-ad-network-valueimpression-impl/0.1/flexible-ad-slot-utils.js b/extensions/amp-ad-network-valueimpression-impl/0.1/flexible-ad-slot-utils.js
index b93fc054db9f..9d01e9993ec7 100644
--- a/extensions/amp-ad-network-valueimpression-impl/0.1/flexible-ad-slot-utils.js
+++ b/extensions/amp-ad-network-valueimpression-impl/0.1/flexible-ad-slot-utils.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Layout} from '#core/dom/layout';
 
 import {Services} from '#service';
diff --git a/extensions/amp-ad-network-valueimpression-impl/0.1/test/test-amp-ad-network-valueimpression-impl.js b/extensions/amp-ad-network-valueimpression-impl/0.1/test/test-amp-ad-network-valueimpression-impl.js
index 1109ba9cda99..ad89c21916f0 100644
--- a/extensions/amp-ad-network-valueimpression-impl/0.1/test/test-amp-ad-network-valueimpression-impl.js
+++ b/extensions/amp-ad-network-valueimpression-impl/0.1/test/test-amp-ad-network-valueimpression-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Need the following side-effect import because in actual production code,
 // Fast Fetch impls are always loaded via an AmpAd tag, which means AmpAd is
 // always available for them. However, when we test an impl in isolation,
diff --git a/extensions/amp-ad-network-valueimpression-impl/0.1/test/test-flexible-ad-slot-utils.js b/extensions/amp-ad-network-valueimpression-impl/0.1/test/test-flexible-ad-slot-utils.js
index eaf7477279f5..ca629f7bdf48 100644
--- a/extensions/amp-ad-network-valueimpression-impl/0.1/test/test-flexible-ad-slot-utils.js
+++ b/extensions/amp-ad-network-valueimpression-impl/0.1/test/test-flexible-ad-slot-utils.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {createElementWithAttributes} from '#core/dom';
 
 import {Services} from '#service';
diff --git a/extensions/amp-ad-network-valueimpression-impl/amp-ad-network-valueimpression-impl-internal.md b/extensions/amp-ad-network-valueimpression-impl/amp-ad-network-valueimpression-impl-internal.md
index 7542b350250b..528c98458020 100644
--- a/extensions/amp-ad-network-valueimpression-impl/amp-ad-network-valueimpression-impl-internal.md
+++ b/extensions/amp-ad-network-valueimpression-impl/amp-ad-network-valueimpression-impl-internal.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-ad-network-valueimpression-impl
 
 ValueImpression implementation of AMP Ad tag which requests early by XHR and renders natively within the page if a valid AMP Ad is returned. Should not be directly referenced by pages and instead is dynamically loaded via the amp-ad tag. However, in order to remove an async script load of this library, publishers can include its script declaration.
diff --git a/extensions/amp-ad/0.1/amp-ad-3p-impl.js b/extensions/amp-ad/0.1/amp-ad-3p-impl.js
index fc6d2e6d9f00..1c4c0ccf7178 100644
--- a/extensions/amp-ad/0.1/amp-ad-3p-impl.js
+++ b/extensions/amp-ad/0.1/amp-ad-3p-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   ADSENSE_MCRSPV_TAG,
   getMatchedContentResponsiveHeightAndUpdatePubParams,
diff --git a/extensions/amp-ad/0.1/amp-ad-custom.js b/extensions/amp-ad/0.1/amp-ad-custom.js
index 30b6518ee85d..e75a4124d337 100644
--- a/extensions/amp-ad/0.1/amp-ad-custom.js
+++ b/extensions/amp-ad/0.1/amp-ad-custom.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpAdUIHandler} from './amp-ad-ui';
 import {CommonSignals} from '#core/constants/common-signals';
 import {LayoutPriority, isLayoutSizeDefined} from '#core/dom/layout';
diff --git a/extensions/amp-ad/0.1/amp-ad-ui.js b/extensions/amp-ad/0.1/amp-ad-ui.js
index 273db446789f..d2e20db57737 100644
--- a/extensions/amp-ad/0.1/amp-ad-ui.js
+++ b/extensions/amp-ad/0.1/amp-ad-ui.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {ancestorElementsByTag} from '#core/dom/query';
 import {createElementWithAttributes, removeElement} from '#core/dom';
diff --git a/extensions/amp-ad/0.1/amp-ad-xorigin-iframe-handler.js b/extensions/amp-ad/0.1/amp-ad-xorigin-iframe-handler.js
index fd9ae6b42b13..d781f4a54757 100644
--- a/extensions/amp-ad/0.1/amp-ad-xorigin-iframe-handler.js
+++ b/extensions/amp-ad/0.1/amp-ad-xorigin-iframe-handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CONSTANTS, MessageType} from '#core/3p-frame-messaging';
 import {CommonSignals} from '#core/constants/common-signals';
 import {Deferred} from '#core/data-structures/promise';
diff --git a/extensions/amp-ad/0.1/amp-ad.css b/extensions/amp-ad/0.1/amp-ad.css
index cd9dd24b1df3..e0d35f023e7d 100644
--- a/extensions/amp-ad/0.1/amp-ad.css
+++ b/extensions/amp-ad/0.1/amp-ad.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /**
  * Force the layout box of the ad iframe to be exactly as big as the actual
diff --git a/extensions/amp-ad/0.1/legacy-ad-intersection-observer-host.js b/extensions/amp-ad/0.1/legacy-ad-intersection-observer-host.js
index 3c649b10f498..9ef4f40a521f 100644
--- a/extensions/amp-ad/0.1/legacy-ad-intersection-observer-host.js
+++ b/extensions/amp-ad/0.1/legacy-ad-intersection-observer-host.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {MessageType} from '#core/3p-frame-messaging';
 import {Services} from '#service';
 import {SubscriptionApi} from '../../../src/iframe-helper';
diff --git a/extensions/amp-ad/0.1/test/test-amp-ad-3p-impl.js b/extensions/amp-ad/0.1/test/test-amp-ad-3p-impl.js
index 1a7ae790a530..167c5229d871 100644
--- a/extensions/amp-ad/0.1/test/test-amp-ad-3p-impl.js
+++ b/extensions/amp-ad/0.1/test/test-amp-ad-3p-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../../../amp-sticky-ad/1.0/amp-sticky-ad';
 import '../amp-ad';
 import * as adCid from '../../../../src/ad-cid';
diff --git a/extensions/amp-ad/0.1/test/test-amp-ad-custom.js b/extensions/amp-ad/0.1/test/test-amp-ad-custom.js
index 9a5fd6e66250..477f9fe28bd1 100644
--- a/extensions/amp-ad/0.1/test/test-amp-ad-custom.js
+++ b/extensions/amp-ad/0.1/test/test-amp-ad-custom.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpAdCustom} from '../amp-ad-custom';
 import {LayoutPriority} from '#core/dom/layout';
 import {Services} from '#service';
diff --git a/extensions/amp-ad/0.1/test/test-amp-ad-ui.js b/extensions/amp-ad/0.1/test/test-amp-ad-ui.js
index da589c5834d9..292d3e83ad59 100644
--- a/extensions/amp-ad/0.1/test/test-amp-ad-ui.js
+++ b/extensions/amp-ad/0.1/test/test-amp-ad-ui.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as adHelper from '../../../../src/ad-helper';
 import * as domQuery from '#core/dom/query';
 import {AmpAdUIHandler} from '../amp-ad-ui';
diff --git a/extensions/amp-ad/0.1/test/test-amp-ad-xorigin-iframe-handler.js b/extensions/amp-ad/0.1/test/test-amp-ad-xorigin-iframe-handler.js
index d85eb9979f5f..efcf72a57e50 100644
--- a/extensions/amp-ad/0.1/test/test-amp-ad-xorigin-iframe-handler.js
+++ b/extensions/amp-ad/0.1/test/test-amp-ad-xorigin-iframe-handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpAdUIHandler} from '../amp-ad-ui';
 import {AmpAdXOriginIframeHandler} from '../amp-ad-xorigin-iframe-handler';
 import {BaseElement} from '../../../../src/base-element';
diff --git a/extensions/amp-ad/0.1/test/test-amp-ad.js b/extensions/amp-ad/0.1/test/test-amp-ad.js
index 1511ca25039e..47cbb2023b9d 100644
--- a/extensions/amp-ad/0.1/test/test-amp-ad.js
+++ b/extensions/amp-ad/0.1/test/test-amp-ad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpAd} from '../amp-ad';
 import {AmpAd3PImpl} from '../amp-ad-3p-impl';
 import {Services} from '#service';
diff --git a/extensions/amp-ad/0.1/test/test-concurrent-load.js b/extensions/amp-ad/0.1/test/test-concurrent-load.js
index 80870513b3a5..88b78ce7cbb1 100644
--- a/extensions/amp-ad/0.1/test/test-concurrent-load.js
+++ b/extensions/amp-ad/0.1/test/test-concurrent-load.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 import {createElementWithAttributes} from '#core/dom';
 import {
diff --git a/extensions/amp-ad/0.1/test/test-legacy-ad-intersection-observer-host.js b/extensions/amp-ad/0.1/test/test-legacy-ad-intersection-observer-host.js
index 75fe899b6733..7f111b4b7a6b 100644
--- a/extensions/amp-ad/0.1/test/test-legacy-ad-intersection-observer-host.js
+++ b/extensions/amp-ad/0.1/test/test-legacy-ad-intersection-observer-host.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BaseElement} from '../../../../src/base-element';
 import {LegacyAdIntersectionObserverHost} from '../legacy-ad-intersection-observer-host';
 import {createAmpElementForTesting} from '../../../../src/custom-element';
diff --git a/extensions/amp-ad/amp-ad.md b/extensions/amp-ad/amp-ad.md
index a719f1b20f3a..f4cd3806bed4 100644
--- a/extensions/amp-ad/amp-ad.md
+++ b/extensions/amp-ad/amp-ad.md
@@ -6,22 +6,6 @@ teaser:
   text: A container to display an ad.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-ad / amp-embed
 
 ## Usage
diff --git a/extensions/amp-addthis/0.1/addthis-utils/classify.js b/extensions/amp-addthis/0.1/addthis-utils/classify.js
index 1363e9d8132d..59fb92db42a5 100644
--- a/extensions/amp-addthis/0.1/addthis-utils/classify.js
+++ b/extensions/amp-addthis/0.1/addthis-utils/classify.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {RE_NONALPHA, RE_WHITESPACE} from '../constants';
 import {getDetailsForMeta} from './meta';
 import {rot13Array} from './rot13';
diff --git a/extensions/amp-addthis/0.1/addthis-utils/cuid.js b/extensions/amp-addthis/0.1/addthis-utils/cuid.js
index 5bb5618d5c3e..8eaa698ad5bc 100644
--- a/extensions/amp-addthis/0.1/addthis-utils/cuid.js
+++ b/extensions/amp-addthis/0.1/addthis-utils/cuid.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 const RE_CUID = /^[0-9a-f]{16}$/;
 const MAX_HEX = 0xffffffff;
 const CUID_SESSION_TIME = Date.now();
diff --git a/extensions/amp-addthis/0.1/addthis-utils/eng.js b/extensions/amp-addthis/0.1/addthis-utils/eng.js
index ccfb09404ee0..21bef0fac9ab 100644
--- a/extensions/amp-addthis/0.1/addthis-utils/eng.js
+++ b/extensions/amp-addthis/0.1/addthis-utils/eng.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {API_SERVER} from '../constants';
 import {Services} from '#service';
 
diff --git a/extensions/amp-addthis/0.1/addthis-utils/fragment.js b/extensions/amp-addthis/0.1/addthis-utils/fragment.js
index 6b4e534b525a..9fa912dc0f4d 100644
--- a/extensions/amp-addthis/0.1/addthis-utils/fragment.js
+++ b/extensions/amp-addthis/0.1/addthis-utils/fragment.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {isValidCUID} from './cuid';
 
 const RE_ADDTHIS_FRAGMENT = /^\.[a-z0-9\-_]{11}(\.[a-z0-9_]+)?$/i;
diff --git a/extensions/amp-addthis/0.1/addthis-utils/get-widget-id-overloaded-with-json-for-anonymous-mode.js b/extensions/amp-addthis/0.1/addthis-utils/get-widget-id-overloaded-with-json-for-anonymous-mode.js
index 95aef1c601ae..96cfc93be09a 100644
--- a/extensions/amp-addthis/0.1/addthis-utils/get-widget-id-overloaded-with-json-for-anonymous-mode.js
+++ b/extensions/amp-addthis/0.1/addthis-utils/get-widget-id-overloaded-with-json-for-anonymous-mode.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {dict} from '#core/types/object';
 
 const overrideKeys = [
diff --git a/extensions/amp-addthis/0.1/addthis-utils/lojson.js b/extensions/amp-addthis/0.1/addthis-utils/lojson.js
index 1d7cba835102..d2970275027f 100644
--- a/extensions/amp-addthis/0.1/addthis-utils/lojson.js
+++ b/extensions/amp-addthis/0.1/addthis-utils/lojson.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {API_SERVER} from '../constants';
 import {callPixelEndpoint} from './pixel';
 
diff --git a/extensions/amp-addthis/0.1/addthis-utils/meta.js b/extensions/amp-addthis/0.1/addthis-utils/meta.js
index 6a9cf39b6873..3f3874ff6423 100644
--- a/extensions/amp-addthis/0.1/addthis-utils/meta.js
+++ b/extensions/amp-addthis/0.1/addthis-utils/meta.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Returns a NodeList of Meta Elements (not an Array)
  * @param {Document} doc
diff --git a/extensions/amp-addthis/0.1/addthis-utils/mode.js b/extensions/amp-addthis/0.1/addthis-utils/mode.js
index 3d0a753d4c18..3c69dd2b25e5 100644
--- a/extensions/amp-addthis/0.1/addthis-utils/mode.js
+++ b/extensions/amp-addthis/0.1/addthis-utils/mode.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Expects an object with pubId, widgetId, & productCode keys with string values
  *
diff --git a/extensions/amp-addthis/0.1/addthis-utils/monitors/active-tools-monitor.js b/extensions/amp-addthis/0.1/addthis-utils/monitors/active-tools-monitor.js
index 3120895ff06c..8674c4f2ba13 100644
--- a/extensions/amp-addthis/0.1/addthis-utils/monitors/active-tools-monitor.js
+++ b/extensions/amp-addthis/0.1/addthis-utils/monitors/active-tools-monitor.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {RE_ALPHA} from '../../constants';
 
 const RE_NUMDASH = /[0-9\-].*/;
diff --git a/extensions/amp-addthis/0.1/addthis-utils/monitors/click-monitor.js b/extensions/amp-addthis/0.1/addthis-utils/monitors/click-monitor.js
index 54711e3872ab..47b7109eeee0 100644
--- a/extensions/amp-addthis/0.1/addthis-utils/monitors/click-monitor.js
+++ b/extensions/amp-addthis/0.1/addthis-utils/monitors/click-monitor.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {listen} from '../../../../../src/event-helper';
 
 export class ClickMonitor {
diff --git a/extensions/amp-addthis/0.1/addthis-utils/monitors/dwell-monitor.js b/extensions/amp-addthis/0.1/addthis-utils/monitors/dwell-monitor.js
index 3210ca3ce875..bf2c2d58466e 100644
--- a/extensions/amp-addthis/0.1/addthis-utils/monitors/dwell-monitor.js
+++ b/extensions/amp-addthis/0.1/addthis-utils/monitors/dwell-monitor.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 export class DwellMonitor {
   /**
    * Creates an instance of DwellMonitor.
diff --git a/extensions/amp-addthis/0.1/addthis-utils/monitors/scroll-monitor.js b/extensions/amp-addthis/0.1/addthis-utils/monitors/scroll-monitor.js
index a3b127e47bab..c823cc6ab2ca 100644
--- a/extensions/amp-addthis/0.1/addthis-utils/monitors/scroll-monitor.js
+++ b/extensions/amp-addthis/0.1/addthis-utils/monitors/scroll-monitor.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 export class ScrollMonitor {
diff --git a/extensions/amp-addthis/0.1/addthis-utils/pixel.js b/extensions/amp-addthis/0.1/addthis-utils/pixel.js
index 5355cfc59ca1..571f7d3779ef 100644
--- a/extensions/amp-addthis/0.1/addthis-utils/pixel.js
+++ b/extensions/amp-addthis/0.1/addthis-utils/pixel.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {COOKIELESS_API_SERVER} from '../constants';
 import {Services} from '#service';
 import {addParamsToUrl, parseUrlDeprecated} from '../../../../src/url';
diff --git a/extensions/amp-addthis/0.1/addthis-utils/pjson.js b/extensions/amp-addthis/0.1/addthis-utils/pjson.js
index c28422be0e7b..ca09de8704f8 100644
--- a/extensions/amp-addthis/0.1/addthis-utils/pjson.js
+++ b/extensions/amp-addthis/0.1/addthis-utils/pjson.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {API_SERVER} from '../constants';
 import {callPixelEndpoint} from './pixel';
 
diff --git a/extensions/amp-addthis/0.1/addthis-utils/rot13.js b/extensions/amp-addthis/0.1/addthis-utils/rot13.js
index a3c20efef790..b50055daa281 100644
--- a/extensions/amp-addthis/0.1/addthis-utils/rot13.js
+++ b/extensions/amp-addthis/0.1/addthis-utils/rot13.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {RE_ALPHA} from '../constants';
 
 const CHAR_Z_LOWER = 122;
diff --git a/extensions/amp-addthis/0.1/addthis-utils/session.js b/extensions/amp-addthis/0.1/addthis-utils/session.js
index 68869056733d..f4d4e7c13c98 100644
--- a/extensions/amp-addthis/0.1/addthis-utils/session.js
+++ b/extensions/amp-addthis/0.1/addthis-utils/session.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {createCUID} from './cuid';
 
 const sessionId = createCUID();
diff --git a/extensions/amp-addthis/0.1/amp-addthis.css b/extensions/amp-addthis/0.1/amp-addthis.css
index 2c746a6b318c..55b19676dec6 100644
--- a/extensions/amp-addthis/0.1/amp-addthis.css
+++ b/extensions/amp-addthis/0.1/amp-addthis.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 
 /**
diff --git a/extensions/amp-addthis/0.1/amp-addthis.js b/extensions/amp-addthis/0.1/amp-addthis.js
index 28d3cd4851c5..afb67d6defdd 100644
--- a/extensions/amp-addthis/0.1/amp-addthis.js
+++ b/extensions/amp-addthis/0.1/amp-addthis.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Embeds an AddThis widget.
  * The data-pub-id and data-widget-id can be found easily in the AddThis
diff --git a/extensions/amp-addthis/0.1/config-manager.js b/extensions/amp-addthis/0.1/config-manager.js
index c1ca6e5fb1f8..8bfd84961792 100644
--- a/extensions/amp-addthis/0.1/config-manager.js
+++ b/extensions/amp-addthis/0.1/config-manager.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {CONFIGURATION_EVENT, ORIGIN} from './constants';
 import {getAddThisMode} from './addthis-utils/mode';
 
diff --git a/extensions/amp-addthis/0.1/constants.js b/extensions/amp-addthis/0.1/constants.js
index bc67580b5b80..0c132c224a6b 100644
--- a/extensions/amp-addthis/0.1/constants.js
+++ b/extensions/amp-addthis/0.1/constants.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 export const CONFIGURATION_EVENT = 'addthis.amp.configuration';
 export const SHARE_EVENT = 'addthis.share';
 export const ORIGIN = 'https://s7.addthis.com';
diff --git a/extensions/amp-addthis/0.1/post-message-dispatcher.js b/extensions/amp-addthis/0.1/post-message-dispatcher.js
index f849a6aa4ca6..25485bb15e00 100644
--- a/extensions/amp-addthis/0.1/post-message-dispatcher.js
+++ b/extensions/amp-addthis/0.1/post-message-dispatcher.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CONFIGURATION_EVENT, ORIGIN, SHARE_EVENT} from './constants';
 import {getData} from '../../../src/event-helper';
 import {isObject} from '#core/types';
diff --git a/extensions/amp-addthis/0.1/test/addthis-utils/test-fragment.js b/extensions/amp-addthis/0.1/test/addthis-utils/test-fragment.js
index 48ffd24a214e..309475d06590 100644
--- a/extensions/amp-addthis/0.1/test/addthis-utils/test-fragment.js
+++ b/extensions/amp-addthis/0.1/test/addthis-utils/test-fragment.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {clearOurFragment} from '../../addthis-utils/fragment';
 
 describes.sandboxed('fragment', {}, () => {
diff --git a/extensions/amp-addthis/0.1/test/addthis-utils/test-rot13.js b/extensions/amp-addthis/0.1/test/addthis-utils/test-rot13.js
index b3d901224dd6..0833a852e5f6 100644
--- a/extensions/amp-addthis/0.1/test/addthis-utils/test-rot13.js
+++ b/extensions/amp-addthis/0.1/test/addthis-utils/test-rot13.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {rot13Array} from '../../addthis-utils/rot13';
 
 describes.sandboxed('rot13', {}, () => {
diff --git a/extensions/amp-addthis/0.1/test/test-amp-addthis.js b/extensions/amp-addthis/0.1/test/test-amp-addthis.js
index 4211ff1dacfa..f450c46c9e32 100644
--- a/extensions/amp-addthis/0.1/test/test-amp-addthis.js
+++ b/extensions/amp-addthis/0.1/test/test-amp-addthis.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ALT_TEXT, CONFIGURATION_EVENT, ICON_SIZE, ORIGIN} from '../constants';
 import {ConfigManager} from '../config-manager';
 
diff --git a/extensions/amp-addthis/amp-addthis.md b/extensions/amp-addthis/amp-addthis.md
index 34b7737eac2b..402a6f88e19f 100644
--- a/extensions/amp-addthis/amp-addthis.md
+++ b/extensions/amp-addthis/amp-addthis.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays AddThis customizable social share buttons.
 ---
 
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-addthis
 
 ## Usage
diff --git a/extensions/amp-analytics/0.1/activity-impl.js b/extensions/amp-analytics/0.1/activity-impl.js
index 2041f5cf4d88..27faa3b51ecf 100644
--- a/extensions/amp-analytics/0.1/activity-impl.js
+++ b/extensions/amp-analytics/0.1/activity-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Provides an ability to collect data about activities the user
  * has performed on the page.
diff --git a/extensions/amp-analytics/0.1/amp-analytics.js b/extensions/amp-analytics/0.1/amp-analytics.js
index c7aab404a0ff..0f5478a2e26f 100644
--- a/extensions/amp-analytics/0.1/amp-analytics.js
+++ b/extensions/amp-analytics/0.1/amp-analytics.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Activity} from './activity-impl';
 import {AnalyticsConfig, mergeObjects} from './config';
 import {AnalyticsEventType} from './events';
diff --git a/extensions/amp-analytics/0.1/analytics-group.js b/extensions/amp-analytics/0.1/analytics-group.js
index 65d67f948256..1e310d967945 100644
--- a/extensions/amp-analytics/0.1/analytics-group.js
+++ b/extensions/amp-analytics/0.1/analytics-group.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ChunkPriority, chunk} from '../../../src/chunk';
 import {Deferred} from '#core/data-structures/promise';
 import {dev, userAssert} from '../../../src/log';
diff --git a/extensions/amp-analytics/0.1/analytics-root.js b/extensions/amp-analytics/0.1/analytics-root.js
index ed351d57a670..2e6f71e4d934 100644
--- a/extensions/amp-analytics/0.1/analytics-root.js
+++ b/extensions/amp-analytics/0.1/analytics-root.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ScrollManager} from './scroll-manager';
 import {Services} from '#service';
 import {
diff --git a/extensions/amp-analytics/0.1/config.js b/extensions/amp-analytics/0.1/config.js
index 6fdf26d06b67..79adeb36c654 100644
--- a/extensions/amp-analytics/0.1/config.js
+++ b/extensions/amp-analytics/0.1/config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {DEFAULT_CONFIG} from './default-config';
 import {Services} from '#service';
 import {assertHttpsUrl} from '../../../src/url';
diff --git a/extensions/amp-analytics/0.1/cookie-reader.js b/extensions/amp-analytics/0.1/cookie-reader.js
index be46e75d9f35..0b2c220c1775 100644
--- a/extensions/amp-analytics/0.1/cookie-reader.js
+++ b/extensions/amp-analytics/0.1/cookie-reader.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getCookie} from '../../../src/cookies';
 import {getMode} from '../../../src/mode';
 import {isInFie} from '../../../src/iframe-helper';
diff --git a/extensions/amp-analytics/0.1/cookie-writer.js b/extensions/amp-analytics/0.1/cookie-writer.js
index 260c64ce32ca..f20e76808fd0 100644
--- a/extensions/amp-analytics/0.1/cookie-writer.js
+++ b/extensions/amp-analytics/0.1/cookie-writer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BASE_CID_MAX_AGE_MILLIS} from '#service/cid-impl';
 import {ChunkPriority, chunk} from '../../../src/chunk';
 import {Deferred} from '#core/data-structures/promise';
diff --git a/extensions/amp-analytics/0.1/crc32.js b/extensions/amp-analytics/0.1/crc32.js
index b6c1d7d63447..f6f219546c6f 100644
--- a/extensions/amp-analytics/0.1/crc32.js
+++ b/extensions/amp-analytics/0.1/crc32.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {utf8Encode} from '#core/types/string/bytes';
 
 /**
diff --git a/extensions/amp-analytics/0.1/default-config.js b/extensions/amp-analytics/0.1/default-config.js
index 5dcc2ad2ed08..f69eb43bd054 100644
--- a/extensions/amp-analytics/0.1/default-config.js
+++ b/extensions/amp-analytics/0.1/default-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {jsonConfiguration} from '#core/types/object/json';
 
 // TODO(zhouyx@: Rename file and object name)
diff --git a/extensions/amp-analytics/0.1/events.js b/extensions/amp-analytics/0.1/events.js
index b07cecec987f..d8728283d650 100644
--- a/extensions/amp-analytics/0.1/events.js
+++ b/extensions/amp-analytics/0.1/events.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CommonSignals} from '#core/constants/common-signals';
 import {Deferred} from '#core/data-structures/promise';
 import {Observable} from '#core/data-structures/observable';
diff --git a/extensions/amp-analytics/0.1/iframe-transport-message-queue.js b/extensions/amp-analytics/0.1/iframe-transport-message-queue.js
index bc2da2086a98..446fd7d0a677 100644
--- a/extensions/amp-analytics/0.1/iframe-transport-message-queue.js
+++ b/extensions/amp-analytics/0.1/iframe-transport-message-queue.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {IframeTransportEventDef, MessageType} from '#core/3p-frame-messaging';
 import {SubscriptionApi} from '../../../src/iframe-helper';
 import {dev, devAssert} from '../../../src/log';
diff --git a/extensions/amp-analytics/0.1/iframe-transport-vendors.js b/extensions/amp-analytics/0.1/iframe-transport-vendors.js
index 1a7967503470..4f0da8b526da 100644
--- a/extensions/amp-analytics/0.1/iframe-transport-vendors.js
+++ b/extensions/amp-analytics/0.1/iframe-transport-vendors.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Vendors who have IAB viewability certification may use iframe transport
  * (see ../amp-analytics.md and ../integrating-analytics.md). In this case,
diff --git a/extensions/amp-analytics/0.1/iframe-transport.js b/extensions/amp-analytics/0.1/iframe-transport.js
index a68a0234be66..8a17b2825fc7 100644
--- a/extensions/amp-analytics/0.1/iframe-transport.js
+++ b/extensions/amp-analytics/0.1/iframe-transport.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {IframeTransportMessageQueue} from './iframe-transport-message-queue';
 import {createElementWithAttributes} from '#core/dom';
 import {devAssert, user} from '../../../src/log';
diff --git a/extensions/amp-analytics/0.1/instrumentation.js b/extensions/amp-analytics/0.1/instrumentation.js
index 015e7ac2d017..c2786d67da3a 100644
--- a/extensions/amp-analytics/0.1/instrumentation.js
+++ b/extensions/amp-analytics/0.1/instrumentation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   AmpStoryEventTracker,
   AnalyticsEvent,
diff --git a/extensions/amp-analytics/0.1/linker-manager.js b/extensions/amp-analytics/0.1/linker-manager.js
index 37952e597013..6a8cea916da3 100644
--- a/extensions/amp-analytics/0.1/linker-manager.js
+++ b/extensions/amp-analytics/0.1/linker-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AMPDOC_SINGLETON_NAME} from '#core/constants/enums';
 import {ExpansionOptions, variableServiceForDoc} from './variables';
 import {Priority} from '#service/navigation';
diff --git a/extensions/amp-analytics/0.1/linker-reader.js b/extensions/amp-analytics/0.1/linker-reader.js
index f25e0485e637..59b9b654f18d 100644
--- a/extensions/amp-analytics/0.1/linker-reader.js
+++ b/extensions/amp-analytics/0.1/linker-reader.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getService, registerServiceBuilder} from '../../../src/service-helpers';
 import {hasOwn} from '#core/types/object';
 import {parseLinker} from './linker';
diff --git a/extensions/amp-analytics/0.1/linker.js b/extensions/amp-analytics/0.1/linker.js
index 0709fd734a14..c6c8970a57b6 100644
--- a/extensions/amp-analytics/0.1/linker.js
+++ b/extensions/amp-analytics/0.1/linker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {WindowInterface} from '#core/window/interface';
 import {
   base64UrlDecodeFromString,
diff --git a/extensions/amp-analytics/0.1/opacity.js b/extensions/amp-analytics/0.1/opacity.js
index fd0e95217bd7..1fc21833a913 100644
--- a/extensions/amp-analytics/0.1/opacity.js
+++ b/extensions/amp-analytics/0.1/opacity.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {computedStyle} from '#core/dom/style';
 
 /**
diff --git a/extensions/amp-analytics/0.1/requests.js b/extensions/amp-analytics/0.1/requests.js
index 2ecdaca28d58..7fa8f2c5231f 100644
--- a/extensions/amp-analytics/0.1/requests.js
+++ b/extensions/amp-analytics/0.1/requests.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AnalyticsEventType} from './events';
 import {BatchSegmentDef, defaultSerializer} from './transport-serializer';
 import {ExpansionOptions, variableServiceForDoc} from './variables';
diff --git a/extensions/amp-analytics/0.1/resource-timing.js b/extensions/amp-analytics/0.1/resource-timing.js
index d58960a88650..6bfa5152839f 100644
--- a/extensions/amp-analytics/0.1/resource-timing.js
+++ b/extensions/amp-analytics/0.1/resource-timing.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ExpansionOptions, variableServiceForDoc} from './variables';
 import {findIndex} from '#core/types/array';
 import {isObject} from '#core/types';
diff --git a/extensions/amp-analytics/0.1/sandbox-vars-allowlist.js b/extensions/amp-analytics/0.1/sandbox-vars-allowlist.js
index 50e78cc64727..fb71ad5c645e 100644
--- a/extensions/amp-analytics/0.1/sandbox-vars-allowlist.js
+++ b/extensions/amp-analytics/0.1/sandbox-vars-allowlist.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Used for inserted scoped analytics element.
  * @const {!Object<string, boolean>}
diff --git a/extensions/amp-analytics/0.1/scroll-manager.js b/extensions/amp-analytics/0.1/scroll-manager.js
index f927c81bbfb3..3bce30c8d99b 100644
--- a/extensions/amp-analytics/0.1/scroll-manager.js
+++ b/extensions/amp-analytics/0.1/scroll-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Observable} from '#core/data-structures/observable';
 import {Services} from '#service';
 import {devAssert} from '../../../src/log';
diff --git a/extensions/amp-analytics/0.1/session-manager.js b/extensions/amp-analytics/0.1/session-manager.js
index b4d74c8a32be..4b8dff4c7fed 100644
--- a/extensions/amp-analytics/0.1/session-manager.js
+++ b/extensions/amp-analytics/0.1/session-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {dev, user} from '../../../src/log';
 import {
diff --git a/extensions/amp-analytics/0.1/test-e2e/test-browser-event.js b/extensions/amp-analytics/0.1/test-e2e/test-browser-event.js
index b1437d974430..fa7f722f723b 100644
--- a/extensions/amp-analytics/0.1/test-e2e/test-browser-event.js
+++ b/extensions/amp-analytics/0.1/test-e2e/test-browser-event.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Key} from '../../../../build-system/tasks/e2e/e2e-types';
 
 describes.endtoend(
diff --git a/extensions/amp-analytics/0.1/test-e2e/test-iframe-transport.js b/extensions/amp-analytics/0.1/test-e2e/test-iframe-transport.js
index 3cd66b4aba94..b27e61c061a5 100644
--- a/extensions/amp-analytics/0.1/test-e2e/test-iframe-transport.js
+++ b/extensions/amp-analytics/0.1/test-e2e/test-iframe-transport.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-analytics iframe transport',
   {
diff --git a/extensions/amp-analytics/0.1/test/test-amp-analytics.js b/extensions/amp-analytics/0.1/test/test-amp-analytics.js
index 9205c98247b0..9cbbcbb88f48 100644
--- a/extensions/amp-analytics/0.1/test/test-amp-analytics.js
+++ b/extensions/amp-analytics/0.1/test/test-amp-analytics.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpAnalytics} from '../amp-analytics';
 import {AnalyticsConfig} from '../config';
 import {ClickEventTracker, VisibilityTracker} from '../events';
diff --git a/extensions/amp-analytics/0.1/test/test-analytics-group.js b/extensions/amp-analytics/0.1/test/test-analytics-group.js
index 7acf7e870eda..271504b95701 100644
--- a/extensions/amp-analytics/0.1/test/test-analytics-group.js
+++ b/extensions/amp-analytics/0.1/test/test-analytics-group.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpdocAnalyticsRoot} from '../analytics-root';
 import {
   AnalyticsEventType,
diff --git a/extensions/amp-analytics/0.1/test/test-analytics-root.js b/extensions/amp-analytics/0.1/test/test-analytics-root.js
index d16889449a3e..182a8fa96f9b 100644
--- a/extensions/amp-analytics/0.1/test/test-analytics-root.js
+++ b/extensions/amp-analytics/0.1/test/test-analytics-root.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as IniLoad from '../../../../src/ini-load';
 import {AmpDocShadow} from '#service/ampdoc-impl';
 import {AmpdocAnalyticsRoot, EmbedAnalyticsRoot} from '../analytics-root';
diff --git a/extensions/amp-analytics/0.1/test/test-browser-events.js b/extensions/amp-analytics/0.1/test/test-browser-events.js
index e97a73aa5a7a..1d153c8ea130 100644
--- a/extensions/amp-analytics/0.1/test/test-browser-events.js
+++ b/extensions/amp-analytics/0.1/test/test-browser-events.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpdocAnalyticsRoot} from '../analytics-root';
 import {
   AnalyticsEvent,
diff --git a/extensions/amp-analytics/0.1/test/test-config.js b/extensions/amp-analytics/0.1/test/test-config.js
index c45af4aefded..1fad45a05dbc 100644
--- a/extensions/amp-analytics/0.1/test/test-config.js
+++ b/extensions/amp-analytics/0.1/test/test-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AnalyticsConfig, expandConfigRequest, mergeObjects} from '../config';
 import {Services} from '#service';
 import {installDocService} from '#service/ampdoc-impl';
diff --git a/extensions/amp-analytics/0.1/test/test-cookie-writer.js b/extensions/amp-analytics/0.1/test/test-cookie-writer.js
index 479cec24afdf..ef78eab6a564 100644
--- a/extensions/amp-analytics/0.1/test/test-cookie-writer.js
+++ b/extensions/amp-analytics/0.1/test/test-cookie-writer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as cookie from '../../../../src/cookies';
 import * as fakeTimers from '@sinonjs/fake-timers';
 import {CookieWriter} from '../cookie-writer';
diff --git a/extensions/amp-analytics/0.1/test/test-crc32.js b/extensions/amp-analytics/0.1/test/test-crc32.js
index 407c1c42ce39..9b95de556b6f 100644
--- a/extensions/amp-analytics/0.1/test/test-crc32.js
+++ b/extensions/amp-analytics/0.1/test/test-crc32.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {crc32} from '../crc32';
 
 const testVectors = [
diff --git a/extensions/amp-analytics/0.1/test/test-events.js b/extensions/amp-analytics/0.1/test/test-events.js
index 9b3b19eb136e..9547b3f9fad7 100644
--- a/extensions/amp-analytics/0.1/test/test-events.js
+++ b/extensions/amp-analytics/0.1/test/test-events.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 import {
   AmpStoryEventTracker,
diff --git a/extensions/amp-analytics/0.1/test/test-iframe-transport-client.js b/extensions/amp-analytics/0.1/test/test-iframe-transport-client.js
index 3d890615323a..0d17d32f56d1 100644
--- a/extensions/amp-analytics/0.1/test/test-iframe-transport-client.js
+++ b/extensions/amp-analytics/0.1/test/test-iframe-transport-client.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   IframeTransportClient,
   IframeTransportContext,
diff --git a/extensions/amp-analytics/0.1/test/test-iframe-transport-message-queue.js b/extensions/amp-analytics/0.1/test/test-iframe-transport-message-queue.js
index 033c5d7c024a..3e4c69a21c26 100644
--- a/extensions/amp-analytics/0.1/test/test-iframe-transport-message-queue.js
+++ b/extensions/amp-analytics/0.1/test/test-iframe-transport-message-queue.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {IframeTransportMessageQueue} from '../iframe-transport-message-queue';
 import {createElementWithAttributes} from '#core/dom';
 
diff --git a/extensions/amp-analytics/0.1/test/test-iframe-transport.js b/extensions/amp-analytics/0.1/test/test-iframe-transport.js
index f9d02a08349c..97a5a282c2d7 100644
--- a/extensions/amp-analytics/0.1/test/test-iframe-transport.js
+++ b/extensions/amp-analytics/0.1/test/test-iframe-transport.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   IframeTransport,
   getIframeTransportScriptUrlForTesting,
diff --git a/extensions/amp-analytics/0.1/test/test-instrumentation.js b/extensions/amp-analytics/0.1/test/test-instrumentation.js
index 15f50e301a48..49353f5bde1c 100644
--- a/extensions/amp-analytics/0.1/test/test-instrumentation.js
+++ b/extensions/amp-analytics/0.1/test/test-instrumentation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpdocAnalyticsRoot, EmbedAnalyticsRoot} from '../analytics-root';
 import {AnalyticsEventType, CustomEventTracker} from '../events';
 import {InstrumentationService} from '../instrumentation';
diff --git a/extensions/amp-analytics/0.1/test/test-linker-manager.js b/extensions/amp-analytics/0.1/test/test-linker-manager.js
index 550d20128679..26e508661953 100644
--- a/extensions/amp-analytics/0.1/test/test-linker-manager.js
+++ b/extensions/amp-analytics/0.1/test/test-linker-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Cookies from '../../../../src/cookies';
 import {
   LinkerManager,
diff --git a/extensions/amp-analytics/0.1/test/test-linker-reader.js b/extensions/amp-analytics/0.1/test/test-linker-reader.js
index 4c6d505e02c4..fdb3b92c828a 100644
--- a/extensions/amp-analytics/0.1/test/test-linker-reader.js
+++ b/extensions/amp-analytics/0.1/test/test-linker-reader.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   installLinkerReaderService,
   linkerReaderServiceFor,
diff --git a/extensions/amp-analytics/0.1/test/test-linker.js b/extensions/amp-analytics/0.1/test/test-linker.js
index d36ab0ac4898..088d983bc7a6 100644
--- a/extensions/amp-analytics/0.1/test/test-linker.js
+++ b/extensions/amp-analytics/0.1/test/test-linker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createLinker, parseLinker} from '../linker';
 import {mockWindowInterface} from '#testing/test-helper';
 
diff --git a/extensions/amp-analytics/0.1/test/test-opacity.js b/extensions/amp-analytics/0.1/test/test-opacity.js
index 6054b0ca1644..150bb3d8079a 100644
--- a/extensions/amp-analytics/0.1/test/test-opacity.js
+++ b/extensions/amp-analytics/0.1/test/test-opacity.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getMinOpacity} from '../opacity';
 
 describes.realWin('getMinOpacity', {amp: true}, (env) => {
diff --git a/extensions/amp-analytics/0.1/test/test-requests.js b/extensions/amp-analytics/0.1/test/test-requests.js
index 6200083a6d37..f260fcbf7823 100644
--- a/extensions/amp-analytics/0.1/test/test-requests.js
+++ b/extensions/amp-analytics/0.1/test/test-requests.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as ResourceTiming from '../resource-timing';
 import * as fakeTimers from '@sinonjs/fake-timers';
 import * as log from '../../../../src/log';
diff --git a/extensions/amp-analytics/0.1/test/test-resource-timing.js b/extensions/amp-analytics/0.1/test/test-resource-timing.js
index 445627a4e479..78e065a03320 100644
--- a/extensions/amp-analytics/0.1/test/test-resource-timing.js
+++ b/extensions/amp-analytics/0.1/test/test-resource-timing.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getResourceTiming} from '../resource-timing';
 import {installLinkerReaderService} from '../linker-reader';
 import {installSessionServiceForTesting} from '../session-manager';
diff --git a/extensions/amp-analytics/0.1/test/test-scroll-manager.js b/extensions/amp-analytics/0.1/test/test-scroll-manager.js
index c9dc3943b37e..b3d9f2527bfd 100644
--- a/extensions/amp-analytics/0.1/test/test-scroll-manager.js
+++ b/extensions/amp-analytics/0.1/test/test-scroll-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpdocAnalyticsRoot} from '../analytics-root';
 import {ScrollManager} from '../scroll-manager';
 
diff --git a/extensions/amp-analytics/0.1/test/test-session-manager.js b/extensions/amp-analytics/0.1/test/test-session-manager.js
index 24933b2c39bb..731536c7be51 100644
--- a/extensions/amp-analytics/0.1/test/test-session-manager.js
+++ b/extensions/amp-analytics/0.1/test/test-session-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Listen from '../../../../src/event-helper';
 import {
   SESSION_MAX_AGE_MILLIS,
diff --git a/extensions/amp-analytics/0.1/test/test-transport-serializers.js b/extensions/amp-analytics/0.1/test/test-transport-serializers.js
index fdf0d2081e8b..dee73a8814a1 100644
--- a/extensions/amp-analytics/0.1/test/test-transport-serializers.js
+++ b/extensions/amp-analytics/0.1/test/test-transport-serializers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {TransportSerializers} from '../transport-serializer';
 import {dict} from '#core/types/object';
 import {isArray} from '#core/types';
diff --git a/extensions/amp-analytics/0.1/test/test-transport.js b/extensions/amp-analytics/0.1/test/test-transport.js
index 90129d2dda6a..51b56b47f4e8 100644
--- a/extensions/amp-analytics/0.1/test/test-transport.js
+++ b/extensions/amp-analytics/0.1/test/test-transport.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 import {AmpScriptService} from '../../../amp-script/0.1/amp-script';
 import {ImagePixelVerifier, mockWindowInterface} from '#testing/test-helper';
diff --git a/extensions/amp-analytics/0.1/test/test-variables.js b/extensions/amp-analytics/0.1/test/test-variables.js
index 77de9e9379b9..5dd44587533a 100644
--- a/extensions/amp-analytics/0.1/test/test-variables.js
+++ b/extensions/amp-analytics/0.1/test/test-variables.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   ExpansionOptions,
   VariableService,
diff --git a/extensions/amp-analytics/0.1/test/test-vendors.js b/extensions/amp-analytics/0.1/test/test-vendors.js
index db6bec743e6c..2dddc6691ed1 100644
--- a/extensions/amp-analytics/0.1/test/test-vendors.js
+++ b/extensions/amp-analytics/0.1/test/test-vendors.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpAnalytics} from '../amp-analytics';
 import {AnalyticsConfig} from '../config';
 import {ExpansionOptions, variableServiceForDoc} from '../variables';
diff --git a/extensions/amp-analytics/0.1/test/test-video-analytics.js b/extensions/amp-analytics/0.1/test/test-video-analytics.js
index b00c164a8175..66e3adc71c79 100644
--- a/extensions/amp-analytics/0.1/test/test-video-analytics.js
+++ b/extensions/amp-analytics/0.1/test/test-video-analytics.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpdocAnalyticsRoot} from '../analytics-root';
 import {AnalyticsEvent, AnalyticsEventType, VideoEventTracker} from '../events';
 import {dispatchCustomEvent} from 'src/core/dom/index';
diff --git a/extensions/amp-analytics/0.1/test/test-visibility-manager.js b/extensions/amp-analytics/0.1/test/test-visibility-manager.js
index 465d9c772535..3d73fc43301c 100644
--- a/extensions/amp-analytics/0.1/test/test-visibility-manager.js
+++ b/extensions/amp-analytics/0.1/test/test-visibility-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {FIE_EMBED_PROP} from '../../../../src/iframe-helper';
 import {Services} from '#service';
 import {
diff --git a/extensions/amp-analytics/0.1/test/test-visibility-model.js b/extensions/amp-analytics/0.1/test/test-visibility-model.js
index 128c619390d4..707719f48966 100644
--- a/extensions/amp-analytics/0.1/test/test-visibility-model.js
+++ b/extensions/amp-analytics/0.1/test/test-visibility-model.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {VisibilityModel} from '../visibility-model';
 
 const NO_SPEC = {};
diff --git a/extensions/amp-analytics/0.1/transport-serializer.js b/extensions/amp-analytics/0.1/transport-serializer.js
index 6b394150cdbc..38f168fbbf16 100644
--- a/extensions/amp-analytics/0.1/transport-serializer.js
+++ b/extensions/amp-analytics/0.1/transport-serializer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   appendEncodedParamStringToUrl,
   serializeQueryString,
diff --git a/extensions/amp-analytics/0.1/transport.js b/extensions/amp-analytics/0.1/transport.js
index 021d0ed6f091..3a870a5b7862 100644
--- a/extensions/amp-analytics/0.1/transport.js
+++ b/extensions/amp-analytics/0.1/transport.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   BatchSegmentDef,
   RequestDef,
diff --git a/extensions/amp-analytics/0.1/variables.js b/extensions/amp-analytics/0.1/variables.js
index cb09159906c9..30acff606e1f 100644
--- a/extensions/amp-analytics/0.1/variables.js
+++ b/extensions/amp-analytics/0.1/variables.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {SESSION_VALUES, sessionServicePromiseForDoc} from './session-manager';
 import {Services} from '#service';
 import {TickLabel} from '#core/constants/enums';
diff --git a/extensions/amp-analytics/0.1/visibility-manager.js b/extensions/amp-analytics/0.1/visibility-manager.js
index 95679a42d2d1..4507da108832 100644
--- a/extensions/amp-analytics/0.1/visibility-manager.js
+++ b/extensions/amp-analytics/0.1/visibility-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {VisibilityModel} from './visibility-model';
 import {dev, user} from '../../../src/log';
diff --git a/extensions/amp-analytics/0.1/visibility-model.js b/extensions/amp-analytics/0.1/visibility-model.js
index 1dd51144a463..ae9da0543779 100644
--- a/extensions/amp-analytics/0.1/visibility-model.js
+++ b/extensions/amp-analytics/0.1/visibility-model.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {Observable} from '#core/data-structures/observable';
 import {devAssert} from '../../../src/log';
diff --git a/extensions/amp-analytics/amp-analytics.md b/extensions/amp-analytics/amp-analytics.md
index 2df783ad8c39..09ead71aa539 100644
--- a/extensions/amp-analytics/amp-analytics.md
+++ b/extensions/amp-analytics/amp-analytics.md
@@ -8,22 +8,6 @@ teaser:
   text: Captures analytics data from an AMP document.
 ---
 
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-analytics
 
 ## Usage
diff --git a/extensions/amp-analytics/amp-components-analytics.md b/extensions/amp-analytics/amp-components-analytics.md
index 7e9434a91cae..255d3ebb2dcb 100644
--- a/extensions/amp-analytics/amp-components-analytics.md
+++ b/extensions/amp-analytics/amp-components-analytics.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Implementing analytics for AMP components
 
 ## APIs
diff --git a/extensions/amp-analytics/amp-video-analytics.md b/extensions/amp-analytics/amp-video-analytics.md
index ddb515a48934..66701d9c8ed2 100644
--- a/extensions/amp-analytics/amp-video-analytics.md
+++ b/extensions/amp-analytics/amp-video-analytics.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Video analytics
 
 ## Support
diff --git a/extensions/amp-analytics/analytics-vendors-list.md b/extensions/amp-analytics/analytics-vendors-list.md
index 68b3399fcfee..3c2a28e6bfcb 100644
--- a/extensions/amp-analytics/analytics-vendors-list.md
+++ b/extensions/amp-analytics/analytics-vendors-list.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 <!--
   Run to insert missing sections:
     amp check-analytics-vendors-list --fix
diff --git a/extensions/amp-anim/0.1/amp-anim.js b/extensions/amp-anim/0.1/amp-anim.js
index 4d6b8828ca59..f6dae4965de5 100644
--- a/extensions/amp-anim/0.1/amp-anim.js
+++ b/extensions/amp-anim/0.1/amp-anim.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as st from '#core/dom/style';
 import {applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
 import {dev} from '../../../src/log';
diff --git a/extensions/amp-anim/0.1/test/test-amp-anim.js b/extensions/amp-anim/0.1/test/test-amp-anim.js
index b320825cd2ec..39dbb727e796 100644
--- a/extensions/amp-anim/0.1/test/test-amp-anim.js
+++ b/extensions/amp-anim/0.1/test/test-amp-anim.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpAnim, SRC_PLACEHOLDER} from '../amp-anim';
 
 const EXAMPLE_SRCSET = `https://media.giphy.com/media/yFQ0ywscgobJK/giphy.gif 1282w,
diff --git a/extensions/amp-anim/amp-anim.md b/extensions/amp-anim/amp-anim.md
index 87cc0846ae72..439008b7ce5a 100644
--- a/extensions/amp-anim/amp-anim.md
+++ b/extensions/amp-anim/amp-anim.md
@@ -8,22 +8,6 @@ teaser:
   text: Manages an animated image, typically a GIF.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-anim
 
 ## Usage
diff --git a/extensions/amp-animation-polyfill/0.1/amp-animation-polyfill.js b/extensions/amp-animation-polyfill/0.1/amp-animation-polyfill.js
index fcc78b0a7792..0d00db2c8c3d 100644
--- a/extensions/amp-animation-polyfill/0.1/amp-animation-polyfill.js
+++ b/extensions/amp-animation-polyfill/0.1/amp-animation-polyfill.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {installWebAnimations} from 'web-animations-js/web-animations.install';
 
 import {Services} from '#service';
diff --git a/extensions/amp-animation/0.1/amp-animation.js b/extensions/amp-animation/0.1/amp-animation.js
index b994d64b0e9b..2268df805573 100644
--- a/extensions/amp-animation/0.1/amp-animation.js
+++ b/extensions/amp-animation/0.1/amp-animation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {getChildJsonConfig} from '#core/dom';
 import {setInitialDisplay, setStyles, toggle} from '#core/dom/style';
diff --git a/extensions/amp-animation/0.1/install-polyfill.js b/extensions/amp-animation/0.1/install-polyfill.js
index e6e7fe22e3c6..0f785fc086b0 100644
--- a/extensions/amp-animation/0.1/install-polyfill.js
+++ b/extensions/amp-animation/0.1/install-polyfill.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Deferred} from '#core/data-structures/promise';
 
 import {Services} from '#service';
diff --git a/extensions/amp-animation/0.1/parsers/css-expr-ast.js b/extensions/amp-animation/0.1/parsers/css-expr-ast.js
index a71c98a035a5..c58e87b65efc 100644
--- a/extensions/amp-animation/0.1/parsers/css-expr-ast.js
+++ b/extensions/amp-animation/0.1/parsers/css-expr-ast.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const FINAL_URL_RE = /^(data|https)\:/i;
 const DEG_TO_RAD = (2 * Math.PI) / 360;
 const GRAD_TO_RAD = Math.PI / 200;
diff --git a/extensions/amp-animation/0.1/parsers/css-expr.js b/extensions/amp-animation/0.1/parsers/css-expr.js
index c1e32529c666..84869a765c1b 100644
--- a/extensions/amp-animation/0.1/parsers/css-expr.js
+++ b/extensions/amp-animation/0.1/parsers/css-expr.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {cssParser as parser} from '#build/parsers/css-expr-impl';
 
 /**
diff --git a/extensions/amp-animation/0.1/parsers/keyframes-extractor.js b/extensions/amp-animation/0.1/parsers/keyframes-extractor.js
index 01b8b6eb2d02..a8f4f50f7292 100644
--- a/extensions/amp-animation/0.1/parsers/keyframes-extractor.js
+++ b/extensions/amp-animation/0.1/parsers/keyframes-extractor.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {endsWith} from '#core/types/string';
 import {toWin} from '#core/window';
 
diff --git a/extensions/amp-animation/0.1/runners/animation-runner.js b/extensions/amp-animation/0.1/runners/animation-runner.js
index fe6c5a6abf0f..0af9d5561f29 100644
--- a/extensions/amp-animation/0.1/runners/animation-runner.js
+++ b/extensions/amp-animation/0.1/runners/animation-runner.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   WebAnimationPlayState, // eslint-disable-line no-unused-vars
 } from '../web-animation-types';
diff --git a/extensions/amp-animation/0.1/runners/native-web-animation-runner.js b/extensions/amp-animation/0.1/runners/native-web-animation-runner.js
index f4e1a78b2aab..322cbca8015c 100644
--- a/extensions/amp-animation/0.1/runners/native-web-animation-runner.js
+++ b/extensions/amp-animation/0.1/runners/native-web-animation-runner.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Observable} from '#core/data-structures/observable';
 import {assertDoesNotContainDisplay, setStyles} from '#core/dom/style';
 
diff --git a/extensions/amp-animation/0.1/runners/scrolltimeline-worklet-runner.js b/extensions/amp-animation/0.1/runners/scrolltimeline-worklet-runner.js
index 319785a890a4..f004c8189482 100644
--- a/extensions/amp-animation/0.1/runners/scrolltimeline-worklet-runner.js
+++ b/extensions/amp-animation/0.1/runners/scrolltimeline-worklet-runner.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {assertDoesNotContainDisplay, px, setStyles} from '#core/dom/style';
 
 import {Services} from '#service';
diff --git a/extensions/amp-animation/0.1/runners/utils.js b/extensions/amp-animation/0.1/runners/utils.js
index 63089c26d8f5..a8833f9d13d4 100644
--- a/extensions/amp-animation/0.1/runners/utils.js
+++ b/extensions/amp-animation/0.1/runners/utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {userAssert} from '../../../../src/log';
 
 /**
diff --git a/extensions/amp-animation/0.1/storybook/Basic.amp.js b/extensions/amp-animation/0.1/storybook/Basic.amp.js
index 96d27889e64b..5280ab7acb22 100644
--- a/extensions/amp-animation/0.1/storybook/Basic.amp.js
+++ b/extensions/amp-animation/0.1/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {select, text, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-animation/0.1/storybook/Random.amp.js b/extensions/amp-animation/0.1/storybook/Random.amp.js
index 9c3fd8deac0c..df7af0e301ad 100644
--- a/extensions/amp-animation/0.1/storybook/Random.amp.js
+++ b/extensions/amp-animation/0.1/storybook/Random.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-animation/0.1/storybook/template.js b/extensions/amp-animation/0.1/storybook/template.js
index edaaf2db5808..4bd98e74e139 100644
--- a/extensions/amp-animation/0.1/storybook/template.js
+++ b/extensions/amp-animation/0.1/storybook/template.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {button, number, select, text} from '@storybook/addon-knobs';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-animation/0.1/test-e2e/test-amp-animation.js b/extensions/amp-animation/0.1/test-e2e/test-amp-animation.js
index 3bab75e9da9d..4199ece8de50 100644
--- a/extensions/amp-animation/0.1/test-e2e/test-amp-animation.js
+++ b/extensions/amp-animation/0.1/test-e2e/test-amp-animation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-animation',
   {
diff --git a/extensions/amp-animation/0.1/test/test-amp-animation.js b/extensions/amp-animation/0.1/test/test-amp-animation.js
index 4d03ad215b5c..ca2fdd053b0b 100644
--- a/extensions/amp-animation/0.1/test/test-amp-animation.js
+++ b/extensions/amp-animation/0.1/test/test-amp-animation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {DEFAULT_ACTION} from '#core/constants/action-constants';
 
 import {AmpAnimation} from '../amp-animation';
diff --git a/extensions/amp-animation/0.1/test/test-css-expr-parser.js b/extensions/amp-animation/0.1/test/test-css-expr-parser.js
index bde5bd809057..dfd9e871757c 100644
--- a/extensions/amp-animation/0.1/test/test-css-expr-parser.js
+++ b/extensions/amp-animation/0.1/test/test-css-expr-parser.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseCss} from '../parsers/css-expr';
 import * as ast from '../parsers/css-expr-ast';
 
diff --git a/extensions/amp-animation/0.1/test/test-css-expr-resolve-calc.js b/extensions/amp-animation/0.1/test/test-css-expr-resolve-calc.js
index 2a74e721ee55..44375a2669e5 100644
--- a/extensions/amp-animation/0.1/test/test-css-expr-resolve-calc.js
+++ b/extensions/amp-animation/0.1/test/test-css-expr-resolve-calc.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as ast from '../parsers/css-expr-ast';
 
 describes.sandboxed('CSS resolve calc', {}, (env) => {
diff --git a/extensions/amp-animation/0.1/test/test-css-expr-resolve-clip-path.js b/extensions/amp-animation/0.1/test/test-css-expr-resolve-clip-path.js
index 7798ceffc797..d62e52f87993 100644
--- a/extensions/amp-animation/0.1/test/test-css-expr-resolve-clip-path.js
+++ b/extensions/amp-animation/0.1/test/test-css-expr-resolve-clip-path.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as ast from '../parsers/css-expr-ast';
 
 describes.sandboxed('CSS resolve clip-path', {}, (env) => {
diff --git a/extensions/amp-animation/0.1/test/test-css-expr-resolve.js b/extensions/amp-animation/0.1/test/test-css-expr-resolve.js
index c1ff45ec14eb..82f36f9653c3 100644
--- a/extensions/amp-animation/0.1/test/test-css-expr-resolve.js
+++ b/extensions/amp-animation/0.1/test/test-css-expr-resolve.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as ast from '../parsers/css-expr-ast';
 
 describes.sandboxed('CSS resolve', {}, (env) => {
diff --git a/extensions/amp-animation/0.1/test/test-keyframes-extractor.js b/extensions/amp-animation/0.1/test/test-keyframes-extractor.js
index 45371b6520f5..bd681231275b 100644
--- a/extensions/amp-animation/0.1/test/test-keyframes-extractor.js
+++ b/extensions/amp-animation/0.1/test/test-keyframes-extractor.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {poll} from '#testing/iframe';
 
 import {extractKeyframes} from '../parsers/keyframes-extractor';
diff --git a/extensions/amp-animation/0.1/test/test-web-animations.js b/extensions/amp-animation/0.1/test/test-web-animations.js
index 276bf2ed1102..ac77019b5355 100644
--- a/extensions/amp-animation/0.1/test/test-web-animations.js
+++ b/extensions/amp-animation/0.1/test/test-web-animations.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {closestAncestorElementBySelector} from '#core/dom/query';
 import {htmlFor, htmlRefs} from '#core/dom/static-template';
 import {isArray, isObject} from '#core/types';
diff --git a/extensions/amp-animation/0.1/web-animation-service.js b/extensions/amp-animation/0.1/web-animation-service.js
index ea49265f1b2d..2ec8e4af7736 100644
--- a/extensions/amp-animation/0.1/web-animation-service.js
+++ b/extensions/amp-animation/0.1/web-animation-service.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Services} from '#service';
 
 import {installWebAnimationsIfNecessary} from './install-polyfill';
diff --git a/extensions/amp-animation/0.1/web-animation-types.js b/extensions/amp-animation/0.1/web-animation-types.js
index c6dd11266c77..116631e800a8 100644
--- a/extensions/amp-animation/0.1/web-animation-types.js
+++ b/extensions/amp-animation/0.1/web-animation-types.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // WARNING
 // WARNING
 // WARNING
diff --git a/extensions/amp-animation/0.1/web-animations.js b/extensions/amp-animation/0.1/web-animations.js
index ec00816e4dd1..0d0d592e3a4f 100644
--- a/extensions/amp-animation/0.1/web-animations.js
+++ b/extensions/amp-animation/0.1/web-animations.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {escapeCssSelectorIdent} from '#core/dom/css-selectors';
 import {layoutRectLtwh} from '#core/dom/layout/rect';
 import {
diff --git a/extensions/amp-animation/amp-animation.md b/extensions/amp-animation/amp-animation.md
index 914f8a2bca4c..2444de5b881b 100644
--- a/extensions/amp-animation/amp-animation.md
+++ b/extensions/amp-animation/amp-animation.md
@@ -7,22 +7,6 @@ teaser:
   text: Defines and displays an animation.
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-animation
 
 ## Usage
diff --git a/extensions/amp-apester-media/0.1/amp-apester-media.css b/extensions/amp-apester-media/0.1/amp-apester-media.css
index 7263db7c9a4d..b9a52ac6b3d7 100644
--- a/extensions/amp-apester-media/0.1/amp-apester-media.css
+++ b/extensions/amp-apester-media/0.1/amp-apester-media.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /* amp-apester-iframe */
 
diff --git a/extensions/amp-apester-media/0.1/monetization/companion/bottomAd.js b/extensions/amp-apester-media/0.1/monetization/companion/bottomAd.js
index 003165ecc931..b12849382623 100644
--- a/extensions/amp-apester-media/0.1/monetization/companion/bottomAd.js
+++ b/extensions/amp-apester-media/0.1/monetization/companion/bottomAd.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Services} from '#service';
 import {createElementWithAttributes} from '#core/dom';
 import {dict, getValueForExpr} from '#core/types/object';
diff --git a/extensions/amp-apester-media/0.1/monetization/companion/display.js b/extensions/amp-apester-media/0.1/monetization/companion/display.js
index 3e615df270d0..44cf3b8daabf 100644
--- a/extensions/amp-apester-media/0.1/monetization/companion/display.js
+++ b/extensions/amp-apester-media/0.1/monetization/companion/display.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {createElementWithAttributes} from '#core/dom';
 import {dict, getValueForExpr} from '#core/types/object';
diff --git a/extensions/amp-apester-media/0.1/monetization/companion/video.js b/extensions/amp-apester-media/0.1/monetization/companion/video.js
index f37178e6482a..ae62247be93f 100644
--- a/extensions/amp-apester-media/0.1/monetization/companion/video.js
+++ b/extensions/amp-apester-media/0.1/monetization/companion/video.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {createElementWithAttributes} from '#core/dom';
 import {dict, getValueForExpr} from '#core/types/object';
diff --git a/extensions/amp-apester-media/0.1/monetization/consent-util.js b/extensions/amp-apester-media/0.1/monetization/consent-util.js
index 004aee078822..9508af77ae54 100644
--- a/extensions/amp-apester-media/0.1/monetization/consent-util.js
+++ b/extensions/amp-apester-media/0.1/monetization/consent-util.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 import {
   getConsentPolicyInfo,
diff --git a/extensions/amp-apester-media/0.1/monetization/index.js b/extensions/amp-apester-media/0.1/monetization/index.js
index dba5db4bcc59..85e995660861 100644
--- a/extensions/amp-apester-media/0.1/monetization/index.js
+++ b/extensions/amp-apester-media/0.1/monetization/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {getConsentData} from './consent-util';
 import {handleCompanionBottomAd} from './companion/bottomAd';
 import {handleCompanionDisplay} from './companion/display';
diff --git a/extensions/amp-apester-media/0.1/test/test-amp-apester-media-utils.js b/extensions/amp-apester-media/0.1/test/test-amp-apester-media-utils.js
index ef14c443827a..ca6184cecbb7 100644
--- a/extensions/amp-apester-media/0.1/test/test-amp-apester-media-utils.js
+++ b/extensions/amp-apester-media/0.1/test/test-amp-apester-media-utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {
   extractArticleTags,
diff --git a/extensions/amp-apester-media/0.1/test/test-amp-apester-media.js b/extensions/amp-apester-media/0.1/test/test-amp-apester-media.js
index 638b0ab18961..8d07d5a86be4 100644
--- a/extensions/amp-apester-media/0.1/test/test-amp-apester-media.js
+++ b/extensions/amp-apester-media/0.1/test/test-amp-apester-media.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import '../amp-apester-media';
 import {Services} from '#service';
 
diff --git a/extensions/amp-apester-media/0.1/test/test-amp-apester-monetization.js b/extensions/amp-apester-media/0.1/test/test-amp-apester-monetization.js
index f036bbe2cae0..71ec57578362 100644
--- a/extensions/amp-apester-media/0.1/test/test-amp-apester-monetization.js
+++ b/extensions/amp-apester-media/0.1/test/test-amp-apester-monetization.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {handleCompanionAds} from '../monetization';
 import {installDocService} from '#service/ampdoc-impl';
diff --git a/extensions/amp-apester-media/amp-apester-media.md b/extensions/amp-apester-media/amp-apester-media.md
index c1a1377902eb..bf3de1067fc5 100644
--- a/extensions/amp-apester-media/amp-apester-media.md
+++ b/extensions/amp-apester-media/amp-apester-media.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays an Apester smart unit.
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-apester-media
 
 ## Usage
diff --git a/extensions/amp-app-banner/0.1/amp-app-banner.css b/extensions/amp-app-banner/0.1/amp-app-banner.css
index 4875ccdee77f..b1535ed67622 100644
--- a/extensions/amp-app-banner/0.1/amp-app-banner.css
+++ b/extensions/amp-app-banner/0.1/amp-app-banner.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-app-banner {
   position: fixed !important;
diff --git a/extensions/amp-app-banner/0.1/amp-app-banner.js b/extensions/amp-app-banner/0.1/amp-app-banner.js
index 7d36b8e1706c..35a0c3056260 100644
--- a/extensions/amp-app-banner/0.1/amp-app-banner.js
+++ b/extensions/amp-app-banner/0.1/amp-app-banner.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeElement} from '#core/dom';
 import {rethrowAsync} from '#core/error';
 import {dict} from '#core/types/object';
diff --git a/extensions/amp-app-banner/0.1/test/test-amp-app-banner.js b/extensions/amp-app-banner/0.1/test/test-amp-app-banner.js
index 75d3b493a7a9..f061f794c1e5 100644
--- a/extensions/amp-app-banner/0.1/test/test-amp-app-banner.js
+++ b/extensions/amp-app-banner/0.1/test/test-amp-app-banner.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {
diff --git a/extensions/amp-audio/0.1/amp-audio.js b/extensions/amp-audio/0.1/amp-audio.js
index 349ea3583d65..65d3f0be1308 100644
--- a/extensions/amp-audio/0.1/amp-audio.js
+++ b/extensions/amp-audio/0.1/amp-audio.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Layout, applyFillContent, isLayoutSizeFixed} from '#core/dom/layout';
 import {propagateAttributes} from '#core/dom/propagate-attributes';
 import {realChildNodes} from '#core/dom/query';
diff --git a/extensions/amp-audio/0.1/test/test-amp-audio.js b/extensions/amp-audio/0.1/test/test-amp-audio.js
index 8b47fe94b110..ed63a3b428c3 100644
--- a/extensions/amp-audio/0.1/test/test-amp-audio.js
+++ b/extensions/amp-audio/0.1/test/test-amp-audio.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {htmlFor} from '#core/dom/static-template';
 
 import {naturalDimensions_} from '../../../../src/static-layout';
diff --git a/extensions/amp-audio/amp-audio.md b/extensions/amp-audio/amp-audio.md
index 4698865abf09..47f6a586eb38 100644
--- a/extensions/amp-audio/amp-audio.md
+++ b/extensions/amp-audio/amp-audio.md
@@ -8,22 +8,6 @@ teaser:
   text: Replaces the HTML5 audio tag.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-audio
 
 ## Usage
diff --git a/extensions/amp-auto-ads/0.1/ad-network-config.js b/extensions/amp-auto-ads/0.1/ad-network-config.js
index 91d21fe063b6..6612a1e945d8 100644
--- a/extensions/amp-auto-ads/0.1/ad-network-config.js
+++ b/extensions/amp-auto-ads/0.1/ad-network-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AdSenseNetworkConfig} from './adsense-network-config';
 import {AlrightNetworkConfig} from './alright-network-config';
 import {DenakopNetworkConfig} from './denakop-network-config';
diff --git a/extensions/amp-auto-ads/0.1/ad-strategy.js b/extensions/amp-auto-ads/0.1/ad-strategy.js
index 571104788ff1..3a7b0714c976 100644
--- a/extensions/amp-auto-ads/0.1/ad-strategy.js
+++ b/extensions/amp-auto-ads/0.1/ad-strategy.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {tryResolve} from '#core/data-structures/promise';
 
 import {SizeInfoDef} from './ad-network-config';
diff --git a/extensions/amp-auto-ads/0.1/ad-tracker.js b/extensions/amp-auto-ads/0.1/ad-tracker.js
index e18f4791211d..ef82184e08a4 100644
--- a/extensions/amp-auto-ads/0.1/ad-tracker.js
+++ b/extensions/amp-auto-ads/0.1/ad-tracker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {endsWith} from '#core/types/string';
 
 import {Services} from '#service';
diff --git a/extensions/amp-auto-ads/0.1/adsense-network-config.js b/extensions/amp-auto-ads/0.1/adsense-network-config.js
index 3d64585f0994..3e48dcd9b4c9 100644
--- a/extensions/amp-auto-ads/0.1/adsense-network-config.js
+++ b/extensions/amp-auto-ads/0.1/adsense-network-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {buildUrl} from '#ads/google/a4a/shared/url-builder';
 
 import {dict} from '#core/types/object';
diff --git a/extensions/amp-auto-ads/0.1/alright-network-config.js b/extensions/amp-auto-ads/0.1/alright-network-config.js
index 00fc3bcee48d..feeaaa25f87a 100644
--- a/extensions/amp-auto-ads/0.1/alright-network-config.js
+++ b/extensions/amp-auto-ads/0.1/alright-network-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {buildUrl} from '#ads/google/a4a/shared/url-builder';
 
 import {Layout} from '#core/dom/layout';
diff --git a/extensions/amp-auto-ads/0.1/amp-auto-ads.js b/extensions/amp-auto-ads/0.1/amp-auto-ads.js
index 0109e5fa9189..9cc3b165160b 100644
--- a/extensions/amp-auto-ads/0.1/amp-auto-ads.js
+++ b/extensions/amp-auto-ads/0.1/amp-auto-ads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {isExperimentOn} from '#experiments';
diff --git a/extensions/amp-auto-ads/0.1/anchor-ad-strategy.js b/extensions/amp-auto-ads/0.1/anchor-ad-strategy.js
index 55d732a59808..389e1fc3bad6 100644
--- a/extensions/amp-auto-ads/0.1/anchor-ad-strategy.js
+++ b/extensions/amp-auto-ads/0.1/anchor-ad-strategy.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {createElementWithAttributes} from '#core/dom';
 import {dict} from '#core/types/object';
 
diff --git a/extensions/amp-auto-ads/0.1/attributes.js b/extensions/amp-auto-ads/0.1/attributes.js
index 6bdf226bd4fc..186a1aec690e 100644
--- a/extensions/amp-auto-ads/0.1/attributes.js
+++ b/extensions/amp-auto-ads/0.1/attributes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isArray, isObject} from '#core/types';
 import {dict} from '#core/types/object';
 
diff --git a/extensions/amp-auto-ads/0.1/denakop-network-config.js b/extensions/amp-auto-ads/0.1/denakop-network-config.js
index bb7dc6630027..c02a683ef5d8 100644
--- a/extensions/amp-auto-ads/0.1/denakop-network-config.js
+++ b/extensions/amp-auto-ads/0.1/denakop-network-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {buildUrl} from '#ads/google/a4a/shared/url-builder';
 
 import {dict} from '#core/types/object';
diff --git a/extensions/amp-auto-ads/0.1/doubleclick-network-config.js b/extensions/amp-auto-ads/0.1/doubleclick-network-config.js
index 0503d62e368b..751ed5134bee 100644
--- a/extensions/amp-auto-ads/0.1/doubleclick-network-config.js
+++ b/extensions/amp-auto-ads/0.1/doubleclick-network-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {buildUrl} from '#ads/google/a4a/shared/url-builder';
 
 import {dict} from '#core/types/object';
diff --git a/extensions/amp-auto-ads/0.1/firstimpression.io-network-config.js b/extensions/amp-auto-ads/0.1/firstimpression.io-network-config.js
index b62f3210b3d8..07614e7c2559 100644
--- a/extensions/amp-auto-ads/0.1/firstimpression.io-network-config.js
+++ b/extensions/amp-auto-ads/0.1/firstimpression.io-network-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {buildUrl} from '#ads/google/a4a/shared/url-builder';
 
 import {dict} from '#core/types/object';
diff --git a/extensions/amp-auto-ads/0.1/measure-page-layout-box.js b/extensions/amp-auto-ads/0.1/measure-page-layout-box.js
index ed709423b8dd..c8633d725039 100644
--- a/extensions/amp-auto-ads/0.1/measure-page-layout-box.js
+++ b/extensions/amp-auto-ads/0.1/measure-page-layout-box.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {getPageLayoutBoxBlocking} from '#core/dom/layout/page-layout-box';
 import {toWin} from '#core/window';
 
diff --git a/extensions/amp-auto-ads/0.1/ping-network-config.js b/extensions/amp-auto-ads/0.1/ping-network-config.js
index bb766623ee50..06b06fe65821 100644
--- a/extensions/amp-auto-ads/0.1/ping-network-config.js
+++ b/extensions/amp-auto-ads/0.1/ping-network-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {buildUrl} from '#ads/google/a4a/shared/url-builder';
 
 import {dict} from '#core/types/object';
diff --git a/extensions/amp-auto-ads/0.1/placement.js b/extensions/amp-auto-ads/0.1/placement.js
index d0191e76e4d1..14fab0134e7d 100644
--- a/extensions/amp-auto-ads/0.1/placement.js
+++ b/extensions/amp-auto-ads/0.1/placement.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes} from '#core/dom';
 import {whenUpgradedToCustomElement} from '#core/dom/amp-element-helpers';
 import {
diff --git a/extensions/amp-auto-ads/0.1/premiumads-network-config.js b/extensions/amp-auto-ads/0.1/premiumads-network-config.js
index 6bb25e2cedbb..15d9e76eb554 100644
--- a/extensions/amp-auto-ads/0.1/premiumads-network-config.js
+++ b/extensions/amp-auto-ads/0.1/premiumads-network-config.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {buildUrl} from '#ads/google/a4a/shared/url-builder';
 
 import {Layout} from '#core/dom/layout';
diff --git a/extensions/amp-auto-ads/0.1/test/test-ad-network-config.js b/extensions/amp-auto-ads/0.1/test/test-ad-network-config.js
index 529566bce935..ac4070aca99c 100644
--- a/extensions/amp-auto-ads/0.1/test/test-ad-network-config.js
+++ b/extensions/amp-auto-ads/0.1/test/test-ad-network-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getAdNetworkConfig} from '../ad-network-config';
 
 describes.realWin(
diff --git a/extensions/amp-auto-ads/0.1/test/test-ad-strategy.js b/extensions/amp-auto-ads/0.1/test/test-ad-strategy.js
index 15bb92f2eaa5..1965a920b4df 100644
--- a/extensions/amp-auto-ads/0.1/test/test-ad-strategy.js
+++ b/extensions/amp-auto-ads/0.1/test/test-ad-strategy.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AdStrategy} from '../ad-strategy';
 import {AdTracker} from '../ad-tracker';
 import {PlacementState, getPlacementsFromConfigObj} from '../placement';
diff --git a/extensions/amp-auto-ads/0.1/test/test-ad-tracker.js b/extensions/amp-auto-ads/0.1/test/test-ad-tracker.js
index 6636b1024e6c..9346cc2f71c6 100644
--- a/extensions/amp-auto-ads/0.1/test/test-ad-tracker.js
+++ b/extensions/amp-auto-ads/0.1/test/test-ad-tracker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {layoutRectLtwh} from '#core/dom/layout/rect';
 
 import {Services} from '#service';
diff --git a/extensions/amp-auto-ads/0.1/test/test-adsense-network-config.js b/extensions/amp-auto-ads/0.1/test/test-adsense-network-config.js
index 15594b9d18d7..9d2010246637 100644
--- a/extensions/amp-auto-ads/0.1/test/test-adsense-network-config.js
+++ b/extensions/amp-auto-ads/0.1/test/test-adsense-network-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {getAdNetworkConfig} from '../ad-network-config';
diff --git a/extensions/amp-auto-ads/0.1/test/test-alright-network-config.js b/extensions/amp-auto-ads/0.1/test/test-alright-network-config.js
index a80c505ec07e..9497db709548 100644
--- a/extensions/amp-auto-ads/0.1/test/test-alright-network-config.js
+++ b/extensions/amp-auto-ads/0.1/test/test-alright-network-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {getAdNetworkConfig} from '../ad-network-config';
diff --git a/extensions/amp-auto-ads/0.1/test/test-amp-auto-ads.js b/extensions/amp-auto-ads/0.1/test/test-amp-auto-ads.js
index 164cd6abd9a1..dc8d29b58b44 100644
--- a/extensions/amp-auto-ads/0.1/test/test-amp-auto-ads.js
+++ b/extensions/amp-auto-ads/0.1/test/test-amp-auto-ads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../../../amp-ad/0.1/amp-ad';
 import '../amp-auto-ads';
 import {getA4ARegistry} from '#ads/_a4a-config';
diff --git a/extensions/amp-auto-ads/0.1/test/test-anchor-ad-strategy.js b/extensions/amp-auto-ads/0.1/test/test-anchor-ad-strategy.js
index 4b282589c7a7..3068b53b90ea 100644
--- a/extensions/amp-auto-ads/0.1/test/test-anchor-ad-strategy.js
+++ b/extensions/amp-auto-ads/0.1/test/test-anchor-ad-strategy.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../../../amp-ad/0.1/amp-ad';
 import {waitForChild} from '#core/dom';
 
diff --git a/extensions/amp-auto-ads/0.1/test/test-attributes.js b/extensions/amp-auto-ads/0.1/test/test-attributes.js
index d979924ceae7..ef6fba5c1c15 100644
--- a/extensions/amp-auto-ads/0.1/test/test-attributes.js
+++ b/extensions/amp-auto-ads/0.1/test/test-attributes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Attributes, getAttributesFromConfigObj} from '../attributes';
 
 describes.sandboxed('attributes', {}, () => {
diff --git a/extensions/amp-auto-ads/0.1/test/test-denakop-network-config.js b/extensions/amp-auto-ads/0.1/test/test-denakop-network-config.js
index 2da51dafae8b..dd1cdd24bfc5 100644
--- a/extensions/amp-auto-ads/0.1/test/test-denakop-network-config.js
+++ b/extensions/amp-auto-ads/0.1/test/test-denakop-network-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {getAdNetworkConfig} from '../ad-network-config';
diff --git a/extensions/amp-auto-ads/0.1/test/test-doubleclick-network-config.js b/extensions/amp-auto-ads/0.1/test/test-doubleclick-network-config.js
index aa230397e3b6..da91a94c116b 100644
--- a/extensions/amp-auto-ads/0.1/test/test-doubleclick-network-config.js
+++ b/extensions/amp-auto-ads/0.1/test/test-doubleclick-network-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {getAdNetworkConfig} from '../ad-network-config';
diff --git a/extensions/amp-auto-ads/0.1/test/test-placement.js b/extensions/amp-auto-ads/0.1/test/test-placement.js
index bc5d0c4a8d41..a6bc4e7ec171 100644
--- a/extensions/amp-auto-ads/0.1/test/test-placement.js
+++ b/extensions/amp-auto-ads/0.1/test/test-placement.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../../../amp-ad/0.1/amp-ad';
 import {Services} from '#service';
 
diff --git a/extensions/amp-auto-ads/0.1/test/test-premiumads-network-config.js b/extensions/amp-auto-ads/0.1/test/test-premiumads-network-config.js
index 363832f23f5e..e19012cd7450 100644
--- a/extensions/amp-auto-ads/0.1/test/test-premiumads-network-config.js
+++ b/extensions/amp-auto-ads/0.1/test/test-premiumads-network-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Layout} from '#core/dom/layout';
 
 import {Services} from '#service';
diff --git a/extensions/amp-auto-ads/0.1/test/test-wunderkind-network-config.js b/extensions/amp-auto-ads/0.1/test/test-wunderkind-network-config.js
index 6bac5300d5f4..0fd3c3532826 100644
--- a/extensions/amp-auto-ads/0.1/test/test-wunderkind-network-config.js
+++ b/extensions/amp-auto-ads/0.1/test/test-wunderkind-network-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {getAdNetworkConfig} from '../ad-network-config';
diff --git a/extensions/amp-auto-ads/0.1/wunderkind-network-config.js b/extensions/amp-auto-ads/0.1/wunderkind-network-config.js
index a9ff6f9ece8f..591cf907f71f 100644
--- a/extensions/amp-auto-ads/0.1/wunderkind-network-config.js
+++ b/extensions/amp-auto-ads/0.1/wunderkind-network-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {buildUrl} from '#ads/google/a4a/shared/url-builder';
 
 import {dict} from '#core/types/object';
diff --git a/extensions/amp-auto-ads/amp-auto-ads.md b/extensions/amp-auto-ads/amp-auto-ads.md
index 99c7c5c0590f..d4ee9dd297fc 100644
--- a/extensions/amp-auto-ads/amp-auto-ads.md
+++ b/extensions/amp-auto-ads/amp-auto-ads.md
@@ -6,22 +6,6 @@ teaser:
   text: Dynamically injects ads into an AMP page by using a remotely-served configuration file.
 ---
 
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-auto-ads
 
 ## Usage
diff --git a/extensions/amp-auto-lightbox/0.1/amp-auto-lightbox.js b/extensions/amp-auto-lightbox/0.1/amp-auto-lightbox.js
index 06196d45e529..519d27896d6d 100644
--- a/extensions/amp-auto-lightbox/0.1/amp-auto-lightbox.js
+++ b/extensions/amp-auto-lightbox/0.1/amp-auto-lightbox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Detects <amp-img> elements to set the `lightbox` attribute
  * automatically.
diff --git a/extensions/amp-auto-lightbox/0.1/test-e2e/test-amp-auto-lightbox.js b/extensions/amp-auto-lightbox/0.1/test-e2e/test-amp-auto-lightbox.js
index 0f9ec2cec748..d58e09901f22 100644
--- a/extensions/amp-auto-lightbox/0.1/test-e2e/test-amp-auto-lightbox.js
+++ b/extensions/amp-auto-lightbox/0.1/test-e2e/test-amp-auto-lightbox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-auto-lightbox e2e',
   {
diff --git a/extensions/amp-auto-lightbox/0.1/test/test-amp-auto-lightbox.js b/extensions/amp-auto-lightbox/0.1/test/test-amp-auto-lightbox.js
index db0d789adc7d..cd25d8dc820f 100644
--- a/extensions/amp-auto-lightbox/0.1/test/test-amp-auto-lightbox.js
+++ b/extensions/amp-auto-lightbox/0.1/test/test-amp-auto-lightbox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CommonSignals} from '#core/constants/common-signals';
 import {tryResolve} from '#core/data-structures/promise';
 import {Signals} from '#core/data-structures/signals';
diff --git a/extensions/amp-autocomplete/0.1/amp-autocomplete.css b/extensions/amp-autocomplete/0.1/amp-autocomplete.css
index 50a30b2e6ff8..aaf4df580c04 100644
--- a/extensions/amp-autocomplete/0.1/amp-autocomplete.css
+++ b/extensions/amp-autocomplete/0.1/amp-autocomplete.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /* NOTE: styles that affect sizing are in ampdoc.css to avoid FOUC */
 amp-autocomplete,
diff --git a/extensions/amp-autocomplete/0.1/amp-autocomplete.js b/extensions/amp-autocomplete/0.1/amp-autocomplete.js
index b40126a1d678..e2af88cdc4ee 100644
--- a/extensions/amp-autocomplete/0.1/amp-autocomplete.js
+++ b/extensions/amp-autocomplete/0.1/amp-autocomplete.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {AutocompleteBindingDef} from './autocomplete-binding-def';
 import {AutocompleteBindingInline} from './autocomplete-binding-inline';
diff --git a/extensions/amp-autocomplete/0.1/autocomplete-binding-def.js b/extensions/amp-autocomplete/0.1/autocomplete-binding-def.js
index cd328a25653c..325bed0bb5f9 100644
--- a/extensions/amp-autocomplete/0.1/autocomplete-binding-def.js
+++ b/extensions/amp-autocomplete/0.1/autocomplete-binding-def.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * AutocompleteBindingDef is an interface that provides the specific
  * implementation of amp-autocomplete user input interaction behavior.
diff --git a/extensions/amp-autocomplete/0.1/autocomplete-binding-inline.js b/extensions/amp-autocomplete/0.1/autocomplete-binding-inline.js
index dcd2820281d2..6ae2116eaa8c 100644
--- a/extensions/amp-autocomplete/0.1/autocomplete-binding-inline.js
+++ b/extensions/amp-autocomplete/0.1/autocomplete-binding-inline.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ownProperty} from '#core/types/object';
 import {tryFocus} from '#core/dom';
 import {userAssert} from '../../../src/log';
diff --git a/extensions/amp-autocomplete/0.1/autocomplete-binding-single.js b/extensions/amp-autocomplete/0.1/autocomplete-binding-single.js
index 36c68ffb4ca5..fcba7249392c 100644
--- a/extensions/amp-autocomplete/0.1/autocomplete-binding-single.js
+++ b/extensions/amp-autocomplete/0.1/autocomplete-binding-single.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {user} from '../../../src/log';
 
 /**
diff --git a/extensions/amp-autocomplete/0.1/test-e2e/test-amp-autocomplete-inline.js b/extensions/amp-autocomplete/0.1/test-e2e/test-amp-autocomplete-inline.js
index 9bf8d456ea0d..e0ca01e10ff4 100644
--- a/extensions/amp-autocomplete/0.1/test-e2e/test-amp-autocomplete-inline.js
+++ b/extensions/amp-autocomplete/0.1/test-e2e/test-amp-autocomplete-inline.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-autocomplete',
   {
diff --git a/extensions/amp-autocomplete/0.1/test-e2e/test-amp-autocomplete.js b/extensions/amp-autocomplete/0.1/test-e2e/test-amp-autocomplete.js
index 48411cf0917b..535fc5758a27 100644
--- a/extensions/amp-autocomplete/0.1/test-e2e/test-amp-autocomplete.js
+++ b/extensions/amp-autocomplete/0.1/test-e2e/test-amp-autocomplete.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-autocomplete',
   {
diff --git a/extensions/amp-autocomplete/0.1/test/test-amp-autocomplete-bindings.js b/extensions/amp-autocomplete/0.1/test/test-amp-autocomplete-bindings.js
index 177c3f786260..20260eb39f6c 100644
--- a/extensions/amp-autocomplete/0.1/test/test-amp-autocomplete-bindings.js
+++ b/extensions/amp-autocomplete/0.1/test/test-amp-autocomplete-bindings.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-autocomplete';
 import {AutocompleteBindingInline} from '../autocomplete-binding-inline';
 import {AutocompleteBindingSingle} from '../autocomplete-binding-single';
diff --git a/extensions/amp-autocomplete/0.1/test/test-amp-autocomplete-init.js b/extensions/amp-autocomplete/0.1/test/test-amp-autocomplete-init.js
index 8c3b270e2f19..387c36fbe10a 100644
--- a/extensions/amp-autocomplete/0.1/test/test-amp-autocomplete-init.js
+++ b/extensions/amp-autocomplete/0.1/test/test-amp-autocomplete-init.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-autocomplete';
 
 describes.realWin(
diff --git a/extensions/amp-autocomplete/0.1/test/test-amp-autocomplete.js b/extensions/amp-autocomplete/0.1/test/test-amp-autocomplete.js
index b08b7ecfc57f..5537495cde33 100644
--- a/extensions/amp-autocomplete/0.1/test/test-amp-autocomplete.js
+++ b/extensions/amp-autocomplete/0.1/test/test-amp-autocomplete.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-autocomplete';
 import {AmpAutocomplete} from '../amp-autocomplete';
 import {Keys} from '#core/constants/key-codes';
diff --git a/extensions/amp-base-carousel/0.1/action-source.js b/extensions/amp-base-carousel/0.1/action-source.js
index dc72b2b498dc..44b3b3ba5c90 100644
--- a/extensions/amp-base-carousel/0.1/action-source.js
+++ b/extensions/amp-base-carousel/0.1/action-source.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @enum {number}
  */
diff --git a/extensions/amp-base-carousel/0.1/amp-base-carousel.css b/extensions/amp-base-carousel/0.1/amp-base-carousel.css
index 57c8c5228ee6..4f8846e4dc72 100644
--- a/extensions/amp-base-carousel/0.1/amp-base-carousel.css
+++ b/extensions/amp-base-carousel/0.1/amp-base-carousel.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import 'carousel.css';
 
diff --git a/extensions/amp-base-carousel/0.1/amp-base-carousel.js b/extensions/amp-base-carousel/0.1/amp-base-carousel.js
index bb77a912096a..10af0c93c0c5 100644
--- a/extensions/amp-base-carousel/0.1/amp-base-carousel.js
+++ b/extensions/amp-base-carousel/0.1/amp-base-carousel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionSource} from './action-source';
 import {ActionTrust} from '#core/constants/action-constants';
 import {CSS} from '../../../build/amp-base-carousel-0.1.css';
diff --git a/extensions/amp-base-carousel/0.1/amp-base-carousel.md b/extensions/amp-base-carousel/0.1/amp-base-carousel.md
index 070a3208523d..1c98b35762b4 100644
--- a/extensions/amp-base-carousel/0.1/amp-base-carousel.md
+++ b/extensions/amp-base-carousel/0.1/amp-base-carousel.md
@@ -7,22 +7,6 @@ teaser:
 experimental: true
 ---
 
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-base-carousel
 
 ## Usage
diff --git a/extensions/amp-base-carousel/0.1/array-util.js b/extensions/amp-base-carousel/0.1/array-util.js
index 7f3be4bfbaa4..681fec574bd2 100644
--- a/extensions/amp-base-carousel/0.1/array-util.js
+++ b/extensions/amp-base-carousel/0.1/array-util.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {mod} from '#core/math';
 
 /**
diff --git a/extensions/amp-base-carousel/0.1/auto-advance.js b/extensions/amp-base-carousel/0.1/auto-advance.js
index 02fcee66b8c7..5dda604e8299 100644
--- a/extensions/amp-base-carousel/0.1/auto-advance.js
+++ b/extensions/amp-base-carousel/0.1/auto-advance.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionSource} from './action-source';
 import {CarouselEvents} from './carousel-events';
 import {debounce} from '#core/types/function';
diff --git a/extensions/amp-base-carousel/0.1/carousel-accessibility.js b/extensions/amp-base-carousel/0.1/carousel-accessibility.js
index dbc21568d6d2..bdb2dba6aea6 100644
--- a/extensions/amp-base-carousel/0.1/carousel-accessibility.js
+++ b/extensions/amp-base-carousel/0.1/carousel-accessibility.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CarouselEvents} from './carousel-events';
 import {getDetail} from '../../../src/event-helper';
 
diff --git a/extensions/amp-base-carousel/0.1/carousel-events.js b/extensions/amp-base-carousel/0.1/carousel-events.js
index 0bbe92c9d52a..ef0a640f0fef 100644
--- a/extensions/amp-base-carousel/0.1/carousel-events.js
+++ b/extensions/amp-base-carousel/0.1/carousel-events.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @enum {string} */
 export const CarouselEvents = {
   OFFSET_CHANGE: 'amp-carousel:offsetchange',
diff --git a/extensions/amp-base-carousel/0.1/carousel.css b/extensions/amp-base-carousel/0.1/carousel.css
index 8b26f4b8e1d5..2d9662113656 100644
--- a/extensions/amp-base-carousel/0.1/carousel.css
+++ b/extensions/amp-base-carousel/0.1/carousel.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /**
   * We need a separate container for `position: absolute` for two reasons:
diff --git a/extensions/amp-base-carousel/0.1/carousel.js b/extensions/amp-base-carousel/0.1/carousel.js
index 6b3af68ade30..523c286e8a2a 100644
--- a/extensions/amp-base-carousel/0.1/carousel.js
+++ b/extensions/amp-base-carousel/0.1/carousel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionSource} from './action-source';
 import {
   Alignment,
diff --git a/extensions/amp-base-carousel/0.1/child-layout-manager.js b/extensions/amp-base-carousel/0.1/child-layout-manager.js
index 01c2ff3ba414..43a10c47dad1 100644
--- a/extensions/amp-base-carousel/0.1/child-layout-manager.js
+++ b/extensions/amp-base-carousel/0.1/child-layout-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 /**
diff --git a/extensions/amp-base-carousel/0.1/dimensions.js b/extensions/amp-base-carousel/0.1/dimensions.js
index 4831d02e425e..0c28ccdd4961 100644
--- a/extensions/amp-base-carousel/0.1/dimensions.js
+++ b/extensions/amp-base-carousel/0.1/dimensions.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {mod} from '#core/math';
 import {setImportantStyles, setStyle} from '#core/dom/style';
 
diff --git a/extensions/amp-base-carousel/0.1/responsive-attributes.js b/extensions/amp-base-carousel/0.1/responsive-attributes.js
index 896ae853ab34..681a1ad85a5f 100644
--- a/extensions/amp-base-carousel/0.1/responsive-attributes.js
+++ b/extensions/amp-base-carousel/0.1/responsive-attributes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @typedef {{
  *   mediaQueryList: MediaQueryList,
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/helpers.js b/extensions/amp-base-carousel/0.1/test-e2e/helpers.js
index 5d3f8f131314..8e04ceee57b8 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/helpers.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/helpers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const TAG_NAME = 'amp-base-carousel';
 const SLOTTED_CLASS = 'i-amphtml-carousel-slotted';
 const SPACER_CLASS = 'i-amphtml-carousel-spacer';
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-advance.js b/extensions/amp-base-carousel/0.1/test-e2e/test-advance.js
index c221d5f0478e..88238f343e9a 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-advance.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-advance.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getNextArrow, getPrevArrow, getSlides} from './helpers';
 import {sleep} from '#testing/helpers';
 
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-arrows-in-lightbox.js b/extensions/amp-base-carousel/0.1/test-e2e/test-arrows-in-lightbox.js
index 753d3cab9313..b4fea5bb3f8e 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-arrows-in-lightbox.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-arrows-in-lightbox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getNextArrow, getPrevArrow} from './helpers';
 
 describes.endtoend(
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-arrows-non-looping.js b/extensions/amp-base-carousel/0.1/test-e2e/test-arrows-non-looping.js
index 8620e483edaf..1e30efe0d6bc 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-arrows-non-looping.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-arrows-non-looping.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getNextArrow, getPrevArrow, getScrollingElement} from './helpers';
 
 /** The total number of slides in the carousel */
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-arrows.js b/extensions/amp-base-carousel/0.1/test-e2e/test-arrows.js
index 7f3c8da4f9dd..0e9bd696ff55 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-arrows.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-arrows.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getNextArrow, getPrevArrow, getSlide} from './helpers';
 
 /** The total number of slides in the carousel */
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-autoadvance.js b/extensions/amp-base-carousel/0.1/test-e2e/test-autoadvance.js
index f575fa05fa52..0ded883bb763 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-autoadvance.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-autoadvance.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getSlides} from './helpers';
 
 const pageWidth = 800;
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-carousel.js b/extensions/amp-base-carousel/0.1/test-e2e/test-carousel.js
index 2f75fee71ec0..e977f00c2e0c 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-carousel.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-carousel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getScrollingElement, getSlide, waitForCarouselImg} from './helpers';
 
 const pageWidth = 800;
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-default-attributes.js b/extensions/amp-base-carousel/0.1/test-e2e/test-default-attributes.js
index ba1dfa1321bc..4f1f1214fc1c 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-default-attributes.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-default-attributes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const pageWidth = 800;
 const pageHeight = 800;
 
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-goToSlide.js b/extensions/amp-base-carousel/0.1/test-e2e/test-goToSlide.js
index a49b3af0c65c..baec7a17bc37 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-goToSlide.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-goToSlide.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getPrevArrow, getSlides} from './helpers';
 
 describes.endtoend(
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-grouping.js b/extensions/amp-base-carousel/0.1/test-e2e/test-grouping.js
index 1139501d865e..4e4f0cedbbae 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-grouping.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-grouping.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getScrollingElement, getSlides} from './helpers';
 
 const pageWidth = 800;
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-hidden-controls.js b/extensions/amp-base-carousel/0.1/test-e2e/test-hidden-controls.js
index db9aa792289d..92f2dbfee1af 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-hidden-controls.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-hidden-controls.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getNextArrow} from './helpers';
 
 describes.endtoend(
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-initial-slide.js b/extensions/amp-base-carousel/0.1/test-e2e/test-initial-slide.js
index 0bfdb7bbcd4b..c52a4911e18c 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-initial-slide.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-initial-slide.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getSlide} from './helpers';
 
 const pageWidth = 600;
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-mixed-length-arrows.js b/extensions/amp-base-carousel/0.1/test-e2e/test-mixed-length-arrows.js
index efa51fdad415..62ff0c34b979 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-mixed-length-arrows.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-mixed-length-arrows.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getNextArrow, getPrevArrow} from './helpers';
 
 describes.endtoend(
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-mixed-lengths-no-snap.js b/extensions/amp-base-carousel/0.1/test-e2e/test-mixed-lengths-no-snap.js
index 37f4a5a0ba50..c2255836e8bb 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-mixed-lengths-no-snap.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-mixed-lengths-no-snap.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getScrollingElement, getSlides, getSpacersForSlide} from './helpers';
 
 const pageWidth = 800;
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-mixed-lengths.js b/extensions/amp-base-carousel/0.1/test-e2e/test-mixed-lengths.js
index 01c008148d98..72e5709d2781 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-mixed-lengths.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-mixed-lengths.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getScrollingElement, getSlides, getSpacersForSlide} from './helpers';
 
 const pageWidth = 800;
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-multi-visible-single-advance.js b/extensions/amp-base-carousel/0.1/test-e2e/test-multi-visible-single-advance.js
index 08d33e6befe0..600d41fe45a8 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-multi-visible-single-advance.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-multi-visible-single-advance.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getNextArrow, getPrevArrow, getSlides} from './helpers';
 import {awaitFrameAfter} from '#testing/helpers';
 
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-non-looping.js b/extensions/amp-base-carousel/0.1/test-e2e/test-non-looping.js
index fb478eadfc17..0e588a60d14a 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-non-looping.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-non-looping.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getScrollingElement, getSlide, waitForCarouselImg} from './helpers';
 
 const pageWidth = 800;
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-responsive.js b/extensions/amp-base-carousel/0.1/test-e2e/test-responsive.js
index 7587ea410e59..99698f33e0c0 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-responsive.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-responsive.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getScrollingElement, getSlide, waitForCarouselImg} from './helpers';
 
 const pageWidth = 1000;
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-rtl.js b/extensions/amp-base-carousel/0.1/test-e2e/test-rtl.js
index b65fd23afdd6..dc48283a4fa0 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-rtl.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-rtl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getNextArrow, getPrevArrow, getSlide} from './helpers';
 
 const pageWidth = 800;
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-snap-property.js b/extensions/amp-base-carousel/0.1/test-e2e/test-snap-property.js
index aba0d6145098..937e125c1015 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-snap-property.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-snap-property.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getSlides, getSpacers} from './helpers';
 
 describes.endtoend(
diff --git a/extensions/amp-base-carousel/0.1/test-e2e/test-vertical.js b/extensions/amp-base-carousel/0.1/test-e2e/test-vertical.js
index c0faa5703492..8ddfb119d503 100644
--- a/extensions/amp-base-carousel/0.1/test-e2e/test-vertical.js
+++ b/extensions/amp-base-carousel/0.1/test-e2e/test-vertical.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getScrollingElement, getSlide, waitForCarouselImg} from './helpers';
 
 const pageWidth = 800;
diff --git a/extensions/amp-base-carousel/0.1/test/test-carousel.js b/extensions/amp-base-carousel/0.1/test/test-carousel.js
index df749d67108e..f0b804316799 100644
--- a/extensions/amp-base-carousel/0.1/test/test-carousel.js
+++ b/extensions/amp-base-carousel/0.1/test/test-carousel.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 /**
  * @fileoverview Some unit tests of the internal carousel implementation.
  */
diff --git a/extensions/amp-base-carousel/0.1/test/test-child-layout-manager.js b/extensions/amp-base-carousel/0.1/test/test-child-layout-manager.js
index 730cab43283b..60a0eddf8430 100644
--- a/extensions/amp-base-carousel/0.1/test/test-child-layout-manager.js
+++ b/extensions/amp-base-carousel/0.1/test/test-child-layout-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ChildLayoutManager} from '../child-layout-manager';
 import {Services} from '#service';
 import {setInitialDisplay, setStyles} from '#core/dom/style';
diff --git a/extensions/amp-base-carousel/0.1/test/test-responsive-attributes.js b/extensions/amp-base-carousel/0.1/test/test-responsive-attributes.js
index 4e145924db5e..fa22f460da3b 100644
--- a/extensions/amp-base-carousel/0.1/test/test-responsive-attributes.js
+++ b/extensions/amp-base-carousel/0.1/test/test-responsive-attributes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ResponsiveAttributes} from '../responsive-attributes';
 
 describes.sandboxed('ResponsiveAttributes', {}, (env) => {
diff --git a/extensions/amp-base-carousel/1.0/amp-base-carousel.css b/extensions/amp-base-carousel/1.0/amp-base-carousel.css
index 1c3d031edd06..ae6e20d7aeac 100644
--- a/extensions/amp-base-carousel/1.0/amp-base-carousel.css
+++ b/extensions/amp-base-carousel/1.0/amp-base-carousel.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * Pre-upgrade:
diff --git a/extensions/amp-base-carousel/1.0/amp-base-carousel.js b/extensions/amp-base-carousel/1.0/amp-base-carousel.js
index bfaed8479ccb..149bc5842b2d 100644
--- a/extensions/amp-base-carousel/1.0/amp-base-carousel.js
+++ b/extensions/amp-base-carousel/1.0/amp-base-carousel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {BaseElement} from './base-element';
 import {CSS} from '../../../build/amp-base-carousel-1.0.css';
diff --git a/extensions/amp-base-carousel/1.0/arrow.js b/extensions/amp-base-carousel/1.0/arrow.js
index c2cc1e02ad6d..06d4d50914e6 100644
--- a/extensions/amp-base-carousel/1.0/arrow.js
+++ b/extensions/amp-base-carousel/1.0/arrow.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {useCallback} from '#preact';
 import {useStyles} from './component.jss';
diff --git a/extensions/amp-base-carousel/1.0/base-element.js b/extensions/amp-base-carousel/1.0/base-element.js
index f9815db46ee7..1a90b53d901e 100644
--- a/extensions/amp-base-carousel/1.0/base-element.js
+++ b/extensions/amp-base-carousel/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BaseCarousel} from './component';
 import {CSS as COMPONENT_CSS} from './component.jss';
 import {CarouselContextProp} from './carousel-props';
diff --git a/extensions/amp-base-carousel/1.0/carousel-context.js b/extensions/amp-base-carousel/1.0/carousel-context.js
index 07d0762b7705..541c6d812330 100644
--- a/extensions/amp-base-carousel/1.0/carousel-context.js
+++ b/extensions/amp-base-carousel/1.0/carousel-context.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {createContext} from '#preact';
 
 const CarouselContext = createContext(
diff --git a/extensions/amp-base-carousel/1.0/carousel-props.js b/extensions/amp-base-carousel/1.0/carousel-props.js
index aaf98743691d..cff3ad7467b5 100644
--- a/extensions/amp-base-carousel/1.0/carousel-props.js
+++ b/extensions/amp-base-carousel/1.0/carousel-props.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CarouselContext} from './carousel-context';
 import {contextProp} from '#core/context';
 
diff --git a/extensions/amp-base-carousel/1.0/component.js b/extensions/amp-base-carousel/1.0/component.js
index 052b4c363d92..4e23eb2cf211 100644
--- a/extensions/amp-base-carousel/1.0/component.js
+++ b/extensions/amp-base-carousel/1.0/component.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import * as Preact from '#preact';
 import {
   Alignment,
diff --git a/extensions/amp-base-carousel/1.0/component.jss.js b/extensions/amp-base-carousel/1.0/component.jss.js
index 84ad5d51b8cf..56825385d720 100644
--- a/extensions/amp-base-carousel/1.0/component.jss.js
+++ b/extensions/amp-base-carousel/1.0/component.jss.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createUseStyles} from 'react-jss';
 
 const carousel = {
diff --git a/extensions/amp-base-carousel/1.0/component.type.js b/extensions/amp-base-carousel/1.0/component.type.js
index c7368a705381..c3f49d357672 100644
--- a/extensions/amp-base-carousel/1.0/component.type.js
+++ b/extensions/amp-base-carousel/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-base-carousel/1.0/dimensions.js b/extensions/amp-base-carousel/1.0/dimensions.js
index b61838166e85..a19edc449fae 100644
--- a/extensions/amp-base-carousel/1.0/dimensions.js
+++ b/extensions/amp-base-carousel/1.0/dimensions.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {mod} from '#core/math';
 
 /**
diff --git a/extensions/amp-base-carousel/1.0/scroller.js b/extensions/amp-base-carousel/1.0/scroller.js
index a765a0db25ab..01b1bca71898 100644
--- a/extensions/amp-base-carousel/1.0/scroller.js
+++ b/extensions/amp-base-carousel/1.0/scroller.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import * as Preact from '#preact';
 import {
   Alignment,
diff --git a/extensions/amp-base-carousel/1.0/storybook/Basic.amp.js b/extensions/amp-base-carousel/1.0/storybook/Basic.amp.js
index f8fc84912d03..3d3a4f6d05d0 100644
--- a/extensions/amp-base-carousel/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-base-carousel/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {boolean, number, select, text, withKnobs} from '@storybook/addon-knobs';
 import {withAmp} from '@ampproject/storybook-addon';
diff --git a/extensions/amp-base-carousel/1.0/storybook/Basic.js b/extensions/amp-base-carousel/1.0/storybook/Basic.js
index f30a4f5b02eb..f5207dc79d77 100644
--- a/extensions/amp-base-carousel/1.0/storybook/Basic.js
+++ b/extensions/amp-base-carousel/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {BaseCarousel} from '../component';
 import {boolean, number, select, withKnobs} from '@storybook/addon-knobs';
diff --git a/extensions/amp-base-carousel/1.0/test-e2e/helpers.js b/extensions/amp-base-carousel/1.0/test-e2e/helpers.js
index 3bdf4674b0e5..0af68f13dc91 100644
--- a/extensions/amp-base-carousel/1.0/test-e2e/helpers.js
+++ b/extensions/amp-base-carousel/1.0/test-e2e/helpers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const TAG_NAME = 'amp-base-carousel';
 const SLIDE_CLASS = 'slideElement';
 const SCROLLER_CLASS = 'hideScrollbar';
diff --git a/extensions/amp-base-carousel/1.0/test-e2e/test-advance.js b/extensions/amp-base-carousel/1.0/test-e2e/test-advance.js
index 8ad20004f6d1..83d10570421e 100644
--- a/extensions/amp-base-carousel/1.0/test-e2e/test-advance.js
+++ b/extensions/amp-base-carousel/1.0/test-e2e/test-advance.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getCarousel, getNextArrow, getPrevArrow, getSlides} from './helpers';
 import {sleep} from '#testing/helpers';
 import {useStyles} from '../component.jss';
diff --git a/extensions/amp-base-carousel/1.0/test-e2e/test-arrows-non-looping.js b/extensions/amp-base-carousel/1.0/test-e2e/test-arrows-non-looping.js
index 07cfe0b16276..1c761f30512b 100644
--- a/extensions/amp-base-carousel/1.0/test-e2e/test-arrows-non-looping.js
+++ b/extensions/amp-base-carousel/1.0/test-e2e/test-arrows-non-looping.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   getCarousel,
   getNextArrow,
diff --git a/extensions/amp-base-carousel/1.0/test-e2e/test-arrows.js b/extensions/amp-base-carousel/1.0/test-e2e/test-arrows.js
index 8fd81ed12ca7..e3be5e7e5f7c 100644
--- a/extensions/amp-base-carousel/1.0/test-e2e/test-arrows.js
+++ b/extensions/amp-base-carousel/1.0/test-e2e/test-arrows.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   getCarousel,
   getNextArrowSlot,
diff --git a/extensions/amp-base-carousel/1.0/test-e2e/test-autoadvance.js b/extensions/amp-base-carousel/1.0/test-e2e/test-autoadvance.js
index eb8c85f76cf5..d76d28a68718 100644
--- a/extensions/amp-base-carousel/1.0/test-e2e/test-autoadvance.js
+++ b/extensions/amp-base-carousel/1.0/test-e2e/test-autoadvance.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getCarousel, getSlides} from './helpers';
 import {afterRenderPromise, sleep} from '#testing/helpers';
 import {useStyles} from '../component.jss';
diff --git a/extensions/amp-base-carousel/1.0/test-e2e/test-component.js b/extensions/amp-base-carousel/1.0/test-e2e/test-component.js
index 4e25d49ad14e..477b775c732f 100644
--- a/extensions/amp-base-carousel/1.0/test-e2e/test-component.js
+++ b/extensions/amp-base-carousel/1.0/test-e2e/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getCarousel, getScrollingElement, getSlide, getSlides} from './helpers';
 import {useStyles} from '../component.jss';
 
diff --git a/extensions/amp-base-carousel/1.0/test-e2e/test-grouping.js b/extensions/amp-base-carousel/1.0/test-e2e/test-grouping.js
index 1f0f32a20430..7c4c473f7d05 100644
--- a/extensions/amp-base-carousel/1.0/test-e2e/test-grouping.js
+++ b/extensions/amp-base-carousel/1.0/test-e2e/test-grouping.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getCarousel, getScrollingElement, getSlide} from './helpers';
 import {useStyles} from '../component.jss';
 
diff --git a/extensions/amp-base-carousel/1.0/test-e2e/test-mixed-lengths-no-snap.js b/extensions/amp-base-carousel/1.0/test-e2e/test-mixed-lengths-no-snap.js
index 4efa9cbcf142..5f33dab79f4a 100644
--- a/extensions/amp-base-carousel/1.0/test-e2e/test-mixed-lengths-no-snap.js
+++ b/extensions/amp-base-carousel/1.0/test-e2e/test-mixed-lengths-no-snap.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getCarousel, getScrollingElement, getSlide} from './helpers';
 import {useStyles} from '../component.jss';
 
diff --git a/extensions/amp-base-carousel/1.0/test-e2e/test-mixed-lengths.js b/extensions/amp-base-carousel/1.0/test-e2e/test-mixed-lengths.js
index 749bbdb0be08..2c7d15a40181 100644
--- a/extensions/amp-base-carousel/1.0/test-e2e/test-mixed-lengths.js
+++ b/extensions/amp-base-carousel/1.0/test-e2e/test-mixed-lengths.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getCarousel, getScrollingElement, getSlide} from './helpers';
 import {useStyles} from '../component.jss';
 
diff --git a/extensions/amp-base-carousel/1.0/test-e2e/test-non-looping.js b/extensions/amp-base-carousel/1.0/test-e2e/test-non-looping.js
index c2ad4f159acd..1ff2d4cff349 100644
--- a/extensions/amp-base-carousel/1.0/test-e2e/test-non-looping.js
+++ b/extensions/amp-base-carousel/1.0/test-e2e/test-non-looping.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getCarousel, getScrollingElement, getSlide} from './helpers';
 import {useStyles} from '../component.jss';
 
diff --git a/extensions/amp-base-carousel/1.0/test-e2e/test-responsive.js b/extensions/amp-base-carousel/1.0/test-e2e/test-responsive.js
index d55eb1f241f1..fb73238cf454 100644
--- a/extensions/amp-base-carousel/1.0/test-e2e/test-responsive.js
+++ b/extensions/amp-base-carousel/1.0/test-e2e/test-responsive.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {sleep} from '#testing/helpers';
 import {getCarousel, getScrollingElement, getSlide} from './helpers';
 import {useStyles} from '../component.jss';
diff --git a/extensions/amp-base-carousel/1.0/test-e2e/test-rtl.js b/extensions/amp-base-carousel/1.0/test-e2e/test-rtl.js
index ef450a7d45ff..4a2eca40d3c8 100644
--- a/extensions/amp-base-carousel/1.0/test-e2e/test-rtl.js
+++ b/extensions/amp-base-carousel/1.0/test-e2e/test-rtl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getCarousel, getNextArrow, getPrevArrow, getSlide} from './helpers';
 import {useStyles} from '../component.jss';
 
diff --git a/extensions/amp-base-carousel/1.0/test-e2e/test-vertical.js b/extensions/amp-base-carousel/1.0/test-e2e/test-vertical.js
index 6252ac406a86..26474bff18a9 100644
--- a/extensions/amp-base-carousel/1.0/test-e2e/test-vertical.js
+++ b/extensions/amp-base-carousel/1.0/test-e2e/test-vertical.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getCarousel, getScrollingElement, getSlide} from './helpers';
 import {useStyles} from '../component.jss';
 
diff --git a/extensions/amp-base-carousel/1.0/test/test-amp-base-carousel.js b/extensions/amp-base-carousel/1.0/test/test-amp-base-carousel.js
index 358f1a27f942..88794761daf0 100644
--- a/extensions/amp-base-carousel/1.0/test/test-amp-base-carousel.js
+++ b/extensions/amp-base-carousel/1.0/test/test-amp-base-carousel.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import '../amp-base-carousel';
 import {ActionInvocation} from '#service/action-impl';
 import {ActionTrust} from '#core/constants/action-constants';
diff --git a/extensions/amp-base-carousel/1.0/test/test-component.js b/extensions/amp-base-carousel/1.0/test/test-component.js
index 69b2888583df..43f62a389c08 100644
--- a/extensions/amp-base-carousel/1.0/test/test-component.js
+++ b/extensions/amp-base-carousel/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {BaseCarousel} from '../component';
 import {mount} from 'enzyme';
diff --git a/extensions/amp-base-carousel/amp-base-carousel.md b/extensions/amp-base-carousel/amp-base-carousel.md
index 22498ed87ed6..ce598ef6c915 100644
--- a/extensions/amp-base-carousel/amp-base-carousel.md
+++ b/extensions/amp-base-carousel/amp-base-carousel.md
@@ -8,22 +8,6 @@ experimental: true
 bento: true
 ---
 
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-base-carousel
 
 ## Usage
diff --git a/extensions/amp-beopinion/0.1/amp-beopinion.js b/extensions/amp-beopinion/0.1/amp-beopinion.js
index 22c5b5be6b56..100829ae4ee2 100644
--- a/extensions/amp-beopinion/0.1/amp-beopinion.js
+++ b/extensions/amp-beopinion/0.1/amp-beopinion.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeElement} from '#core/dom';
 import {applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
 
diff --git a/extensions/amp-beopinion/0.1/test/test-amp-beopinion.js b/extensions/amp-beopinion/0.1/test/test-amp-beopinion.js
index c4526197f055..d7bfb5474918 100644
--- a/extensions/amp-beopinion/0.1/test/test-amp-beopinion.js
+++ b/extensions/amp-beopinion/0.1/test/test-amp-beopinion.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-beopinion';
 import {beopinion} from '#3p/beopinion';
 
diff --git a/extensions/amp-beopinion/amp-beopinion.md b/extensions/amp-beopinion/amp-beopinion.md
index a7ea65648f3a..7ae7be857b74 100644
--- a/extensions/amp-beopinion/amp-beopinion.md
+++ b/extensions/amp-beopinion/amp-beopinion.md
@@ -6,22 +6,6 @@ teaser:
   text: Embeds BeOpinion content.
 ---
 
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-beopinion
 
 ## Usage
diff --git a/extensions/amp-bind/0.1/amp-bind-macro.js b/extensions/amp-bind/0.1/amp-bind-macro.js
index 9d0fe76f715d..0a90d75fe669 100644
--- a/extensions/amp-bind/0.1/amp-bind-macro.js
+++ b/extensions/amp-bind/0.1/amp-bind-macro.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {LayoutPriority} from '#core/dom/layout';
 
 /**
diff --git a/extensions/amp-bind/0.1/amp-bind.js b/extensions/amp-bind/0.1/amp-bind.js
index 1ae87c23fda5..68b10ce18883 100644
--- a/extensions/amp-bind/0.1/amp-bind.js
+++ b/extensions/amp-bind/0.1/amp-bind.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpBindMacro} from './amp-bind-macro';
 import {AmpState} from './amp-state';
 import {Bind} from './bind-impl';
diff --git a/extensions/amp-bind/0.1/amp-state.js b/extensions/amp-bind/0.1/amp-state.js
index 2d7a3fc851e4..4cfe28c45b0a 100644
--- a/extensions/amp-bind/0.1/amp-state.js
+++ b/extensions/amp-bind/0.1/amp-state.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {Deferred} from '#core/data-structures/promise';
 import {isJsonScriptTag} from '#core/dom';
diff --git a/extensions/amp-bind/0.1/bind-evaluator.js b/extensions/amp-bind/0.1/bind-evaluator.js
index 87521cfaaff8..5c47ea1e495c 100644
--- a/extensions/amp-bind/0.1/bind-evaluator.js
+++ b/extensions/amp-bind/0.1/bind-evaluator.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {remove} from '#core/types/array';
 
 import {BindExpression} from './bind-expression';
diff --git a/extensions/amp-bind/0.1/bind-events.js b/extensions/amp-bind/0.1/bind-events.js
index b0568d2a9f19..4fc5a1694088 100644
--- a/extensions/amp-bind/0.1/bind-events.js
+++ b/extensions/amp-bind/0.1/bind-events.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * TODO(choumx, #19657): Remove/replace with DOM polling in integration tests.
  * @enum {string}
diff --git a/extensions/amp-bind/0.1/bind-expr-defines.js b/extensions/amp-bind/0.1/bind-expr-defines.js
index d3e6ca6a4518..7a433d5c63e7 100644
--- a/extensions/amp-bind/0.1/bind-expr-defines.js
+++ b/extensions/amp-bind/0.1/bind-expr-defines.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * A single node in the AST of a `BindExpression`.
  * @struct
diff --git a/extensions/amp-bind/0.1/bind-expression.js b/extensions/amp-bind/0.1/bind-expression.js
index 3f2a7f026a25..06bcaa5c43d9 100644
--- a/extensions/amp-bind/0.1/bind-expression.js
+++ b/extensions/amp-bind/0.1/bind-expression.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {bindParser as parser} from '#build/parsers/bind-expr-impl';
 
 import {isArray, isObject} from '#core/types';
diff --git a/extensions/amp-bind/0.1/bind-impl.js b/extensions/amp-bind/0.1/bind-impl.js
index 64e613c04a35..c5559e4d8cb6 100644
--- a/extensions/amp-bind/0.1/bind-impl.js
+++ b/extensions/amp-bind/0.1/bind-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {RAW_OBJECT_ARGS_KEY} from '#core/constants/action-constants';
 import {AmpEvents} from '#core/constants/amp-events';
 import {Deferred} from '#core/data-structures/promise';
diff --git a/extensions/amp-bind/0.1/bind-macro.js b/extensions/amp-bind/0.1/bind-macro.js
index 02ad255534c5..bd7df1970689 100644
--- a/extensions/amp-bind/0.1/bind-macro.js
+++ b/extensions/amp-bind/0.1/bind-macro.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BindExpression} from './bind-expression';
 
 /**
diff --git a/extensions/amp-bind/0.1/bind-validator.js b/extensions/amp-bind/0.1/bind-validator.js
index f0f902c7a437..f31d1acd5177 100644
--- a/extensions/amp-bind/0.1/bind-validator.js
+++ b/extensions/amp-bind/0.1/bind-validator.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseSrcset} from '#core/dom/srcset';
 import {hasOwn, ownProperty} from '#core/types/object';
 
diff --git a/extensions/amp-bind/0.1/test/integration/test-bind-impl.js b/extensions/amp-bind/0.1/test/integration/test-bind-impl.js
index 405cc350174c..8dd8983fdd4a 100644
--- a/extensions/amp-bind/0.1/test/integration/test-bind-impl.js
+++ b/extensions/amp-bind/0.1/test/integration/test-bind-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview "Unit" test for bind-impl.js. Runs as an integration test
  * because it requires building web-worker binary.
diff --git a/extensions/amp-bind/0.1/test/test-amp-state.js b/extensions/amp-bind/0.1/test/test-amp-state.js
index 457dc6b0ee4c..1a41108415ef 100644
--- a/extensions/amp-bind/0.1/test/test-amp-state.js
+++ b/extensions/amp-bind/0.1/test/test-amp-state.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-bind';
 import {ActionTrust} from '#core/constants/action-constants';
 
diff --git a/extensions/amp-bind/0.1/test/test-bind-evaluator.js b/extensions/amp-bind/0.1/test/test-bind-evaluator.js
index 5a181811d5dd..0aa4af541d50 100644
--- a/extensions/amp-bind/0.1/test/test-bind-evaluator.js
+++ b/extensions/amp-bind/0.1/test/test-bind-evaluator.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BindEvaluator} from '../bind-evaluator';
 import {BindExpression} from '../bind-expression';
 
diff --git a/extensions/amp-bind/0.1/test/test-bind-expression.js b/extensions/amp-bind/0.1/test/test-bind-expression.js
index 9e344807cbf4..e6a7c1dde525 100644
--- a/extensions/amp-bind/0.1/test/test-bind-expression.js
+++ b/extensions/amp-bind/0.1/test/test-bind-expression.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BindExpression} from '../bind-expression';
 import {BindMacro} from '../bind-macro';
 
diff --git a/extensions/amp-bind/0.1/test/test-bind-validator.js b/extensions/amp-bind/0.1/test/test-bind-validator.js
index 23f20e24a127..6a060004dae3 100644
--- a/extensions/amp-bind/0.1/test/test-bind-validator.js
+++ b/extensions/amp-bind/0.1/test/test-bind-validator.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BindValidator} from '../bind-validator';
 
 describes.sandboxed('BindValidator (allowUrlProperties=true)', {}, () => {
diff --git a/extensions/amp-bind/amp-bind.md b/extensions/amp-bind/amp-bind.md
index 9d9c40b7f2ab..e9e71955a797 100644
--- a/extensions/amp-bind/amp-bind.md
+++ b/extensions/amp-bind/amp-bind.md
@@ -8,22 +8,6 @@ teaser:
   text: Allows elements to mutate in response to user actions or data changes via data binding and simple JS-like expressions.
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-bind
 
 ## Usage
diff --git a/extensions/amp-bodymovin-animation/0.1/amp-bodymovin-animation.js b/extensions/amp-bodymovin-animation/0.1/amp-bodymovin-animation.js
index 65078610d133..e228b8586afd 100644
--- a/extensions/amp-bodymovin-animation/0.1/amp-bodymovin-animation.js
+++ b/extensions/amp-bodymovin-animation/0.1/amp-bodymovin-animation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {Deferred} from '#core/data-structures/promise';
 import {removeElement} from '#core/dom';
diff --git a/extensions/amp-bodymovin-animation/0.1/test/integration/test-amp-bodymovin-animation.js b/extensions/amp-bodymovin-animation/0.1/test/integration/test-amp-bodymovin-animation.js
index c689a6595e3f..a77ca5446738 100644
--- a/extensions/amp-bodymovin-animation/0.1/test/integration/test-amp-bodymovin-animation.js
+++ b/extensions/amp-bodymovin-animation/0.1/test/integration/test-amp-bodymovin-animation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.sandboxed
   .configure()
   .ifChrome()
diff --git a/extensions/amp-bodymovin-animation/amp-bodymovin-animation.md b/extensions/amp-bodymovin-animation/amp-bodymovin-animation.md
index f382f5085ace..38143398252a 100644
--- a/extensions/amp-bodymovin-animation/amp-bodymovin-animation.md
+++ b/extensions/amp-bodymovin-animation/amp-bodymovin-animation.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays an AirBnB Bodymovin animation player.
 ---
 
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-bodymovin-animation
 
 ## Usage
diff --git a/extensions/amp-brid-player/0.1/amp-brid-player.js b/extensions/amp-brid-player/0.1/amp-brid-player.js
index 48873d12f0eb..3d9d5a52af81 100644
--- a/extensions/amp-brid-player/0.1/amp-brid-player.js
+++ b/extensions/amp-brid-player/0.1/amp-brid-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CONSENT_POLICY_STATE} from '#core/constants/consent-state';
 import {Deferred} from '#core/data-structures/promise';
 import {dispatchCustomEvent, removeElement} from '#core/dom';
diff --git a/extensions/amp-brid-player/0.1/test/test-amp-brid-player.js b/extensions/amp-brid-player/0.1/test/test-amp-brid-player.js
index d5935a6beb08..b343e182fcc2 100644
--- a/extensions/amp-brid-player/0.1/test/test-amp-brid-player.js
+++ b/extensions/amp-brid-player/0.1/test/test-amp-brid-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-brid-player';
 import {Services} from '#service';
 
diff --git a/extensions/amp-brid-player/amp-brid-player.md b/extensions/amp-brid-player/amp-brid-player.md
index bdb90d9d1604..ee23adfe18e2 100644
--- a/extensions/amp-brid-player/amp-brid-player.md
+++ b/extensions/amp-brid-player/amp-brid-player.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays a Brid.tv player.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-brid-player
 
 An `amp-brid-player` displays the Brid Player used in [Brid.tv](https://www.brid.tv/) Video Platform.
diff --git a/extensions/amp-brightcove/0.1/amp-brightcove.js b/extensions/amp-brightcove/0.1/amp-brightcove.js
index d7cfc2170e6a..0d330a2127e5 100644
--- a/extensions/amp-brightcove/0.1/amp-brightcove.js
+++ b/extensions/amp-brightcove/0.1/amp-brightcove.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {PauseHelper} from '#core/dom/video/pause-helper';
 import {Services} from '#service';
diff --git a/extensions/amp-brightcove/0.1/test/test-amp-brightcove.js b/extensions/amp-brightcove/0.1/test/test-amp-brightcove.js
index bf39f5158fa5..2273535bd6a8 100644
--- a/extensions/amp-brightcove/0.1/test/test-amp-brightcove.js
+++ b/extensions/amp-brightcove/0.1/test/test-amp-brightcove.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-brightcove';
 import * as consent from '../../../../src/consent';
 import {BaseElement} from '../../../../src/base-element';
diff --git a/extensions/amp-brightcove/1.0/amp-brightcove.css b/extensions/amp-brightcove/1.0/amp-brightcove.css
index fa740ff3e231..3119df77a745 100644
--- a/extensions/amp-brightcove/1.0/amp-brightcove.css
+++ b/extensions/amp-brightcove/1.0/amp-brightcove.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * Pre-upgrade:
diff --git a/extensions/amp-brightcove/1.0/amp-brightcove.js b/extensions/amp-brightcove/1.0/amp-brightcove.js
index 9b81da816721..227803b6a529 100644
--- a/extensions/amp-brightcove/1.0/amp-brightcove.js
+++ b/extensions/amp-brightcove/1.0/amp-brightcove.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   getConsentPolicyInfo,
   getConsentPolicySharedData,
diff --git a/extensions/amp-brightcove/1.0/base-element.js b/extensions/amp-brightcove/1.0/base-element.js
index f8f69655a1ac..5681771963e3 100644
--- a/extensions/amp-brightcove/1.0/base-element.js
+++ b/extensions/amp-brightcove/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Brightcove} from './component';
 import {VideoBaseElement} from '../../amp-video/1.0/video-base-element';
 
diff --git a/extensions/amp-brightcove/1.0/component.js b/extensions/amp-brightcove/1.0/component.js
index de01305ee8aa..bce8a682b495 100644
--- a/extensions/amp-brightcove/1.0/component.js
+++ b/extensions/amp-brightcove/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {useCallback, useMemo, useRef, useState} from '#preact';
 import {forwardRef} from '#preact/compat';
diff --git a/extensions/amp-brightcove/1.0/component.type.js b/extensions/amp-brightcove/1.0/component.type.js
index cba25539e310..8eb21bb3c5a6 100644
--- a/extensions/amp-brightcove/1.0/component.type.js
+++ b/extensions/amp-brightcove/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-brightcove/1.0/storybook/Basic.amp.js b/extensions/amp-brightcove/1.0/storybook/Basic.amp.js
index e3058e62e35e..58789ec1e8f4 100644
--- a/extensions/amp-brightcove/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-brightcove/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {withAmp} from '@ampproject/storybook-addon';
 import {withKnobs} from '@storybook/addon-knobs';
diff --git a/extensions/amp-brightcove/1.0/storybook/Basic.js b/extensions/amp-brightcove/1.0/storybook/Basic.js
index 935592307f3c..01a2574e2df7 100644
--- a/extensions/amp-brightcove/1.0/storybook/Basic.js
+++ b/extensions/amp-brightcove/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {Brightcove} from '../component';
 import {withKnobs} from '@storybook/addon-knobs';
diff --git a/extensions/amp-brightcove/1.0/test/test-amp-brightcove.js b/extensions/amp-brightcove/1.0/test/test-amp-brightcove.js
index 0ee05de1b870..2dc19a4b1547 100644
--- a/extensions/amp-brightcove/1.0/test/test-amp-brightcove.js
+++ b/extensions/amp-brightcove/1.0/test/test-amp-brightcove.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as consent from '../../../../src/consent';
 import '../amp-brightcove';
 import {toggleExperiment} from '#experiments';
diff --git a/extensions/amp-brightcove/1.0/test/test-component.js b/extensions/amp-brightcove/1.0/test/test-component.js
index 35b94419b842..743cf1a7084c 100644
--- a/extensions/amp-brightcove/1.0/test/test-component.js
+++ b/extensions/amp-brightcove/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {Brightcove} from '../component';
 import {mount} from 'enzyme';
diff --git a/extensions/amp-brightcove/brightcove-api.js b/extensions/amp-brightcove/brightcove-api.js
index 6f4362ed3fa8..79c5af260245 100644
--- a/extensions/amp-brightcove/brightcove-api.js
+++ b/extensions/amp-brightcove/brightcove-api.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {addParamsToUrl} from '../../src/url';
 import {VideoEvents} from '../../src/video-interface';
 
diff --git a/extensions/amp-byside-content/0.1/amp-byside-content.css b/extensions/amp-byside-content/0.1/amp-byside-content.css
index f98941fb819c..09b01bd51c8d 100644
--- a/extensions/amp-byside-content/0.1/amp-byside-content.css
+++ b/extensions/amp-byside-content/0.1/amp-byside-content.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .i-amphtml-byside-content-overflow {
 	display: flex;
diff --git a/extensions/amp-byside-content/0.1/amp-byside-content.js b/extensions/amp-byside-content/0.1/amp-byside-content.js
index bc0cba8755fb..f59daef41252 100644
--- a/extensions/amp-byside-content/0.1/amp-byside-content.js
+++ b/extensions/amp-byside-content/0.1/amp-byside-content.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Displays BySide placeholder content.
  * The client settings and placeholder content label should be added as
diff --git a/extensions/amp-byside-content/0.1/test/test-amp-byside-content.js b/extensions/amp-byside-content/0.1/test/test-amp-byside-content.js
index 8a29c59b2563..e730b988bcef 100644
--- a/extensions/amp-byside-content/0.1/test/test-amp-byside-content.js
+++ b/extensions/amp-byside-content/0.1/test/test-amp-byside-content.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-byside-content';
 import {mockServiceForDoc} from '#testing/test-helper';
 
diff --git a/extensions/amp-cache-url/0.1/amp-cache-url.js b/extensions/amp-cache-url/0.1/amp-cache-url.js
index 4aa5faa4d3be..c6fc0e087f61 100644
--- a/extensions/amp-cache-url/0.1/amp-cache-url.js
+++ b/extensions/amp-cache-url/0.1/amp-cache-url.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as ampToolboxCacheUrl from '@ampproject/toolbox-cache-url';
 
 import {urls} from '../../../src/config';
diff --git a/extensions/amp-cache-url/0.1/test/test-amp-cache-url.js b/extensions/amp-cache-url/0.1/test/test-amp-cache-url.js
index 5a6c4a8c3936..dd7d47b090b6 100644
--- a/extensions/amp-cache-url/0.1/test/test-amp-cache-url.js
+++ b/extensions/amp-cache-url/0.1/test/test-amp-cache-url.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpCacheUrlService} from '../amp-cache-url';
 
 describes.fakeWin(
diff --git a/extensions/amp-call-tracking/0.1/amp-call-tracking.js b/extensions/amp-call-tracking/0.1/amp-call-tracking.js
index 71901a7156a3..da92cb62e9f1 100644
--- a/extensions/amp-call-tracking/0.1/amp-call-tracking.js
+++ b/extensions/amp-call-tracking/0.1/amp-call-tracking.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Layout, isLayoutSizeDefined} from '#core/dom/layout';
 
 import {Services} from '#service';
diff --git a/extensions/amp-call-tracking/0.1/test/test-amp-call-tracking.js b/extensions/amp-call-tracking/0.1/test/test-amp-call-tracking.js
index e2d4b78dc6c5..cad94457b475 100644
--- a/extensions/amp-call-tracking/0.1/test/test-amp-call-tracking.js
+++ b/extensions/amp-call-tracking/0.1/test/test-amp-call-tracking.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-call-tracking';
 import {realChildElements} from '#core/dom/query';
 
diff --git a/extensions/amp-call-tracking/amp-call-tracking.md b/extensions/amp-call-tracking/amp-call-tracking.md
index 6ca90b002b71..b95da5f97485 100644
--- a/extensions/amp-call-tracking/amp-call-tracking.md
+++ b/extensions/amp-call-tracking/amp-call-tracking.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays GL Transmission Format (gITF) 3D models.
 ---
 
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-call-tracking
 
 ## Usage
diff --git a/extensions/amp-carousel/0.1/amp-carousel.js b/extensions/amp-carousel/0.1/amp-carousel.js
index 87f9da0c0678..c3f9685b7a34 100644
--- a/extensions/amp-carousel/0.1/amp-carousel.js
+++ b/extensions/amp-carousel/0.1/amp-carousel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpScrollableCarousel} from './scrollable-carousel';
 import {AmpSlideScroll} from './slidescroll';
 import {CSS} from '../../../build/amp-carousel-0.1.css';
diff --git a/extensions/amp-carousel/0.1/amp-carousel.md b/extensions/amp-carousel/0.1/amp-carousel.md
index 514a9aa159fa..c175d114cae1 100644
--- a/extensions/amp-carousel/0.1/amp-carousel.md
+++ b/extensions/amp-carousel/0.1/amp-carousel.md
@@ -8,22 +8,6 @@ teaser:
   text: Displays multiple similar pieces of content along a horizontal axis.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-carousel
 
 A generic carousel for displaying multiple similar pieces of content along a horizontal axis; meant to be highly flexible and performant.
diff --git a/extensions/amp-carousel/0.1/base-carousel.js b/extensions/amp-carousel/0.1/base-carousel.js
index 4239e7a333d4..91cc44a8c49e 100644
--- a/extensions/amp-carousel/0.1/base-carousel.js
+++ b/extensions/amp-carousel/0.1/base-carousel.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Keys} from '#core/constants/key-codes';
 import {Services} from '#service';
 import {isAmp4Email} from '../../../src/format';
diff --git a/extensions/amp-carousel/0.1/scrollable-carousel.js b/extensions/amp-carousel/0.1/scrollable-carousel.js
index ced00d6d9d82..53de4f103c8f 100644
--- a/extensions/amp-carousel/0.1/scrollable-carousel.js
+++ b/extensions/amp-carousel/0.1/scrollable-carousel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {Animation} from '../../../src/animation';
 import {BaseCarousel} from './base-carousel';
diff --git a/extensions/amp-carousel/0.1/slidescroll.js b/extensions/amp-carousel/0.1/slidescroll.js
index 93cb9e2f8af4..987aae12e94f 100644
--- a/extensions/amp-carousel/0.1/slidescroll.js
+++ b/extensions/amp-carousel/0.1/slidescroll.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {Animation} from '../../../src/animation';
 import {dev, user, userAssert} from '../../../src/log';
diff --git a/extensions/amp-carousel/0.1/test-e2e/test-hidden-controls.js b/extensions/amp-carousel/0.1/test-e2e/test-hidden-controls.js
index 9fd89a230c3b..77dcdd3c7612 100644
--- a/extensions/amp-carousel/0.1/test-e2e/test-hidden-controls.js
+++ b/extensions/amp-carousel/0.1/test-e2e/test-hidden-controls.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'AMP carousel 0.1 buttons with hidden controls',
   {
diff --git a/extensions/amp-carousel/0.1/test-e2e/test-slidescroll-autoplay.js b/extensions/amp-carousel/0.1/test-e2e/test-slidescroll-autoplay.js
index 545bd3c4dac8..d9e58ba90d64 100644
--- a/extensions/amp-carousel/0.1/test-e2e/test-slidescroll-autoplay.js
+++ b/extensions/amp-carousel/0.1/test-e2e/test-slidescroll-autoplay.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'AMP carousel 0.1 slideChange on type="slide" with autoplay',
   {
diff --git a/extensions/amp-carousel/0.1/test/test-scrollable-carousel.js b/extensions/amp-carousel/0.1/test/test-scrollable-carousel.js
index c0b254a20b91..62a804406eee 100644
--- a/extensions/amp-carousel/0.1/test/test-scrollable-carousel.js
+++ b/extensions/amp-carousel/0.1/test/test-scrollable-carousel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-carousel';
 import {ActionService} from '#service/action-impl';
 import {ActionTrust} from '#core/constants/action-constants';
diff --git a/extensions/amp-carousel/0.1/test/test-slidescroll-slides.js b/extensions/amp-carousel/0.1/test/test-slidescroll-slides.js
index 8aaaae050370..aadf34a53da8 100644
--- a/extensions/amp-carousel/0.1/test/test-slidescroll-slides.js
+++ b/extensions/amp-carousel/0.1/test/test-slidescroll-slides.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpSlideScroll} from '../slidescroll';
 
 describes.fakeWin('AmpSlideScroll', {amp: true}, (env) => {
diff --git a/extensions/amp-carousel/0.1/test/test-slidescroll.js b/extensions/amp-carousel/0.1/test/test-slidescroll.js
index 952e25109e77..a9743fc952b7 100644
--- a/extensions/amp-carousel/0.1/test/test-slidescroll.js
+++ b/extensions/amp-carousel/0.1/test/test-slidescroll.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-carousel';
 import {ActionService} from '#service/action-impl';
 import {ActionTrust} from '#core/constants/action-constants';
diff --git a/extensions/amp-carousel/0.2/amp-carousel.css b/extensions/amp-carousel/0.2/amp-carousel.css
index bd40e1225bb0..66a2662e6368 100644
--- a/extensions/amp-carousel/0.2/amp-carousel.css
+++ b/extensions/amp-carousel/0.2/amp-carousel.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import '../../amp-base-carousel/0.1/carousel.css';
 
diff --git a/extensions/amp-carousel/0.2/amp-carousel.js b/extensions/amp-carousel/0.2/amp-carousel.js
index d6d0b78bd0a6..d9d09ade58f0 100644
--- a/extensions/amp-carousel/0.2/amp-carousel.js
+++ b/extensions/amp-carousel/0.2/amp-carousel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionSource} from '../../amp-base-carousel/0.1/action-source';
 import {ActionTrust} from '#core/constants/action-constants';
 import {CSS} from '../../../build/amp-carousel-0.2.css';
diff --git a/extensions/amp-carousel/0.2/test/test-e2e/helpers.js b/extensions/amp-carousel/0.2/test/test-e2e/helpers.js
index 1f4825fea5da..e0204859f33b 100644
--- a/extensions/amp-carousel/0.2/test/test-e2e/helpers.js
+++ b/extensions/amp-carousel/0.2/test/test-e2e/helpers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const TAG_NAME = 'amp-carousel';
 const SCROLLABLE_SLIDE = 'amp-scrollable-carousel-slide';
 const NEXT_ARROW_SELECTOR = `.amp-carousel-button.amp-carousel-button-next`;
diff --git a/extensions/amp-carousel/0.2/test/test-e2e/test-arrows-in-lightbox.js b/extensions/amp-carousel/0.2/test/test-e2e/test-arrows-in-lightbox.js
index 04462e3d4232..84f821699bab 100644
--- a/extensions/amp-carousel/0.2/test/test-e2e/test-arrows-in-lightbox.js
+++ b/extensions/amp-carousel/0.2/test/test-e2e/test-arrows-in-lightbox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp carousel:0.2 in lightbox',
   {
diff --git a/extensions/amp-carousel/0.2/test/test-e2e/test-repsonsive-slides.js b/extensions/amp-carousel/0.2/test/test-e2e/test-repsonsive-slides.js
index bf0ca7190542..6dddab33e78e 100644
--- a/extensions/amp-carousel/0.2/test/test-e2e/test-repsonsive-slides.js
+++ b/extensions/amp-carousel/0.2/test/test-e2e/test-repsonsive-slides.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getNextArrow, getSlides} from './helpers';
 import {afterRenderPromise} from '#testing/helpers';
 
diff --git a/extensions/amp-carousel/0.2/test/test-type-slides.js b/extensions/amp-carousel/0.2/test/test-type-slides.js
index 6b952f05f502..1ca041a8fbc4 100644
--- a/extensions/amp-carousel/0.2/test/test-type-slides.js
+++ b/extensions/amp-carousel/0.2/test/test-type-slides.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-carousel';
 import * as Listen from '../../../../src/event-helper';
 import {ActionTrust} from '#core/constants/action-constants';
diff --git a/extensions/amp-carousel/amp-carousel-analytics.md b/extensions/amp-carousel/amp-carousel-analytics.md
index 47ca86e0d41a..f30d5f9cc5eb 100644
--- a/extensions/amp-carousel/amp-carousel-analytics.md
+++ b/extensions/amp-carousel/amp-carousel-analytics.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP Carousel and Analytics
 
 ## Carousel (slides) triggers
diff --git a/extensions/amp-carousel/amp-carousel.md b/extensions/amp-carousel/amp-carousel.md
index 9cf1cf584caf..9bb6efa1c8e5 100644
--- a/extensions/amp-carousel/amp-carousel.md
+++ b/extensions/amp-carousel/amp-carousel.md
@@ -7,22 +7,6 @@ teaser:
   text: Displays multiple similar pieces of content along a horizontal axis.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-carousel
 
 ## Usage
diff --git a/extensions/amp-connatix-player/0.1/amp-connatix-player.js b/extensions/amp-connatix-player/0.1/amp-connatix-player.js
index b9a0163e6c47..60bd4bcea178 100644
--- a/extensions/amp-connatix-player/0.1/amp-connatix-player.js
+++ b/extensions/amp-connatix-player/0.1/amp-connatix-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   CONSENT_POLICY_STATE,
   CONSENT_STRING_TYPE,
diff --git a/extensions/amp-connatix-player/0.1/test/test-amp-connatix-player.js b/extensions/amp-connatix-player/0.1/test/test-amp-connatix-player.js
index c6b470cc8e24..4fe66af48536 100644
--- a/extensions/amp-connatix-player/0.1/test/test-amp-connatix-player.js
+++ b/extensions/amp-connatix-player/0.1/test/test-amp-connatix-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-connatix-player';
 
 describes.realWin(
diff --git a/extensions/amp-consent/0.1/amp-consent.css b/extensions/amp-consent/0.1/amp-consent.css
index a419ef80f68b..5a47c0919abb 100644
--- a/extensions/amp-consent/0.1/amp-consent.css
+++ b/extensions/amp-consent/0.1/amp-consent.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /**
  * @fileoverview Styling for the amp-consent
diff --git a/extensions/amp-consent/0.1/amp-consent.js b/extensions/amp-consent/0.1/amp-consent.js
index 1452702772bb..ba50233a85ed 100644
--- a/extensions/amp-consent/0.1/amp-consent.js
+++ b/extensions/amp-consent/0.1/amp-consent.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   CONSENT_ITEM_STATE,
   ConsentMetadataDef,
diff --git a/extensions/amp-consent/0.1/cmps.js b/extensions/amp-consent/0.1/cmps.js
index 40e9ca0f411f..37450948059a 100644
--- a/extensions/amp-consent/0.1/cmps.js
+++ b/extensions/amp-consent/0.1/cmps.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getMode} from '../../../src/mode';
 
 /**
diff --git a/extensions/amp-consent/0.1/consent-config.js b/extensions/amp-consent/0.1/consent-config.js
index 4838a0d92d91..83950c793595 100644
--- a/extensions/amp-consent/0.1/consent-config.js
+++ b/extensions/amp-consent/0.1/consent-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CMP_CONFIG} from './cmps';
 import {CONSENT_POLICY_STATE} from '#core/constants/consent-state';
 import {GEO_IN_GROUP} from '../../amp-geo/0.1/amp-geo-in-group';
diff --git a/extensions/amp-consent/0.1/consent-info.js b/extensions/amp-consent/0.1/consent-info.js
index e99992247c97..f9de81962271 100644
--- a/extensions/amp-consent/0.1/consent-info.js
+++ b/extensions/amp-consent/0.1/consent-info.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CONSENT_STRING_TYPE} from '#core/constants/consent-state';
 import {deepEquals} from '#core/types/object/json';
 import {dev, user} from '../../../src/log';
diff --git a/extensions/amp-consent/0.1/consent-policy-manager.js b/extensions/amp-consent/0.1/consent-policy-manager.js
index 168410a45708..d99ce09400d5 100644
--- a/extensions/amp-consent/0.1/consent-policy-manager.js
+++ b/extensions/amp-consent/0.1/consent-policy-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   CONSENT_ITEM_STATE,
   ConsentInfoDef,
diff --git a/extensions/amp-consent/0.1/consent-state-manager.js b/extensions/amp-consent/0.1/consent-state-manager.js
index 5ac2a4d43808..42d4e94741a7 100644
--- a/extensions/amp-consent/0.1/consent-state-manager.js
+++ b/extensions/amp-consent/0.1/consent-state-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   CONSENT_ITEM_STATE,
   ConsentInfoDef,
diff --git a/extensions/amp-consent/0.1/consent-ui.js b/extensions/amp-consent/0.1/consent-ui.js
index 36f2c1063876..0d61e5b14b0b 100644
--- a/extensions/amp-consent/0.1/consent-ui.js
+++ b/extensions/amp-consent/0.1/consent-ui.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {Services} from '#service';
 import {assertHttpsUrl} from '../../../src/url';
diff --git a/extensions/amp-consent/0.1/cookie-writer.js b/extensions/amp-consent/0.1/cookie-writer.js
index 51b6134f83b0..4a8fa73e2d6d 100644
--- a/extensions/amp-consent/0.1/cookie-writer.js
+++ b/extensions/amp-consent/0.1/cookie-writer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BASE_CID_MAX_AGE_MILLIS} from '#service/cid-impl';
 import {ConsentLinkerReader} from './linker-reader';
 import {Services} from '#service';
diff --git a/extensions/amp-consent/0.1/crc32.js b/extensions/amp-consent/0.1/crc32.js
index e98d3663fca6..f6f219546c6f 100644
--- a/extensions/amp-consent/0.1/crc32.js
+++ b/extensions/amp-consent/0.1/crc32.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {utf8Encode} from '#core/types/string/bytes';
 
 /**
diff --git a/extensions/amp-consent/0.1/linker-reader.js b/extensions/amp-consent/0.1/linker-reader.js
index ba6a7e758a72..3357fe9cf0a5 100644
--- a/extensions/amp-consent/0.1/linker-reader.js
+++ b/extensions/amp-consent/0.1/linker-reader.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {hasOwn} from '#core/types/object';
 import {parseLinker} from './linker';
 import {parseQueryString} from '#core/types/string/url';
diff --git a/extensions/amp-consent/0.1/linker.js b/extensions/amp-consent/0.1/linker.js
index d5895920e16e..c6c8970a57b6 100644
--- a/extensions/amp-consent/0.1/linker.js
+++ b/extensions/amp-consent/0.1/linker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {WindowInterface} from '#core/window/interface';
 import {
   base64UrlDecodeFromString,
diff --git a/extensions/amp-consent/0.1/tcf-api-command-manager.js b/extensions/amp-consent/0.1/tcf-api-command-manager.js
index 96adbe9baaf6..37841ff004c5 100644
--- a/extensions/amp-consent/0.1/tcf-api-command-manager.js
+++ b/extensions/amp-consent/0.1/tcf-api-command-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ConsentPolicyManager} from './consent-policy-manager'; // eslint-disable-line no-unused-vars
 import {TCF_POST_MESSAGE_API_COMMANDS} from './consent-info';
 import {hasOwn, map} from '#core/types/object';
diff --git a/extensions/amp-consent/0.1/test-e2e/common.js b/extensions/amp-consent/0.1/test-e2e/common.js
index 1569678e9b47..8aa8f9eb4e8a 100644
--- a/extensions/amp-consent/0.1/test-e2e/common.js
+++ b/extensions/amp-consent/0.1/test-e2e/common.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 let ui1;
 let ui2;
 let postPromptUi;
diff --git a/extensions/amp-consent/0.1/test-e2e/test-amp-consent-client-side.js b/extensions/amp-consent/0.1/test-e2e/test-amp-consent-client-side.js
index 474381e716de..0e3697461de0 100644
--- a/extensions/amp-consent/0.1/test-e2e/test-amp-consent-client-side.js
+++ b/extensions/amp-consent/0.1/test-e2e/test-amp-consent-client-side.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   findElements,
   resetAllElements,
diff --git a/extensions/amp-consent/0.1/test-e2e/test-amp-consent-server-side-expire-cache.js b/extensions/amp-consent/0.1/test-e2e/test-amp-consent-server-side-expire-cache.js
index 7c5c62b7971a..4cf3199b9c8a 100644
--- a/extensions/amp-consent/0.1/test-e2e/test-amp-consent-server-side-expire-cache.js
+++ b/extensions/amp-consent/0.1/test-e2e/test-amp-consent-server-side-expire-cache.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   findElements,
   resetAllElements,
diff --git a/extensions/amp-consent/0.1/test-e2e/test-amp-consent-server-side.js b/extensions/amp-consent/0.1/test-e2e/test-amp-consent-server-side.js
index 51d850152fc8..6ca79d63345e 100644
--- a/extensions/amp-consent/0.1/test-e2e/test-amp-consent-server-side.js
+++ b/extensions/amp-consent/0.1/test-e2e/test-amp-consent-server-side.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   findElements,
   resetAllElements,
diff --git a/extensions/amp-consent/0.1/test-e2e/test-cmp-ui-interaction.js b/extensions/amp-consent/0.1/test-e2e/test-cmp-ui-interaction.js
index d193b22daa3d..a88521018d18 100644
--- a/extensions/amp-consent/0.1/test-e2e/test-cmp-ui-interaction.js
+++ b/extensions/amp-consent/0.1/test-e2e/test-cmp-ui-interaction.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {afterRenderPromise, awaitFrameAfter} from '#testing/helpers';
 
 describes.endtoend(
diff --git a/extensions/amp-consent/0.1/test/test-amp-consent.js b/extensions/amp-consent/0.1/test/test-amp-consent.js
index 872a2fffd219..94fa91f39ad8 100644
--- a/extensions/amp-consent/0.1/test/test-amp-consent.js
+++ b/extensions/amp-consent/0.1/test/test-amp-consent.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ACTION_TYPE, AmpConsent} from '../amp-consent';
 import {
   CONSENT_ITEM_STATE,
diff --git a/extensions/amp-consent/0.1/test/test-consent-config.js b/extensions/amp-consent/0.1/test/test-consent-config.js
index 410f7634e851..0c2ce5356a85 100644
--- a/extensions/amp-consent/0.1/test/test-consent-config.js
+++ b/extensions/amp-consent/0.1/test/test-consent-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CONSENT_POLICY_STATE} from '#core/constants/consent-state';
 import {
   ConsentConfig,
diff --git a/extensions/amp-consent/0.1/test/test-consent-info.js b/extensions/amp-consent/0.1/test/test-consent-info.js
index 4918383cee33..a475a472ede6 100644
--- a/extensions/amp-consent/0.1/test/test-consent-info.js
+++ b/extensions/amp-consent/0.1/test/test-consent-info.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   CONSENT_ITEM_STATE,
   METADATA_STORAGE_KEY,
diff --git a/extensions/amp-consent/0.1/test/test-consent-policy-manager.js b/extensions/amp-consent/0.1/test/test-consent-policy-manager.js
index 8db9eda7948a..071b1d845af0 100644
--- a/extensions/amp-consent/0.1/test/test-consent-policy-manager.js
+++ b/extensions/amp-consent/0.1/test/test-consent-policy-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 import {
   CONSENT_ITEM_STATE,
diff --git a/extensions/amp-consent/0.1/test/test-consent-state-manager.js b/extensions/amp-consent/0.1/test/test-consent-state-manager.js
index 5397c2c47b6a..dd0d1f7d1602 100644
--- a/extensions/amp-consent/0.1/test/test-consent-state-manager.js
+++ b/extensions/amp-consent/0.1/test/test-consent-state-manager.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {
   CONSENT_ITEM_STATE,
   PURPOSE_CONSENT_STATE,
diff --git a/extensions/amp-consent/0.1/test/test-consent-ui.js b/extensions/amp-consent/0.1/test/test-consent-ui.js
index cb49593d58b7..3b1b109eb4fa 100644
--- a/extensions/amp-consent/0.1/test/test-consent-ui.js
+++ b/extensions/amp-consent/0.1/test/test-consent-ui.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 import {
   CONSENT_ITEM_STATE,
diff --git a/extensions/amp-consent/0.1/test/test-cookie-writer.js b/extensions/amp-consent/0.1/test/test-cookie-writer.js
index e0748d09417c..d142557b3400 100644
--- a/extensions/amp-consent/0.1/test/test-cookie-writer.js
+++ b/extensions/amp-consent/0.1/test/test-cookie-writer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as cookie from '../../../../src/cookies';
 import * as fakeTimers from '@sinonjs/fake-timers';
 import {CookieWriter} from '../cookie-writer';
diff --git a/extensions/amp-consent/0.1/test/test-crc32.js b/extensions/amp-consent/0.1/test/test-crc32.js
index 7233b864d533..9b95de556b6f 100644
--- a/extensions/amp-consent/0.1/test/test-crc32.js
+++ b/extensions/amp-consent/0.1/test/test-crc32.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {crc32} from '../crc32';
 
 const testVectors = [
diff --git a/extensions/amp-consent/0.1/test/test-linker-reader.js b/extensions/amp-consent/0.1/test/test-linker-reader.js
index 0f8a48ca898c..ee6cc531428f 100644
--- a/extensions/amp-consent/0.1/test/test-linker-reader.js
+++ b/extensions/amp-consent/0.1/test/test-linker-reader.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ConsentLinkerReader} from '../linker-reader';
 import {mockWindowInterface} from '#testing/test-helper';
 
diff --git a/extensions/amp-consent/0.1/test/test-linker.js b/extensions/amp-consent/0.1/test/test-linker.js
index 1f4d6a63b3f6..96707be8e577 100644
--- a/extensions/amp-consent/0.1/test/test-linker.js
+++ b/extensions/amp-consent/0.1/test/test-linker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createLinker, parseLinker} from '../linker';
 import {mockWindowInterface} from '#testing/test-helper';
 
diff --git a/extensions/amp-consent/0.1/test/test-tcf-api-command-manager.js b/extensions/amp-consent/0.1/test/test-tcf-api-command-manager.js
index c04d8a20a1f5..ca45f9f966c4 100644
--- a/extensions/amp-consent/0.1/test/test-tcf-api-command-manager.js
+++ b/extensions/amp-consent/0.1/test/test-tcf-api-command-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {TcfApiCommandManager} from '../tcf-api-command-manager';
 import {macroTask} from '#testing/helpers';
 import {mockWindowInterface} from '#testing/test-helper';
diff --git a/extensions/amp-consent/cmps/_ping_.md b/extensions/amp-consent/cmps/_ping_.md
index bef20a7e2f16..91b044dcdd97 100644
--- a/extensions/amp-consent/cmps/_ping_.md
+++ b/extensions/amp-consent/cmps/_ping_.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # \_PING\_
 
 A fake cmp type that is only used for local development.
diff --git a/extensions/amp-consent/cmps/appconsent.md b/extensions/amp-consent/cmps/appconsent.md
index e9f56deaaffc..93214c5c8933 100644
--- a/extensions/amp-consent/cmps/appconsent.md
+++ b/extensions/amp-consent/cmps/appconsent.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AppConsent
 
 CMP used through AppConsent platform in order to handle and enforce user consent.
diff --git a/extensions/amp-consent/cmps/consentmanager.md b/extensions/amp-consent/cmps/consentmanager.md
index f256b12d84fa..ac483d87a5e6 100644
--- a/extensions/amp-consent/cmps/consentmanager.md
+++ b/extensions/amp-consent/cmps/consentmanager.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # ConsentManager
 
 Collect and enforce user consent with the ConsentManager CMP. Login to your ConsentManager.net account in order to create a CMP.
diff --git a/extensions/amp-consent/cmps/didomi.md b/extensions/amp-consent/cmps/didomi.md
index 8e06948c8f4f..5322850cf3cf 100644
--- a/extensions/amp-consent/cmps/didomi.md
+++ b/extensions/amp-consent/cmps/didomi.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # DIDOMI
 
 Collect and enforce user consent with the Didomi Consent Management Platform. Use the [Didomi Console](https://console.didomi.io/) to create and configure your consent notices.
diff --git a/extensions/amp-consent/cmps/iubenda.md b/extensions/amp-consent/cmps/iubenda.md
index a02c64d2d620..4a3be9638456 100644
--- a/extensions/amp-consent/cmps/iubenda.md
+++ b/extensions/amp-consent/cmps/iubenda.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # iubenda
 
 iubenda makes your sites & apps legally compliant across multiple languages and legislations (including the GDPR) with lawyer-crafted, self-updating solutions. [Read our guide](https://www.iubenda.com/en/help/22135-cookie-solution-amp) to integrate our Cookie Solution in your AMP pages.
diff --git a/extensions/amp-consent/cmps/liveramp.md b/extensions/amp-consent/cmps/liveramp.md
index fc0f8cc93caf..6f927f49bdc2 100644
--- a/extensions/amp-consent/cmps/liveramp.md
+++ b/extensions/amp-consent/cmps/liveramp.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # LiveRamp
 
 ## Example
diff --git a/extensions/amp-consent/cmps/marfeel.md b/extensions/amp-consent/cmps/marfeel.md
index 3d85fbe66d3f..36cd823bcc9a 100644
--- a/extensions/amp-consent/cmps/marfeel.md
+++ b/extensions/amp-consent/cmps/marfeel.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Marfeel
 
 CMP used through Marfeel platform in order to handle and enforce user consent.
diff --git a/extensions/amp-consent/cmps/ogury.md b/extensions/amp-consent/cmps/ogury.md
index 1ba8025933a1..4913bc3c54aa 100644
--- a/extensions/amp-consent/cmps/ogury.md
+++ b/extensions/amp-consent/cmps/ogury.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Ogury
 
 ## Prerequisite
diff --git a/extensions/amp-consent/cmps/onetrust.md b/extensions/amp-consent/cmps/onetrust.md
index 455612eedd3c..4881cf710ea8 100644
--- a/extensions/amp-consent/cmps/onetrust.md
+++ b/extensions/amp-consent/cmps/onetrust.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # OneTrust
 
 ## Example
diff --git a/extensions/amp-consent/cmps/opencmp.md b/extensions/amp-consent/cmps/opencmp.md
index cf2c2faafe70..e29a1f189c6a 100644
--- a/extensions/amp-consent/cmps/opencmp.md
+++ b/extensions/amp-consent/cmps/opencmp.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # opencmp
 
 ## Example
diff --git a/extensions/amp-consent/cmps/pubtech.md b/extensions/amp-consent/cmps/pubtech.md
index 917bde667a16..8e0ac2d9fa06 100644
--- a/extensions/amp-consent/cmps/pubtech.md
+++ b/extensions/amp-consent/cmps/pubtech.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Pubtech
 
 ## Example
diff --git a/extensions/amp-consent/cmps/quantcast.md b/extensions/amp-consent/cmps/quantcast.md
index 21ba7a206009..75711abbf438 100644
--- a/extensions/amp-consent/cmps/quantcast.md
+++ b/extensions/amp-consent/cmps/quantcast.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Quantcast
 
 ## Example
diff --git a/extensions/amp-consent/cmps/sirdata.md b/extensions/amp-consent/cmps/sirdata.md
index e3e56e03aeb7..a59cc4e931a3 100644
--- a/extensions/amp-consent/cmps/sirdata.md
+++ b/extensions/amp-consent/cmps/sirdata.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Sirdata
 
 Collects user consent with Sirdata CMP.
diff --git a/extensions/amp-consent/cmps/sourcepoint.md b/extensions/amp-consent/cmps/sourcepoint.md
index 952117c1b7bc..16eb4da113a1 100644
--- a/extensions/amp-consent/cmps/sourcepoint.md
+++ b/extensions/amp-consent/cmps/sourcepoint.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # SourcePoint
 
 ## Example
diff --git a/extensions/amp-consent/cmps/uniconsent.md b/extensions/amp-consent/cmps/uniconsent.md
index 403a04ca0c8b..f369f67e290f 100644
--- a/extensions/amp-consent/cmps/uniconsent.md
+++ b/extensions/amp-consent/cmps/uniconsent.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # UniConsent
 
 Collect and manage user consent with UniConsent CMP.
diff --git a/extensions/amp-consent/cmps/usercentrics.md b/extensions/amp-consent/cmps/usercentrics.md
index 4b59635174fd..64c529bd2b21 100644
--- a/extensions/amp-consent/cmps/usercentrics.md
+++ b/extensions/amp-consent/cmps/usercentrics.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Usercentrics
 
 Collect user consent with Usercentrics CMP.
diff --git a/extensions/amp-crypto-polyfill/0.1/amp-crypto-polyfill.js b/extensions/amp-crypto-polyfill/0.1/amp-crypto-polyfill.js
index 3ac3228afd97..7b7a956042f4 100644
--- a/extensions/amp-crypto-polyfill/0.1/amp-crypto-polyfill.js
+++ b/extensions/amp-crypto-polyfill/0.1/amp-crypto-polyfill.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {sha384} from '#third_party/closure-library/sha384-generated';
 
 import {registerServiceBuilder} from '../../../src/service-helpers';
diff --git a/extensions/amp-dailymotion/0.1/amp-dailymotion.js b/extensions/amp-dailymotion/0.1/amp-dailymotion.js
index f2b4c9494222..89bf99c03019 100644
--- a/extensions/amp-dailymotion/0.1/amp-dailymotion.js
+++ b/extensions/amp-dailymotion/0.1/amp-dailymotion.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {PauseHelper} from '#core/dom/video/pause-helper';
 import {Services} from '#service';
diff --git a/extensions/amp-dailymotion/0.1/test/test-amp-dailymotion.js b/extensions/amp-dailymotion/0.1/test/test-amp-dailymotion.js
index 40521b510a79..56ab9bce0ca1 100644
--- a/extensions/amp-dailymotion/0.1/test/test-amp-dailymotion.js
+++ b/extensions/amp-dailymotion/0.1/test/test-amp-dailymotion.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-dailymotion';
 
 describes.realWin(
diff --git a/extensions/amp-dailymotion/amp-dailymotion.md b/extensions/amp-dailymotion/amp-dailymotion.md
index ce745941fb12..5e7ab465dac6 100644
--- a/extensions/amp-dailymotion/amp-dailymotion.md
+++ b/extensions/amp-dailymotion/amp-dailymotion.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays a Dailymotion video.
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-dailymotion
 
 ## Usage
diff --git a/extensions/amp-date-countdown/0.1/amp-date-countdown.js b/extensions/amp-date-countdown/0.1/amp-date-countdown.js
index 681560171f79..6b746c1e0c51 100644
--- a/extensions/amp-date-countdown/0.1/amp-date-countdown.js
+++ b/extensions/amp-date-countdown/0.1/amp-date-countdown.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {removeChildren} from '#core/dom';
 import {isLayoutSizeDefined} from '#core/dom/layout';
diff --git a/extensions/amp-date-countdown/0.1/test/test-amp-date-countdown.js b/extensions/amp-date-countdown/0.1/test/test-amp-date-countdown.js
index 5f008d717403..77f0c28b332a 100644
--- a/extensions/amp-date-countdown/0.1/test/test-amp-date-countdown.js
+++ b/extensions/amp-date-countdown/0.1/test/test-amp-date-countdown.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import '../amp-date-countdown';
 //import {Services} from '../../../../src/service';
 
diff --git a/extensions/amp-date-countdown/1.0/amp-date-countdown.css b/extensions/amp-date-countdown/1.0/amp-date-countdown.css
index ec4b08955618..f21a232c9c0b 100644
--- a/extensions/amp-date-countdown/1.0/amp-date-countdown.css
+++ b/extensions/amp-date-countdown/1.0/amp-date-countdown.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * Pre-upgrade:
diff --git a/extensions/amp-date-countdown/1.0/amp-date-countdown.js b/extensions/amp-date-countdown/1.0/amp-date-countdown.js
index 87b452840f7a..0f8b84ad458e 100644
--- a/extensions/amp-date-countdown/1.0/amp-date-countdown.js
+++ b/extensions/amp-date-countdown/1.0/amp-date-countdown.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isLayoutSizeDefined} from '#core/dom/layout';
 import {dict} from '#core/types/object';
 
diff --git a/extensions/amp-date-countdown/1.0/base-element.js b/extensions/amp-date-countdown/1.0/base-element.js
index 0385a84af8ff..89a5316bcd0d 100644
--- a/extensions/amp-date-countdown/1.0/base-element.js
+++ b/extensions/amp-date-countdown/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseDateAttrs as parseDateAttrsBase} from '#core/dom/parse-date-attributes';
 
 import {PreactBaseElement} from '#preact/base-element';
diff --git a/extensions/amp-date-countdown/1.0/component.js b/extensions/amp-date-countdown/1.0/component.js
index 79fe89618d9a..b46a0db4549f 100644
--- a/extensions/amp-date-countdown/1.0/component.js
+++ b/extensions/amp-date-countdown/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getDate} from '#core/types/date';
 import {dict} from '#core/types/object';
 
diff --git a/extensions/amp-date-countdown/1.0/component.type.js b/extensions/amp-date-countdown/1.0/component.type.js
index 1ebebba6ca71..8c41a64c5c7d 100644
--- a/extensions/amp-date-countdown/1.0/component.type.js
+++ b/extensions/amp-date-countdown/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /**
diff --git a/extensions/amp-date-countdown/1.0/messages.js b/extensions/amp-date-countdown/1.0/messages.js
index 371ae521f662..2ebadba63ff3 100644
--- a/extensions/amp-date-countdown/1.0/messages.js
+++ b/extensions/amp-date-countdown/1.0/messages.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Get locale strings or undefined.
  * @param {string} locale
diff --git a/extensions/amp-date-countdown/1.0/storybook/Basic.amp.js b/extensions/amp-date-countdown/1.0/storybook/Basic.amp.js
index 5d502541dc73..97a71844b66c 100644
--- a/extensions/amp-date-countdown/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-date-countdown/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {boolean, date, select, text, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-date-countdown/1.0/storybook/Basic.js b/extensions/amp-date-countdown/1.0/storybook/Basic.js
index 52108931f72c..654dc891099f 100644
--- a/extensions/amp-date-countdown/1.0/storybook/Basic.js
+++ b/extensions/amp-date-countdown/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {boolean, date, select, withKnobs} from '@storybook/addon-knobs';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-date-countdown/1.0/test-e2e/test-amp-date-countdown.js b/extensions/amp-date-countdown/1.0/test-e2e/test-amp-date-countdown.js
index dbd406e18f7d..7ce1ef49151f 100644
--- a/extensions/amp-date-countdown/1.0/test-e2e/test-amp-date-countdown.js
+++ b/extensions/amp-date-countdown/1.0/test-e2e/test-amp-date-countdown.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-date-countdown',
   {
diff --git a/extensions/amp-date-countdown/1.0/test/test-amp-date-countdown.js b/extensions/amp-date-countdown/1.0/test/test-amp-date-countdown.js
index 03e39ed40abb..0ffa5ceedb41 100644
--- a/extensions/amp-date-countdown/1.0/test/test-amp-date-countdown.js
+++ b/extensions/amp-date-countdown/1.0/test/test-amp-date-countdown.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../../../amp-mustache/0.2/amp-mustache';
 import '../amp-date-countdown';
 import {whenUpgradedToCustomElement} from '#core/dom/amp-element-helpers';
diff --git a/extensions/amp-date-countdown/1.0/test/test-component.js b/extensions/amp-date-countdown/1.0/test/test-component.js
index cf0bd975cc64..ed35c7c819d5 100644
--- a/extensions/amp-date-countdown/1.0/test/test-component.js
+++ b/extensions/amp-date-countdown/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {mount} from 'enzyme';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-date-display/0.1/amp-date-display.js b/extensions/amp-date-display/0.1/amp-date-display.js
index 19705b45ddf3..1a9699962f00 100644
--- a/extensions/amp-date-display/0.1/amp-date-display.js
+++ b/extensions/amp-date-display/0.1/amp-date-display.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 import {removeChildren} from '#core/dom';
 import {isLayoutSizeDefined} from '#core/dom/layout';
diff --git a/extensions/amp-date-display/0.1/test/test-amp-date-display.js b/extensions/amp-date-display/0.1/test/test-amp-date-display.js
index 17ad1b72fae8..20db3fd511da 100644
--- a/extensions/amp-date-display/0.1/test/test-amp-date-display.js
+++ b/extensions/amp-date-display/0.1/test/test-amp-date-display.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-date-display';
 import * as fakeTimers from '@sinonjs/fake-timers';
 import {expect} from 'chai';
diff --git a/extensions/amp-date-display/1.0/amp-date-display.css b/extensions/amp-date-display/1.0/amp-date-display.css
index 3781f6f1f925..1432f4c0b725 100644
--- a/extensions/amp-date-display/1.0/amp-date-display.css
+++ b/extensions/amp-date-display/1.0/amp-date-display.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * Pre-upgrade:
diff --git a/extensions/amp-date-display/1.0/amp-date-display.js b/extensions/amp-date-display/1.0/amp-date-display.js
index 7809aa5e5ff3..15b7861f14a7 100644
--- a/extensions/amp-date-display/1.0/amp-date-display.js
+++ b/extensions/amp-date-display/1.0/amp-date-display.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {isExperimentOn} from '#experiments';
diff --git a/extensions/amp-date-display/1.0/base-element.js b/extensions/amp-date-display/1.0/base-element.js
index cdbadae9801b..c1980d71a9c3 100644
--- a/extensions/amp-date-display/1.0/base-element.js
+++ b/extensions/amp-date-display/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseDateAttrs as parseDateAttrsBase} from '#core/dom/parse-date-attributes';
 
 import {PreactBaseElement} from '#preact/base-element';
diff --git a/extensions/amp-date-display/1.0/component.js b/extensions/amp-date-display/1.0/component.js
index 98cc66226fb6..b8ad966fcd41 100644
--- a/extensions/amp-date-display/1.0/component.js
+++ b/extensions/amp-date-display/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getDate} from '#core/types/date';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-date-display/1.0/component.type.js b/extensions/amp-date-display/1.0/component.type.js
index ce90e9635de3..64a5aafc0f68 100644
--- a/extensions/amp-date-display/1.0/component.type.js
+++ b/extensions/amp-date-display/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-date-display/1.0/storybook/Basic.amp.js b/extensions/amp-date-display/1.0/storybook/Basic.amp.js
index 1b51f3d4b61e..fc1f53705243 100644
--- a/extensions/amp-date-display/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-date-display/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {date, select, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-date-display/1.0/storybook/Basic.js b/extensions/amp-date-display/1.0/storybook/Basic.js
index 23036476444d..dc921ab72e87 100644
--- a/extensions/amp-date-display/1.0/storybook/Basic.js
+++ b/extensions/amp-date-display/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {date, select, withKnobs} from '@storybook/addon-knobs';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-date-display/1.0/test/test-amp-date-display.js b/extensions/amp-date-display/1.0/test/test-amp-date-display.js
index 5a58b0c486ba..d2bbd0af76f0 100644
--- a/extensions/amp-date-display/1.0/test/test-amp-date-display.js
+++ b/extensions/amp-date-display/1.0/test/test-amp-date-display.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../../../amp-mustache/0.2/amp-mustache';
 import '../amp-date-display';
 import {expect} from 'chai';
diff --git a/extensions/amp-date-display/1.0/test/test-component.js b/extensions/amp-date-display/1.0/test/test-component.js
index 54cfacaad9b8..bfb2d335624f 100644
--- a/extensions/amp-date-display/1.0/test/test-component.js
+++ b/extensions/amp-date-display/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {mount} from 'enzyme';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-date-picker/0.1/amp-date-picker.css b/extensions/amp-date-picker/0.1/amp-date-picker.css
index 832484ac5a97..8ce04a22661d 100644
--- a/extensions/amp-date-picker/0.1/amp-date-picker.css
+++ b/extensions/amp-date-picker/0.1/amp-date-picker.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import '../../../third_party/react-dates/_datepicker.css';
 
diff --git a/extensions/amp-date-picker/0.1/amp-date-picker.js b/extensions/amp-date-picker/0.1/amp-date-picker.js
index 0c31d0569e66..0a461dccff06 100644
--- a/extensions/amp-date-picker/0.1/amp-date-picker.js
+++ b/extensions/amp-date-picker/0.1/amp-date-picker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {AmpEvents} from '#core/constants/amp-events';
 import {Keys} from '#core/constants/key-codes';
diff --git a/extensions/amp-date-picker/0.1/constants.js b/extensions/amp-date-picker/0.1/constants.js
index 3366ed683637..90f6274ac707 100644
--- a/extensions/amp-date-picker/0.1/constants.js
+++ b/extensions/amp-date-picker/0.1/constants.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 export const DEFAULT_LOCALE = 'en';
 
 /**
diff --git a/extensions/amp-date-picker/0.1/date-picker-common.js b/extensions/amp-date-picker/0.1/date-picker-common.js
index 9c5d16780fd7..c74d44809756 100644
--- a/extensions/amp-date-picker/0.1/date-picker-common.js
+++ b/extensions/amp-date-picker/0.1/date-picker-common.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict, omit} from '#core/types/object';
 
 import {requireExternal} from '../../../src/module';
diff --git a/extensions/amp-date-picker/0.1/date-range-picker.js b/extensions/amp-date-picker/0.1/date-range-picker.js
index c20d32b613b7..50ef87b56219 100644
--- a/extensions/amp-date-picker/0.1/date-range-picker.js
+++ b/extensions/amp-date-picker/0.1/date-range-picker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {withDatePickerCommon} from './date-picker-common';
diff --git a/extensions/amp-date-picker/0.1/dates-list.js b/extensions/amp-date-picker/0.1/dates-list.js
index 10bc8b181f63..54eaaca04f52 100644
--- a/extensions/amp-date-picker/0.1/dates-list.js
+++ b/extensions/amp-date-picker/0.1/dates-list.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as rrule from '../../../node_modules/rrule/dist/es5/rrule';
 import {requireExternal} from '../../../src/module';
 
diff --git a/extensions/amp-date-picker/0.1/defaultPhrases.js b/extensions/amp-date-picker/0.1/defaultPhrases.js
index 58037435692f..75c86b98e5e5 100644
--- a/extensions/amp-date-picker/0.1/defaultPhrases.js
+++ b/extensions/amp-date-picker/0.1/defaultPhrases.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 const calendarLabel = 'Calendar';
diff --git a/extensions/amp-date-picker/0.1/react-utils.js b/extensions/amp-date-picker/0.1/react-utils.js
index 30a5f452a2aa..8c95731edf00 100644
--- a/extensions/amp-date-picker/0.1/react-utils.js
+++ b/extensions/amp-date-picker/0.1/react-utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {requireExternal} from '../../../src/module';
 
 /**
diff --git a/extensions/amp-date-picker/0.1/single-date-picker.js b/extensions/amp-date-picker/0.1/single-date-picker.js
index ddc8b49a5604..6ff3a747e947 100644
--- a/extensions/amp-date-picker/0.1/single-date-picker.js
+++ b/extensions/amp-date-picker/0.1/single-date-picker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {withDatePickerCommon} from './date-picker-common';
diff --git a/extensions/amp-date-picker/0.1/test-e2e/test-blocked-dates.js b/extensions/amp-date-picker/0.1/test-e2e/test-blocked-dates.js
index a325a6716920..2963de73f6bf 100644
--- a/extensions/amp-date-picker/0.1/test-e2e/test-blocked-dates.js
+++ b/extensions/amp-date-picker/0.1/test-e2e/test-blocked-dates.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Key} from '#testing/helpers/types';
 
 describes.endtoend(
diff --git a/extensions/amp-date-picker/0.1/test/integration/test-integration-amp-date-picker-actions.js b/extensions/amp-date-picker/0.1/test/integration/test-integration-amp-date-picker-actions.js
index 51dd7ae04c84..f9d71d26b41b 100644
--- a/extensions/amp-date-picker/0.1/test/integration/test-integration-amp-date-picker-actions.js
+++ b/extensions/amp-date-picker/0.1/test/integration/test-integration-amp-date-picker-actions.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {poll} from '#testing/iframe';
diff --git a/extensions/amp-date-picker/0.1/test/integration/test-integration-amp-date-picker-init.js b/extensions/amp-date-picker/0.1/test/integration/test-integration-amp-date-picker-init.js
index f11b26947e5a..c817282303cc 100644
--- a/extensions/amp-date-picker/0.1/test/integration/test-integration-amp-date-picker-init.js
+++ b/extensions/amp-date-picker/0.1/test/integration/test-integration-amp-date-picker-init.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 
 import {createFixtureIframe} from '#testing/iframe';
diff --git a/extensions/amp-date-picker/0.1/test/integration/test-integration-dates-attributes.js b/extensions/amp-date-picker/0.1/test/integration/test-integration-dates-attributes.js
index 3fa91cf93cd4..ec1a4dd8baa5 100644
--- a/extensions/amp-date-picker/0.1/test/integration/test-integration-dates-attributes.js
+++ b/extensions/amp-date-picker/0.1/test/integration/test-integration-dates-attributes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {htmlFor} from '#core/dom/static-template';
diff --git a/extensions/amp-date-picker/0.1/test/integration/test-integration-maximum-nights.js b/extensions/amp-date-picker/0.1/test/integration/test-integration-maximum-nights.js
index 4ee7946df442..21f0942b1332 100644
--- a/extensions/amp-date-picker/0.1/test/integration/test-integration-maximum-nights.js
+++ b/extensions/amp-date-picker/0.1/test/integration/test-integration-maximum-nights.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {htmlFor} from '#core/dom/static-template';
diff --git a/extensions/amp-date-picker/0.1/test/test-amp-date-picker-bind.js b/extensions/amp-date-picker/0.1/test/test-amp-date-picker-bind.js
index 778550ef12a5..0c37b53ed134 100644
--- a/extensions/amp-date-picker/0.1/test/test-amp-date-picker-bind.js
+++ b/extensions/amp-date-picker/0.1/test/test-amp-date-picker-bind.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import '#third_party/react-dates/bundle';
 import * as fakeTimers from '@sinonjs/fake-timers';
 
diff --git a/extensions/amp-date-picker/0.1/test/test-amp-date-picker-state.js b/extensions/amp-date-picker/0.1/test/test-amp-date-picker-state.js
index d97b07caa503..f3025c959e65 100644
--- a/extensions/amp-date-picker/0.1/test/test-amp-date-picker-state.js
+++ b/extensions/amp-date-picker/0.1/test/test-amp-date-picker-state.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import '#third_party/react-dates/bundle';
 import * as fakeTimers from '@sinonjs/fake-timers';
 
diff --git a/extensions/amp-date-picker/0.1/test/test-amp-date-picker.js b/extensions/amp-date-picker/0.1/test/test-amp-date-picker.js
index cbc85ceffa4a..fa232cae32a9 100644
--- a/extensions/amp-date-picker/0.1/test/test-amp-date-picker.js
+++ b/extensions/amp-date-picker/0.1/test/test-amp-date-picker.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import '#third_party/react-dates/bundle';
 import * as fakeTimers from '@sinonjs/fake-timers';
 
diff --git a/extensions/amp-date-picker/0.1/test/test-dates-list.js b/extensions/amp-date-picker/0.1/test/test-dates-list.js
index e8a81461d2eb..bd4eb511300a 100644
--- a/extensions/amp-date-picker/0.1/test/test-dates-list.js
+++ b/extensions/amp-date-picker/0.1/test/test-dates-list.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '#third_party/react-dates/bundle';
 import {requireExternal} from '../../../../src/module';
 import {DatesList} from '../dates-list';
diff --git a/extensions/amp-date-picker/0.1/test/test-wrapper-maximum-nights.js b/extensions/amp-date-picker/0.1/test/test-wrapper-maximum-nights.js
index 814496df1246..ae521d995e44 100644
--- a/extensions/amp-date-picker/0.1/test/test-wrapper-maximum-nights.js
+++ b/extensions/amp-date-picker/0.1/test/test-wrapper-maximum-nights.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import '#third_party/react-dates/bundle';
 import * as fakeTimers from '@sinonjs/fake-timers';
 
diff --git a/extensions/amp-date-picker/0.1/wrappers/maximum-nights.js b/extensions/amp-date-picker/0.1/wrappers/maximum-nights.js
index b0bf7487c6e2..b2ba374d6bae 100644
--- a/extensions/amp-date-picker/0.1/wrappers/maximum-nights.js
+++ b/extensions/amp-date-picker/0.1/wrappers/maximum-nights.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {requireExternal} from '../../../../src/module';
 
 /**
diff --git a/extensions/amp-date-picker/amp-date-picker.md b/extensions/amp-date-picker/amp-date-picker.md
index d1dd71088223..f1b82c928134 100644
--- a/extensions/amp-date-picker/amp-date-picker.md
+++ b/extensions/amp-date-picker/amp-date-picker.md
@@ -6,22 +6,6 @@ teaser:
   text: Provides a widget to select dates. The date picker can render as an overlay relative to input fields, or as a static calendar widget.
 ---
 
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-date-picker
 
 ## Usage
diff --git a/extensions/amp-delight-player/0.1/amp-delight-player.css b/extensions/amp-delight-player/0.1/amp-delight-player.css
index 90140ab59549..1c49480010c7 100644
--- a/extensions/amp-delight-player/0.1/amp-delight-player.css
+++ b/extensions/amp-delight-player/0.1/amp-delight-player.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-delight-player [placeholder] {
   transition: opacity 0.5s ease-out;
diff --git a/extensions/amp-delight-player/0.1/amp-delight-player.js b/extensions/amp-delight-player/0.1/amp-delight-player.js
index 147e23c1d6f7..7ad217a93038 100644
--- a/extensions/amp-delight-player/0.1/amp-delight-player.js
+++ b/extensions/amp-delight-player/0.1/amp-delight-player.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Deferred} from '#core/data-structures/promise';
 import {dispatchCustomEvent, removeElement} from '#core/dom';
 import {applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
diff --git a/extensions/amp-delight-player/0.1/test/test-amp-delight-player.js b/extensions/amp-delight-player/0.1/test/test-amp-delight-player.js
index c147146e6df1..305ea7e47c80 100644
--- a/extensions/amp-delight-player/0.1/test/test-amp-delight-player.js
+++ b/extensions/amp-delight-player/0.1/test/test-amp-delight-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-delight-player';
 import {listenOncePromise} from '../../../../src/event-helper';
 import {VideoEvents} from '../../../../src/video-interface';
diff --git a/extensions/amp-delight-player/amp-delight-player.md b/extensions/amp-delight-player/amp-delight-player.md
index 28d5e04f5fd1..dac678f12c6f 100644
--- a/extensions/amp-delight-player/amp-delight-player.md
+++ b/extensions/amp-delight-player/amp-delight-player.md
@@ -6,22 +6,6 @@ teaser:
   text: The amp-delight-player element displays a cloud-hosted Delight Player.
 ---
 
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-delight-player
 
 ## Usage
diff --git a/extensions/amp-dynamic-css-classes/0.1/amp-dynamic-css-classes.js b/extensions/amp-dynamic-css-classes/0.1/amp-dynamic-css-classes.js
index 59a88c55c5a1..c7c23f95f608 100644
--- a/extensions/amp-dynamic-css-classes/0.1/amp-dynamic-css-classes.js
+++ b/extensions/amp-dynamic-css-classes/0.1/amp-dynamic-css-classes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 /**
diff --git a/extensions/amp-dynamic-css-classes/0.1/test/test-dynamic-classes.js b/extensions/amp-dynamic-css-classes/0.1/test/test-dynamic-classes.js
index e003fec7b40f..00303f108505 100644
--- a/extensions/amp-dynamic-css-classes/0.1/test/test-dynamic-classes.js
+++ b/extensions/amp-dynamic-css-classes/0.1/test/test-dynamic-classes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {referrers_} from '../amp-dynamic-css-classes';
 
 describes.sandboxed('amp-dynamic-css-classes', {}, () => {
diff --git a/extensions/amp-dynamic-css-classes/0.1/test/test-runtime-classes.js b/extensions/amp-dynamic-css-classes/0.1/test/test-runtime-classes.js
index 85c67e4368b3..59f345af349b 100644
--- a/extensions/amp-dynamic-css-classes/0.1/test/test-runtime-classes.js
+++ b/extensions/amp-dynamic-css-classes/0.1/test/test-runtime-classes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-dynamic-css-classes';
 import {Services} from '#service';
 import {vsyncForTesting} from '#service/vsync-impl';
diff --git a/extensions/amp-dynamic-css-classes/amp-dynamic-css-classes.md b/extensions/amp-dynamic-css-classes/amp-dynamic-css-classes.md
index fac1fbe7219d..fb941b8bf4bc 100644
--- a/extensions/amp-dynamic-css-classes/amp-dynamic-css-classes.md
+++ b/extensions/amp-dynamic-css-classes/amp-dynamic-css-classes.md
@@ -6,22 +6,6 @@ teaser:
   text: Adds several dynamic CSS class names onto the <body> element.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP Dynamic CSS Classes
 
 ## Behavior
diff --git a/extensions/amp-embedly-card/0.1/amp-embedly-card-impl.js b/extensions/amp-embedly-card/0.1/amp-embedly-card-impl.js
index 28b6d75e7b14..8afb227eda0d 100644
--- a/extensions/amp-embedly-card/0.1/amp-embedly-card-impl.js
+++ b/extensions/amp-embedly-card/0.1/amp-embedly-card-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeElement} from '#core/dom';
 import {Layout, applyFillContent} from '#core/dom/layout';
 
diff --git a/extensions/amp-embedly-card/0.1/amp-embedly-card.js b/extensions/amp-embedly-card/0.1/amp-embedly-card.js
index f287983053c6..685ffd2944c5 100644
--- a/extensions/amp-embedly-card/0.1/amp-embedly-card.js
+++ b/extensions/amp-embedly-card/0.1/amp-embedly-card.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEmbedlyCard, TAG} from './amp-embedly-card-impl';
 import {AmpEmbedlyKey, TAG as KEY_TAG} from './amp-embedly-key';
 
diff --git a/extensions/amp-embedly-card/0.1/amp-embedly-key.js b/extensions/amp-embedly-card/0.1/amp-embedly-key.js
index 08916c4fc733..0ef6e752c84e 100644
--- a/extensions/amp-embedly-card/0.1/amp-embedly-key.js
+++ b/extensions/amp-embedly-card/0.1/amp-embedly-key.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Layout} from '#core/dom/layout';
 
 import {userAssert} from '../../../src/log';
diff --git a/extensions/amp-embedly-card/0.1/test/test-amp-embedly-card.js b/extensions/amp-embedly-card/0.1/test/test-amp-embedly-card.js
index e251c24523bb..0d1b8868c088 100644
--- a/extensions/amp-embedly-card/0.1/test/test-amp-embedly-card.js
+++ b/extensions/amp-embedly-card/0.1/test/test-amp-embedly-card.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-embedly-card';
 
 describes.realWin(
diff --git a/extensions/amp-embedly-card/1.0/amp-embedly-card.js b/extensions/amp-embedly-card/1.0/amp-embedly-card.js
index e783a2d7f258..8bc7324241f2 100644
--- a/extensions/amp-embedly-card/1.0/amp-embedly-card.js
+++ b/extensions/amp-embedly-card/1.0/amp-embedly-card.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Layout} from '#core/dom/layout';
 import {dict} from '#core/types/object';
 
diff --git a/extensions/amp-embedly-card/1.0/amp-embedly-key.js b/extensions/amp-embedly-card/1.0/amp-embedly-key.js
index 4851440d5fec..448159b53783 100644
--- a/extensions/amp-embedly-card/1.0/amp-embedly-key.js
+++ b/extensions/amp-embedly-card/1.0/amp-embedly-key.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Layout} from '#core/dom/layout';
 
 import {isExperimentOn} from '#experiments';
diff --git a/extensions/amp-embedly-card/1.0/base-element.js b/extensions/amp-embedly-card/1.0/base-element.js
index 7eb840a9fa2f..f80f98832a9e 100644
--- a/extensions/amp-embedly-card/1.0/base-element.js
+++ b/extensions/amp-embedly-card/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {PreactBaseElement} from '#preact/base-element';
 
diff --git a/extensions/amp-embedly-card/1.0/component.js b/extensions/amp-embedly-card/1.0/component.js
index 5dc1f4e68393..751b1f0c1028 100644
--- a/extensions/amp-embedly-card/1.0/component.js
+++ b/extensions/amp-embedly-card/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {deserializeMessage} from '#core/3p-frame-messaging';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-embedly-card/1.0/component.type.js b/extensions/amp-embedly-card/1.0/component.type.js
index b0566d8b124d..c42c0ce10e99 100644
--- a/extensions/amp-embedly-card/1.0/component.type.js
+++ b/extensions/amp-embedly-card/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-embedly-card/1.0/embedly-context.js b/extensions/amp-embedly-card/1.0/embedly-context.js
index 78831fa91c27..b7315cf70e96 100644
--- a/extensions/amp-embedly-card/1.0/embedly-context.js
+++ b/extensions/amp-embedly-card/1.0/embedly-context.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {createContext} from '#preact';
 
 const EmbedlyContext = createContext(
diff --git a/extensions/amp-embedly-card/1.0/storybook/Basic.amp.js b/extensions/amp-embedly-card/1.0/storybook/Basic.amp.js
index b602d747492e..6fe810835991 100644
--- a/extensions/amp-embedly-card/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-embedly-card/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {text, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-embedly-card/1.0/storybook/Basic.js b/extensions/amp-embedly-card/1.0/storybook/Basic.js
index bfb21dcf0314..a61428e1ae74 100644
--- a/extensions/amp-embedly-card/1.0/storybook/Basic.js
+++ b/extensions/amp-embedly-card/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {text, withKnobs} from '@storybook/addon-knobs';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-embedly-card/1.0/test/test-amp-embedly-card.js b/extensions/amp-embedly-card/1.0/test/test-amp-embedly-card.js
index 16157b136015..9706058198f5 100644
--- a/extensions/amp-embedly-card/1.0/test/test-amp-embedly-card.js
+++ b/extensions/amp-embedly-card/1.0/test/test-amp-embedly-card.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-embedly-card';
 import {createElementWithAttributes} from '#core/dom';
 import {computedStyle} from '#core/dom/style';
diff --git a/extensions/amp-experiment/0.1/amp-experiment.js b/extensions/amp-experiment/0.1/amp-experiment.js
index 78fff355f032..5282d0700799 100644
--- a/extensions/amp-experiment/0.1/amp-experiment.js
+++ b/extensions/amp-experiment/0.1/amp-experiment.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Layout} from '#core/dom/layout';
 import {parseJson} from '#core/types/object/json';
 
diff --git a/extensions/amp-experiment/0.1/test/test-amp-experiment.js b/extensions/amp-experiment/0.1/test/test-amp-experiment.js
index c4fc3f3cbcfe..9ddbcc139bcf 100644
--- a/extensions/amp-experiment/0.1/test/test-amp-experiment.js
+++ b/extensions/amp-experiment/0.1/test/test-amp-experiment.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {hasOwn} from '#core/types/object';
 
 import {Services} from '#service';
diff --git a/extensions/amp-experiment/0.1/test/test-variant.js b/extensions/amp-experiment/0.1/test/test-variant.js
index 33b5ad74adae..e6d507a97d7f 100644
--- a/extensions/amp-experiment/0.1/test/test-variant.js
+++ b/extensions/amp-experiment/0.1/test/test-variant.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {AmpDocSingle} from '#service/ampdoc-impl';
 
diff --git a/extensions/amp-experiment/0.1/variant.js b/extensions/amp-experiment/0.1/variant.js
index af70427c9fc1..acd5da8a77e3 100644
--- a/extensions/amp-experiment/0.1/variant.js
+++ b/extensions/amp-experiment/0.1/variant.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {isObject} from '#core/types';
 import {hasOwn} from '#core/types/object';
diff --git a/extensions/amp-experiment/1.0/amp-experiment.js b/extensions/amp-experiment/1.0/amp-experiment.js
index 7358d23bf573..5aa675e0aa19 100644
--- a/extensions/amp-experiment/1.0/amp-experiment.js
+++ b/extensions/amp-experiment/1.0/amp-experiment.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Layout} from '#core/dom/layout';
 import {dict} from '#core/types/object';
 import {parseJson} from '#core/types/object/json';
diff --git a/extensions/amp-experiment/1.0/apply-experiment.js b/extensions/amp-experiment/1.0/apply-experiment.js
index 4d2227b76314..24aad6106874 100644
--- a/extensions/amp-experiment/1.0/apply-experiment.js
+++ b/extensions/amp-experiment/1.0/apply-experiment.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   assertMutationRecordFormat,
   getElementsFromMutationRecordSelector,
diff --git a/extensions/amp-experiment/1.0/mutation-record.js b/extensions/amp-experiment/1.0/mutation-record.js
index 39890d2a19d3..880656dbcbcd 100644
--- a/extensions/amp-experiment/1.0/mutation-record.js
+++ b/extensions/amp-experiment/1.0/mutation-record.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isObject} from '#core/types';
 import {toArray} from '#core/types/array';
 
diff --git a/extensions/amp-experiment/1.0/mutation/attribute-mutation-default-class.js b/extensions/amp-experiment/1.0/mutation/attribute-mutation-default-class.js
index bd73c718fb5a..7839009e193d 100644
--- a/extensions/amp-experiment/1.0/mutation/attribute-mutation-default-class.js
+++ b/extensions/amp-experiment/1.0/mutation/attribute-mutation-default-class.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {assertAttributeMutationFormat} from './mutation';
 
 /**
diff --git a/extensions/amp-experiment/1.0/mutation/attribute-mutation-default-style.js b/extensions/amp-experiment/1.0/mutation/attribute-mutation-default-style.js
index 6f7c30d9e859..8ca3f6ceb3fb 100644
--- a/extensions/amp-experiment/1.0/mutation/attribute-mutation-default-style.js
+++ b/extensions/amp-experiment/1.0/mutation/attribute-mutation-default-style.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isAmpElement} from '#core/dom/amp-element-helpers';
 import {assertDoesNotContainDisplay, setStyles} from '#core/dom/style';
 import {dict, hasOwn} from '#core/types/object';
diff --git a/extensions/amp-experiment/1.0/mutation/attribute-mutation-default-url.js b/extensions/amp-experiment/1.0/mutation/attribute-mutation-default-url.js
index 96aacd0e19a2..b34a6ea97058 100644
--- a/extensions/amp-experiment/1.0/mutation/attribute-mutation-default-url.js
+++ b/extensions/amp-experiment/1.0/mutation/attribute-mutation-default-url.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {map} from '#core/types/object';
 
 import {assertAttributeMutationFormat} from './mutation';
diff --git a/extensions/amp-experiment/1.0/mutation/character-data-mutation.js b/extensions/amp-experiment/1.0/mutation/character-data-mutation.js
index 12db0e3a88c8..29f9c5fe5a33 100644
--- a/extensions/amp-experiment/1.0/mutation/character-data-mutation.js
+++ b/extensions/amp-experiment/1.0/mutation/character-data-mutation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {assertCharacterDataMutationFormat} from './mutation';
 
 /**
diff --git a/extensions/amp-experiment/1.0/mutation/mutation.js b/extensions/amp-experiment/1.0/mutation/mutation.js
index df0c2182d255..5a8e773a1e57 100644
--- a/extensions/amp-experiment/1.0/mutation/mutation.js
+++ b/extensions/amp-experiment/1.0/mutation/mutation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {userAssert} from '../../../../src/log';
 
 /**
diff --git a/extensions/amp-experiment/1.0/test/test-amp-experiment.js b/extensions/amp-experiment/1.0/test/test-amp-experiment.js
index 48cd97eb360a..9d23c37ea02f 100644
--- a/extensions/amp-experiment/1.0/test/test-amp-experiment.js
+++ b/extensions/amp-experiment/1.0/test/test-amp-experiment.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {toggleExperiment} from '#experiments';
 
 import {Services} from '#service';
diff --git a/extensions/amp-experiment/1.0/test/test-apply-experiment.js b/extensions/amp-experiment/1.0/test/test-apply-experiment.js
index 27b361cd85e8..cde9b8ea235a 100644
--- a/extensions/amp-experiment/1.0/test/test-apply-experiment.js
+++ b/extensions/amp-experiment/1.0/test/test-apply-experiment.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes} from '#core/dom';
 
 import {toggleExperiment} from '#experiments';
diff --git a/extensions/amp-experiment/1.0/test/test-attribute-mutation.js b/extensions/amp-experiment/1.0/test/test-attribute-mutation.js
index 7d96a352843a..55d74fed02e4 100644
--- a/extensions/amp-experiment/1.0/test/test-attribute-mutation.js
+++ b/extensions/amp-experiment/1.0/test/test-attribute-mutation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {toggleExperiment} from '#experiments';
 
 import {AttributeMutationDefaultClass} from '../mutation/attribute-mutation-default-class';
diff --git a/extensions/amp-experiment/1.0/test/test-character-data-mutation.js b/extensions/amp-experiment/1.0/test/test-character-data-mutation.js
index e5075cd99d4e..9840b9b5e376 100644
--- a/extensions/amp-experiment/1.0/test/test-character-data-mutation.js
+++ b/extensions/amp-experiment/1.0/test/test-character-data-mutation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {toggleExperiment} from '#experiments';
 
 import {CharacterDataMutation} from '../mutation/character-data-mutation';
diff --git a/extensions/amp-experiment/1.0/test/test-mutation-record.js b/extensions/amp-experiment/1.0/test/test-mutation-record.js
index a3ef550b3aa0..663fa2457a7b 100644
--- a/extensions/amp-experiment/1.0/test/test-mutation-record.js
+++ b/extensions/amp-experiment/1.0/test/test-mutation-record.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes} from '#core/dom';
 
 import {toggleExperiment} from '#experiments';
diff --git a/extensions/amp-experiment/1.0/test/test-mutation.js b/extensions/amp-experiment/1.0/test/test-mutation.js
index 0c729767a950..5af091cbd66f 100644
--- a/extensions/amp-experiment/1.0/test/test-mutation.js
+++ b/extensions/amp-experiment/1.0/test/test-mutation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {toggleExperiment} from '#experiments';
 
 import {
diff --git a/extensions/amp-experiment/1.0/test/test-variant.js b/extensions/amp-experiment/1.0/test/test-variant.js
index 78d98014ef1f..2cd86776de2a 100644
--- a/extensions/amp-experiment/1.0/test/test-variant.js
+++ b/extensions/amp-experiment/1.0/test/test-variant.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {AmpDocSingle} from '#service/ampdoc-impl';
 
diff --git a/extensions/amp-experiment/1.0/variant.js b/extensions/amp-experiment/1.0/variant.js
index 4f71d01aacde..c9a68aaf1bd1 100644
--- a/extensions/amp-experiment/1.0/variant.js
+++ b/extensions/amp-experiment/1.0/variant.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {isArray, isObject} from '#core/types';
 import {hasOwn} from '#core/types/object';
diff --git a/extensions/amp-experiment/amp-experiment.md b/extensions/amp-experiment/amp-experiment.md
index f8161bbb986e..f57709e77c1d 100644
--- a/extensions/amp-experiment/amp-experiment.md
+++ b/extensions/amp-experiment/amp-experiment.md
@@ -7,22 +7,6 @@ teaser:
   text: Used to conduct user experience experiments on AMP pages.
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-experiment
 
 ## Usage
diff --git a/extensions/amp-facebook-comments/0.1/amp-facebook-comments.js b/extensions/amp-facebook-comments/0.1/amp-facebook-comments.js
index f68a0626bdb8..8dae3d8d6f5e 100644
--- a/extensions/amp-facebook-comments/0.1/amp-facebook-comments.js
+++ b/extensions/amp-facebook-comments/0.1/amp-facebook-comments.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
 import {createLoaderLogo} from '../../amp-facebook/0.1/facebook-loader';
diff --git a/extensions/amp-facebook-comments/0.1/test/test-amp-facebook-comments.js b/extensions/amp-facebook-comments/0.1/test/test-amp-facebook-comments.js
index 966b7c9e6d07..7e339c22c4d0 100644
--- a/extensions/amp-facebook-comments/0.1/test/test-amp-facebook-comments.js
+++ b/extensions/amp-facebook-comments/0.1/test/test-amp-facebook-comments.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-facebook-comments';
 import {createElementWithAttributes} from '#core/dom';
 import {doNotLoadExternalResourcesInTest} from '#testing/iframe';
diff --git a/extensions/amp-facebook-comments/amp-facebook-comments.md b/extensions/amp-facebook-comments/amp-facebook-comments.md
index eacd95c54a22..f543dddeefab 100644
--- a/extensions/amp-facebook-comments/amp-facebook-comments.md
+++ b/extensions/amp-facebook-comments/amp-facebook-comments.md
@@ -6,22 +6,6 @@ teaser:
   text: Embeds the Facebook comments plugin.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-facebook-comments
 
 ## Usage
diff --git a/extensions/amp-facebook-like/0.1/amp-facebook-like.js b/extensions/amp-facebook-like/0.1/amp-facebook-like.js
index cae1d80b777a..6a5cd489ef34 100644
--- a/extensions/amp-facebook-like/0.1/amp-facebook-like.js
+++ b/extensions/amp-facebook-like/0.1/amp-facebook-like.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
 import {dashToUnderline} from '#core/types/string';
diff --git a/extensions/amp-facebook-like/0.1/test/test-amp-facebook-like.js b/extensions/amp-facebook-like/0.1/test/test-amp-facebook-like.js
index 52c8e355331a..7a2283d35963 100644
--- a/extensions/amp-facebook-like/0.1/test/test-amp-facebook-like.js
+++ b/extensions/amp-facebook-like/0.1/test/test-amp-facebook-like.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-facebook-like';
 import {createElementWithAttributes} from '#core/dom';
 import {facebook} from '#3p/facebook';
diff --git a/extensions/amp-facebook-like/amp-facebook-like.md b/extensions/amp-facebook-like/amp-facebook-like.md
index 6ab1da96d05e..414d1f209a1c 100644
--- a/extensions/amp-facebook-like/amp-facebook-like.md
+++ b/extensions/amp-facebook-like/amp-facebook-like.md
@@ -6,22 +6,6 @@ teaser:
   text: Embeds the Facebook like button plugin.
 ---
 
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-facebook-like
 
 ## Usage
diff --git a/extensions/amp-facebook-page/0.1/amp-facebook-page.js b/extensions/amp-facebook-page/0.1/amp-facebook-page.js
index b8a08f9215eb..ade793584eaa 100644
--- a/extensions/amp-facebook-page/0.1/amp-facebook-page.js
+++ b/extensions/amp-facebook-page/0.1/amp-facebook-page.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
 import {createLoaderLogo} from '../../amp-facebook/0.1/facebook-loader';
diff --git a/extensions/amp-facebook-page/0.1/test/test-amp-facebook-page.js b/extensions/amp-facebook-page/0.1/test/test-amp-facebook-page.js
index 931d9b1e2172..066e86cd1cdc 100644
--- a/extensions/amp-facebook-page/0.1/test/test-amp-facebook-page.js
+++ b/extensions/amp-facebook-page/0.1/test/test-amp-facebook-page.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-facebook-page';
 import {createElementWithAttributes} from '#core/dom';
 import {facebook} from '#3p/facebook';
diff --git a/extensions/amp-facebook-page/amp-facebook-page.md b/extensions/amp-facebook-page/amp-facebook-page.md
index 81eaaed2f4cd..e4e47fd25b27 100644
--- a/extensions/amp-facebook-page/amp-facebook-page.md
+++ b/extensions/amp-facebook-page/amp-facebook-page.md
@@ -6,22 +6,6 @@ teaser:
   text: Embeds the Facebook page plugin.
 ---
 
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-facebook-page
 
 ## Usage
diff --git a/extensions/amp-facebook/0.1/amp-facebook.js b/extensions/amp-facebook/0.1/amp-facebook.js
index e2ff8c974183..7bf22e42c689 100644
--- a/extensions/amp-facebook/0.1/amp-facebook.js
+++ b/extensions/amp-facebook/0.1/amp-facebook.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
 import {createLoaderLogo} from './facebook-loader';
diff --git a/extensions/amp-facebook/0.1/facebook-loader.js b/extensions/amp-facebook/0.1/facebook-loader.js
index 7d06f6bdccae..222fa9fa0f1f 100644
--- a/extensions/amp-facebook/0.1/facebook-loader.js
+++ b/extensions/amp-facebook/0.1/facebook-loader.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {htmlFor} from '#core/dom/static-template';
 
 /**
diff --git a/extensions/amp-facebook/0.1/test/test-amp-facebook.js b/extensions/amp-facebook/0.1/test/test-amp-facebook.js
index dbc9771c3728..728c6458e785 100644
--- a/extensions/amp-facebook/0.1/test/test-amp-facebook.js
+++ b/extensions/amp-facebook/0.1/test/test-amp-facebook.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-facebook';
 import {expect} from 'chai';
 import {facebook} from '#3p/facebook';
diff --git a/extensions/amp-facebook/1.0/amp-facebook.css b/extensions/amp-facebook/1.0/amp-facebook.css
index db492fb52d2f..d97d1f21ea5d 100644
--- a/extensions/amp-facebook/1.0/amp-facebook.css
+++ b/extensions/amp-facebook/1.0/amp-facebook.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * Pre-upgrade:
diff --git a/extensions/amp-facebook/1.0/amp-facebook.js b/extensions/amp-facebook/1.0/amp-facebook.js
index 2ab4d14fc750..9ffbebf3a6d5 100644
--- a/extensions/amp-facebook/1.0/amp-facebook.js
+++ b/extensions/amp-facebook/1.0/amp-facebook.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BaseElement} from './base-element';
 import {createLoaderLogo} from '../0.1/facebook-loader';
 import {dashToUnderline} from '#core/types/string';
diff --git a/extensions/amp-facebook/1.0/base-element.js b/extensions/amp-facebook/1.0/base-element.js
index 5613d7b49804..69743b352144 100644
--- a/extensions/amp-facebook/1.0/base-element.js
+++ b/extensions/amp-facebook/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Facebook} from './component';
 import {PreactBaseElement} from '#preact/base-element';
 import {dashToUnderline} from '#core/types/string';
diff --git a/extensions/amp-facebook/1.0/component.js b/extensions/amp-facebook/1.0/component.js
index bfb4e5fc5f35..790d01d299cc 100644
--- a/extensions/amp-facebook/1.0/component.js
+++ b/extensions/amp-facebook/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {MessageType, ProxyIframeEmbed} from '#preact/component/3p-frame';
 import {dashToUnderline} from '#core/types/string';
diff --git a/extensions/amp-facebook/1.0/component.type.js b/extensions/amp-facebook/1.0/component.type.js
index 3dcd3cbe5ad7..510e92fae1e9 100644
--- a/extensions/amp-facebook/1.0/component.type.js
+++ b/extensions/amp-facebook/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-facebook/1.0/storybook/Basic.amp.js b/extensions/amp-facebook/1.0/storybook/Basic.amp.js
index 3a187e5a2b9f..e1cb1d6f11e0 100644
--- a/extensions/amp-facebook/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-facebook/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {
   boolean,
diff --git a/extensions/amp-facebook/1.0/storybook/Basic.js b/extensions/amp-facebook/1.0/storybook/Basic.js
index fefadbe3be11..a5dae21bb6b5 100644
--- a/extensions/amp-facebook/1.0/storybook/Basic.js
+++ b/extensions/amp-facebook/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {Facebook} from '../component';
 import {
diff --git a/extensions/amp-facebook/1.0/test/test-amp-facebook-comments.js b/extensions/amp-facebook/1.0/test/test-amp-facebook-comments.js
index b999ddf7666e..6efc381faf1c 100644
--- a/extensions/amp-facebook/1.0/test/test-amp-facebook-comments.js
+++ b/extensions/amp-facebook/1.0/test/test-amp-facebook-comments.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-facebook';
 import {createElementWithAttributes} from '#core/dom';
 import {doNotLoadExternalResourcesInTest} from '#testing/iframe';
diff --git a/extensions/amp-facebook/1.0/test/test-amp-facebook-like.js b/extensions/amp-facebook/1.0/test/test-amp-facebook-like.js
index 59c948f498cd..422ba87d7139 100644
--- a/extensions/amp-facebook/1.0/test/test-amp-facebook-like.js
+++ b/extensions/amp-facebook/1.0/test/test-amp-facebook-like.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-facebook';
 import {createElementWithAttributes} from '#core/dom';
 import {doNotLoadExternalResourcesInTest} from '#testing/iframe';
diff --git a/extensions/amp-facebook/1.0/test/test-amp-facebook-page.js b/extensions/amp-facebook/1.0/test/test-amp-facebook-page.js
index a74e1f49d1fc..ad8d248d9f8d 100644
--- a/extensions/amp-facebook/1.0/test/test-amp-facebook-page.js
+++ b/extensions/amp-facebook/1.0/test/test-amp-facebook-page.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-facebook';
 import {createElementWithAttributes} from '#core/dom';
 import {doNotLoadExternalResourcesInTest} from 'testing/iframe';
diff --git a/extensions/amp-facebook/1.0/test/test-amp-facebook.js b/extensions/amp-facebook/1.0/test/test-amp-facebook.js
index 42ec3f8f1f09..b7e709e27f28 100644
--- a/extensions/amp-facebook/1.0/test/test-amp-facebook.js
+++ b/extensions/amp-facebook/1.0/test/test-amp-facebook.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-facebook';
 import {createElementWithAttributes} from '#core/dom';
 import {doNotLoadExternalResourcesInTest} from '#testing/iframe';
diff --git a/extensions/amp-facebook/1.0/test/test-component.js b/extensions/amp-facebook/1.0/test/test-component.js
index 12a23d22adaf..1cdaae951b78 100644
--- a/extensions/amp-facebook/1.0/test/test-component.js
+++ b/extensions/amp-facebook/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {Facebook} from '../component';
 import {WithAmpContext} from '#preact/context';
diff --git a/extensions/amp-facebook/amp-facebook.md b/extensions/amp-facebook/amp-facebook.md
index bb4ae4649070..fba7521aaf16 100644
--- a/extensions/amp-facebook/amp-facebook.md
+++ b/extensions/amp-facebook/amp-facebook.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays a Facebook post, video or comment.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-facebook
 
 ## Usage
diff --git a/extensions/amp-fit-text/0.1/amp-fit-text.css b/extensions/amp-fit-text/0.1/amp-fit-text.css
index 62026a9064e6..eea8a8078250 100644
--- a/extensions/amp-fit-text/0.1/amp-fit-text.css
+++ b/extensions/amp-fit-text/0.1/amp-fit-text.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .i-amphtml-fit-text-content,
 .i-amphtml-fit-text-content.i-amphtml-fill-content {
diff --git a/extensions/amp-fit-text/0.1/amp-fit-text.js b/extensions/amp-fit-text/0.1/amp-fit-text.js
index 19e07540f22f..f344abeb0ef0 100644
--- a/extensions/amp-fit-text/0.1/amp-fit-text.js
+++ b/extensions/amp-fit-text/0.1/amp-fit-text.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CSS} from '../../../build/amp-fit-text-0.1.css';
 import {
   applyFillContent,
diff --git a/extensions/amp-fit-text/0.1/amp-fit-text.md b/extensions/amp-fit-text/0.1/amp-fit-text.md
index bf8d3d842d81..cb272b2314af 100644
--- a/extensions/amp-fit-text/0.1/amp-fit-text.md
+++ b/extensions/amp-fit-text/0.1/amp-fit-text.md
@@ -9,22 +9,6 @@ teaser:
   text: Expands or shrinks font size to fit the content within the space given.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-fit-text
 
 ## Usage
diff --git a/extensions/amp-fit-text/0.1/test-e2e/test-amp-fit-text.js b/extensions/amp-fit-text/0.1/test-e2e/test-amp-fit-text.js
index f85ae54ab864..36e93d424752 100644
--- a/extensions/amp-fit-text/0.1/test-e2e/test-amp-fit-text.js
+++ b/extensions/amp-fit-text/0.1/test-e2e/test-amp-fit-text.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-fit-text',
   {
diff --git a/extensions/amp-fit-text/0.1/test/test-amp-fit-text.js b/extensions/amp-fit-text/0.1/test/test-amp-fit-text.js
index 9a1d8f34c240..80fac7589ab7 100644
--- a/extensions/amp-fit-text/0.1/test/test-amp-fit-text.js
+++ b/extensions/amp-fit-text/0.1/test/test-amp-fit-text.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes} from '#core/dom';
 import {
   AmpFitText,
diff --git a/extensions/amp-fit-text/1.0/amp-fit-text.css b/extensions/amp-fit-text/1.0/amp-fit-text.css
index fbd6b3b734e1..cb5c95dfb3bb 100644
--- a/extensions/amp-fit-text/1.0/amp-fit-text.css
+++ b/extensions/amp-fit-text/1.0/amp-fit-text.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * Pre-upgrade:
diff --git a/extensions/amp-fit-text/1.0/amp-fit-text.js b/extensions/amp-fit-text/1.0/amp-fit-text.js
index 241ee22bf564..21a5e9428a92 100644
--- a/extensions/amp-fit-text/1.0/amp-fit-text.js
+++ b/extensions/amp-fit-text/1.0/amp-fit-text.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BaseElement} from './base-element';
 import {CSS} from '../../../build/amp-fit-text-1.0.css';
 import {isExperimentOn} from '#experiments';
diff --git a/extensions/amp-fit-text/1.0/base-element.js b/extensions/amp-fit-text/1.0/base-element.js
index 9df52c7de41a..ac60fec67f32 100644
--- a/extensions/amp-fit-text/1.0/base-element.js
+++ b/extensions/amp-fit-text/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CSS} from './component.jss';
 import {BentoFitText} from './component';
 import {PreactBaseElement} from '#preact/base-element';
diff --git a/extensions/amp-fit-text/1.0/component.js b/extensions/amp-fit-text/1.0/component.js
index 87bcf131eaa9..f2e1c238803f 100644
--- a/extensions/amp-fit-text/1.0/component.js
+++ b/extensions/amp-fit-text/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {ContainWrapper} from '#preact/component';
 import {LINE_HEIGHT_EM_, useStyles} from './component.jss';
diff --git a/extensions/amp-fit-text/1.0/component.jss.js b/extensions/amp-fit-text/1.0/component.jss.js
index d35a7fea6454..5b61b8e9f7ee 100644
--- a/extensions/amp-fit-text/1.0/component.jss.js
+++ b/extensions/amp-fit-text/1.0/component.jss.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createUseStyles} from 'react-jss';
 
 export const LINE_HEIGHT_EM_ = 1.15;
diff --git a/extensions/amp-fit-text/1.0/component.type.js b/extensions/amp-fit-text/1.0/component.type.js
index 238bb181730f..064b99fe35dc 100644
--- a/extensions/amp-fit-text/1.0/component.type.js
+++ b/extensions/amp-fit-text/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-fit-text/1.0/storybook/Basic.amp.js b/extensions/amp-fit-text/1.0/storybook/Basic.amp.js
index ffa165d9c876..2b22eb81abf2 100644
--- a/extensions/amp-fit-text/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-fit-text/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {number, text, withKnobs} from '@storybook/addon-knobs';
 import {withAmp} from '@ampproject/storybook-addon';
diff --git a/extensions/amp-fit-text/1.0/storybook/Basic.js b/extensions/amp-fit-text/1.0/storybook/Basic.js
index ce8799b794db..acd785ddd89d 100644
--- a/extensions/amp-fit-text/1.0/storybook/Basic.js
+++ b/extensions/amp-fit-text/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {BentoFitText} from '../component';
 import {number, text, withKnobs} from '@storybook/addon-knobs';
diff --git a/extensions/amp-fit-text/1.0/test-e2e/test-amp-fit-text.js b/extensions/amp-fit-text/1.0/test-e2e/test-amp-fit-text.js
index d83d70503ef1..b45c5d074d93 100644
--- a/extensions/amp-fit-text/1.0/test-e2e/test-amp-fit-text.js
+++ b/extensions/amp-fit-text/1.0/test-e2e/test-amp-fit-text.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * TODO: The timeout is increased for cross-light/shadow DOM traversal.
  * This should be removed, but currently without it the tests are flaky.
diff --git a/extensions/amp-fit-text/1.0/test/test-amp-fit-text.js b/extensions/amp-fit-text/1.0/test/test-amp-fit-text.js
index 3b780825c909..c205a33d8401 100644
--- a/extensions/amp-fit-text/1.0/test/test-amp-fit-text.js
+++ b/extensions/amp-fit-text/1.0/test/test-amp-fit-text.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-fit-text';
 import {computedStyle} from '#core/dom/style';
 import {createElementWithAttributes} from '#core/dom';
diff --git a/extensions/amp-fit-text/1.0/test/test-component.js b/extensions/amp-fit-text/1.0/test/test-component.js
index 209045e1a2a1..a2ae35e873c8 100644
--- a/extensions/amp-fit-text/1.0/test/test-component.js
+++ b/extensions/amp-fit-text/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {BentoFitText, calculateFontSize, setOverflowStyle} from '../component';
 import {computedStyle} from '#core/dom/style';
diff --git a/extensions/amp-fit-text/amp-fit-text.md b/extensions/amp-fit-text/amp-fit-text.md
index ed3240d6182d..7fbae3567f00 100644
--- a/extensions/amp-fit-text/amp-fit-text.md
+++ b/extensions/amp-fit-text/amp-fit-text.md
@@ -8,22 +8,6 @@ experimental: true
 bento: true
 ---
 
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-fit-text
 
 ## Usage
diff --git a/extensions/amp-font/0.1/amp-font.js b/extensions/amp-font/0.1/amp-font.js
index 1fd9880e2597..66175ee9ea66 100644
--- a/extensions/amp-font/0.1/amp-font.js
+++ b/extensions/amp-font/0.1/amp-font.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Triggers and monitors loading of custom fonts on AMP pages.
  * Example:
diff --git a/extensions/amp-font/0.1/fontloader.js b/extensions/amp-font/0.1/fontloader.js
index 8f447197a5bc..0a9e026a272a 100644
--- a/extensions/amp-font/0.1/fontloader.js
+++ b/extensions/amp-font/0.1/fontloader.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeElement} from '#core/dom';
 import {setStyles} from '#core/dom/style';
 
diff --git a/extensions/amp-font/0.1/test/test-amp-font.js b/extensions/amp-font/0.1/test/test-amp-font.js
index 51dbbe3bf8fd..41e87a447ad1 100644
--- a/extensions/amp-font/0.1/test/test-amp-font.js
+++ b/extensions/amp-font/0.1/test/test-amp-font.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-font';
 import {FontLoader} from '../fontloader';
 
diff --git a/extensions/amp-font/0.1/test/test-fontloader.js b/extensions/amp-font/0.1/test/test-fontloader.js
index 5440f9cc94c8..794a162113dc 100644
--- a/extensions/amp-font/0.1/test/test-fontloader.js
+++ b/extensions/amp-font/0.1/test/test-fontloader.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {FontLoader} from '../fontloader';
 
 describes.repeated(
diff --git a/extensions/amp-font/amp-font.md b/extensions/amp-font/amp-font.md
index 0b0768f87234..e056ffb30eb6 100644
--- a/extensions/amp-font/amp-font.md
+++ b/extensions/amp-font/amp-font.md
@@ -9,22 +9,6 @@ teaser:
   text: Trigger and monitor the loading of custom fonts on AMP pages.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-font (deprecated)
 
 [tip type="warning"]
diff --git a/extensions/amp-form/0.1/amp-form-textarea.js b/extensions/amp-form/0.1/amp-form-textarea.js
index a3bd6aa0fc7e..acba239f5ad0 100644
--- a/extensions/amp-form/0.1/amp-form-textarea.js
+++ b/extensions/amp-form/0.1/amp-form-textarea.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 import {iterateCursor, removeElement} from '#core/dom';
 import {computedStyle, px, setStyle} from '#core/dom/style';
diff --git a/extensions/amp-form/0.1/amp-form.css b/extensions/amp-form/0.1/amp-form.css
index 50f7eaebf74e..c44ee3a3ce9d 100644
--- a/extensions/amp-form/0.1/amp-form.css
+++ b/extensions/amp-form/0.1/amp-form.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 form.amp-form-submitting [submitting],
 form.amp-form-submit-success [submit-success],
diff --git a/extensions/amp-form/0.1/amp-form.js b/extensions/amp-form/0.1/amp-form.js
index ed60ce3e8fc2..1c08785d5d83 100644
--- a/extensions/amp-form/0.1/amp-form.js
+++ b/extensions/amp-form/0.1/amp-form.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {AmpEvents} from '#core/constants/amp-events';
 import {
diff --git a/extensions/amp-form/0.1/form-dirtiness.js b/extensions/amp-form/0.1/form-dirtiness.js
index 8ed8f5bb6050..6bce4afacf2f 100644
--- a/extensions/amp-form/0.1/form-dirtiness.js
+++ b/extensions/amp-form/0.1/form-dirtiness.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 import {isDisabled, isFieldDefault, isFieldEmpty} from '#core/dom/form';
 import {dict, map} from '#core/types/object';
diff --git a/extensions/amp-form/0.1/form-events.js b/extensions/amp-form/0.1/form-events.js
index 88ea24788a74..36b291866df4 100644
--- a/extensions/amp-form/0.1/form-events.js
+++ b/extensions/amp-form/0.1/form-events.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @enum {string} */
 export const FormEvents = {
   INVALID: 'invalid',
diff --git a/extensions/amp-form/0.1/form-proxy.js b/extensions/amp-form/0.1/form-proxy.js
index 291539b6a219..c8215ff76cd6 100644
--- a/extensions/amp-form/0.1/form-proxy.js
+++ b/extensions/amp-form/0.1/form-proxy.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {toWin} from '#core/window';
 
 import {Services} from '#service';
diff --git a/extensions/amp-form/0.1/form-submit-service.js b/extensions/amp-form/0.1/form-submit-service.js
index 3276a9cd63f0..c43dbe0a649a 100644
--- a/extensions/amp-form/0.1/form-submit-service.js
+++ b/extensions/amp-form/0.1/form-submit-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Observable} from '#core/data-structures/observable';
 
 /**
diff --git a/extensions/amp-form/0.1/form-validators.js b/extensions/amp-form/0.1/form-validators.js
index 04e41502a586..5a6fee040842 100644
--- a/extensions/amp-form/0.1/form-validators.js
+++ b/extensions/amp-form/0.1/form-validators.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {iterateCursor} from '#core/dom';
 import {toWin} from '#core/window';
 
diff --git a/extensions/amp-form/0.1/form-verifiers.js b/extensions/amp-form/0.1/form-verifiers.js
index f746dfef246f..5506f727a787 100644
--- a/extensions/amp-form/0.1/form-verifiers.js
+++ b/extensions/amp-form/0.1/form-verifiers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {LastAddedResolver} from '#core/data-structures/promise';
 import {iterateCursor} from '#core/dom';
 import {isFieldDefault} from '#core/dom/form';
diff --git a/extensions/amp-form/0.1/test-e2e/test-custom-validation-reporting.js b/extensions/amp-form/0.1/test-e2e/test-custom-validation-reporting.js
index 7798cbae6e59..1a380950b338 100644
--- a/extensions/amp-form/0.1/test-e2e/test-custom-validation-reporting.js
+++ b/extensions/amp-form/0.1/test-e2e/test-custom-validation-reporting.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Key} from '#testing/helpers/types';
 
 const expectedSubmitUrl =
diff --git a/extensions/amp-form/0.1/test-e2e/test-ssr.js b/extensions/amp-form/0.1/test-e2e/test-ssr.js
index 7202f8be9e27..027226c53228 100644
--- a/extensions/amp-form/0.1/test-e2e/test-ssr.js
+++ b/extensions/amp-form/0.1/test-e2e/test-ssr.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-form',
   {
diff --git a/extensions/amp-form/0.1/test/integration/test-integration-form-verifiers.js b/extensions/amp-form/0.1/test/integration/test-integration-form-verifiers.js
index 9c925cef3d64..6b7aa6177045 100644
--- a/extensions/amp-form/0.1/test/integration/test-integration-form-verifiers.js
+++ b/extensions/amp-form/0.1/test/integration/test-integration-form-verifiers.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {poll} from '#testing/iframe';
 
 const RENDER_TIMEOUT = 15000;
diff --git a/extensions/amp-form/0.1/test/integration/test-integration-form.js b/extensions/amp-form/0.1/test/integration/test-integration-form.js
index 8e3f0a875897..c406c2ee48dc 100644
--- a/extensions/amp-form/0.1/test/integration/test-integration-form.js
+++ b/extensions/amp-form/0.1/test/integration/test-integration-form.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 
 import {Services} from '#service';
diff --git a/extensions/amp-form/0.1/test/test-amp-form-textarea.js b/extensions/amp-form/0.1/test/test-amp-form-textarea.js
index 773c63bf3fbf..d524bff68339 100644
--- a/extensions/amp-form/0.1/test/test-amp-form-textarea.js
+++ b/extensions/amp-form/0.1/test/test-amp-form-textarea.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {CSS} from '../../../../build/amp-form-0.1.css';
diff --git a/extensions/amp-form/0.1/test/test-amp-form.js b/extensions/amp-form/0.1/test/test-amp-form.js
index 762eb2c5ae4f..0bfa6f06abcb 100644
--- a/extensions/amp-form/0.1/test/test-amp-form.js
+++ b/extensions/amp-form/0.1/test/test-amp-form.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../../../amp-mustache/0.1/amp-mustache';
 import {ActionTrust} from '#core/constants/action-constants';
 import {AmpEvents} from '#core/constants/amp-events';
diff --git a/extensions/amp-form/0.1/test/test-form-dirtiness.js b/extensions/amp-form/0.1/test/test-form-dirtiness.js
index 79847cc9181e..b3135270ac6f 100644
--- a/extensions/amp-form/0.1/test/test-form-dirtiness.js
+++ b/extensions/amp-form/0.1/test/test-form-dirtiness.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 import {closestAncestorElementBySelector} from '#core/dom/query';
 
diff --git a/extensions/amp-form/0.1/test/test-form-proxy.js b/extensions/amp-form/0.1/test/test-form-proxy.js
index 75d5356dcfa3..c91b2bc39b7c 100644
--- a/extensions/amp-form/0.1/test/test-form-proxy.js
+++ b/extensions/amp-form/0.1/test/test-form-proxy.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Services} from '#service';
 
 import {parseUrlDeprecated} from '../../../../src/url';
diff --git a/extensions/amp-form/0.1/test/test-form-submit-service.js b/extensions/amp-form/0.1/test/test-form-submit-service.js
index 3de0003067a9..3eeb2df3afb0 100644
--- a/extensions/amp-form/0.1/test/test-form-submit-service.js
+++ b/extensions/amp-form/0.1/test/test-form-submit-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {FormSubmitService} from '../form-submit-service';
 
 describes.sandboxed('form-submit-service', {}, (env) => {
diff --git a/extensions/amp-form/0.1/test/test-form-validators.js b/extensions/amp-form/0.1/test/test-form-validators.js
index c5c1b03b7206..036b21c13952 100644
--- a/extensions/amp-form/0.1/test/test-form-validators.js
+++ b/extensions/amp-form/0.1/test/test-form-validators.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {
diff --git a/extensions/amp-form/0.1/test/test-form-verifiers.js b/extensions/amp-form/0.1/test/test-form-verifiers.js
index bff82b8f2fb9..e28c83cc1df9 100644
--- a/extensions/amp-form/0.1/test/test-form-verifiers.js
+++ b/extensions/amp-form/0.1/test/test-form-verifiers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   AsyncVerifier,
   DefaultVerifier,
diff --git a/extensions/amp-form/0.1/test/test-validation-bubble.js b/extensions/amp-form/0.1/test/test-validation-bubble.js
index d7c9d63eca92..48551a0528f5 100644
--- a/extensions/amp-form/0.1/test/test-validation-bubble.js
+++ b/extensions/amp-form/0.1/test/test-validation-bubble.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ValidationBubble} from '../validation-bubble';
 
 describes.realWin('validation-bubble', {amp: true}, (env) => {
diff --git a/extensions/amp-form/0.1/validation-bubble.js b/extensions/amp-form/0.1/validation-bubble.js
index 0e8f9ab5a4a7..3c23d3907afa 100644
--- a/extensions/amp-form/0.1/validation-bubble.js
+++ b/extensions/amp-form/0.1/validation-bubble.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeChildren} from '#core/dom';
 import {setStyles, toggle} from '#core/dom/style';
 
diff --git a/extensions/amp-form/amp-form.md b/extensions/amp-form/amp-form.md
index 02a2b75c8a24..4d7a7ec66c31 100644
--- a/extensions/amp-form/amp-form.md
+++ b/extensions/amp-form/amp-form.md
@@ -8,22 +8,6 @@ teaser:
   text: Allows you to create forms to submit input fields in an AMP document.
 ---
 
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-form
 
 ## Usage
diff --git a/extensions/amp-fx-collection/0.1/amp-fx-collection.js b/extensions/amp-fx-collection/0.1/amp-fx-collection.js
index 5bb1c3ff5052..624e5c020ba4 100644
--- a/extensions/amp-fx-collection/0.1/amp-fx-collection.js
+++ b/extensions/amp-fx-collection/0.1/amp-fx-collection.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 import {iterateCursor} from '#core/dom';
 import {tryCallback} from '#core/error';
diff --git a/extensions/amp-fx-collection/0.1/fx-type.js b/extensions/amp-fx-collection/0.1/fx-type.js
index c61be9f9d42f..a55ca0c8dbb2 100644
--- a/extensions/amp-fx-collection/0.1/fx-type.js
+++ b/extensions/amp-fx-collection/0.1/fx-type.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {devAssert, user, userAssert} from '../../../src/log';
 
 const TAG = 'amp-fx-collection';
diff --git a/extensions/amp-fx-collection/0.1/providers/amp-fx-presets-utils.js b/extensions/amp-fx-collection/0.1/providers/amp-fx-presets-utils.js
index f24ff9c0017c..3ca24fc4b05f 100644
--- a/extensions/amp-fx-collection/0.1/providers/amp-fx-presets-utils.js
+++ b/extensions/amp-fx-collection/0.1/providers/amp-fx-presets-utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Common animations utility functions used in the amp-fx
  * presets.
diff --git a/extensions/amp-fx-collection/0.1/providers/amp-fx-presets.js b/extensions/amp-fx-collection/0.1/providers/amp-fx-presets.js
index 294c96b08dd5..2c739d778855 100644
--- a/extensions/amp-fx-collection/0.1/providers/amp-fx-presets.js
+++ b/extensions/amp-fx-collection/0.1/providers/amp-fx-presets.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   assertDoesNotContainDisplay,
   computedStyle,
diff --git a/extensions/amp-fx-collection/0.1/providers/fx-provider.js b/extensions/amp-fx-collection/0.1/providers/fx-provider.js
index fdee3f388785..a1fc1dd0d1e6 100644
--- a/extensions/amp-fx-collection/0.1/providers/fx-provider.js
+++ b/extensions/amp-fx-collection/0.1/providers/fx-provider.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   assertDoesNotContainDisplay,
   computedStyle,
diff --git a/extensions/amp-fx-collection/0.1/scroll-toggle.js b/extensions/amp-fx-collection/0.1/scroll-toggle.js
index 05402fd088d5..f9444d59ff77 100644
--- a/extensions/amp-fx-collection/0.1/scroll-toggle.js
+++ b/extensions/amp-fx-collection/0.1/scroll-toggle.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Observable} from '#core/data-structures/observable';
 import {px, setImportantStyles} from '#core/dom/style';
 import {once} from '#core/types/function';
diff --git a/extensions/amp-fx-collection/0.1/test/integration/test-amp-fx-fade-in-scroll.js b/extensions/amp-fx-collection/0.1/test/integration/test-amp-fx-fade-in-scroll.js
index 69905c8d3edf..832599ced01e 100644
--- a/extensions/amp-fx-collection/0.1/test/integration/test-amp-fx-fade-in-scroll.js
+++ b/extensions/amp-fx-collection/0.1/test/integration/test-amp-fx-fade-in-scroll.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * This is a somewhat arbitrary time just intended to allow the browser to
  * render a new frame. A more robust approach would be to refactor the test
diff --git a/extensions/amp-fx-collection/0.1/test/integration/test-amp-fx-fade-in.js b/extensions/amp-fx-collection/0.1/test/integration/test-amp-fx-fade-in.js
index eba40533e240..02cc9fbceba8 100644
--- a/extensions/amp-fx-collection/0.1/test/integration/test-amp-fx-fade-in.js
+++ b/extensions/amp-fx-collection/0.1/test/integration/test-amp-fx-fade-in.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const config = describes.sandboxed.configure().ifChrome();
 config.run('amp-fx-collection', {}, function () {
   const css = `
diff --git a/extensions/amp-fx-collection/0.1/test/integration/test-amp-fx-fly-in.js b/extensions/amp-fx-collection/0.1/test/integration/test-amp-fx-fly-in.js
index d6b0af7ea57c..ab72224b1a8d 100644
--- a/extensions/amp-fx-collection/0.1/test/integration/test-amp-fx-fly-in.js
+++ b/extensions/amp-fx-collection/0.1/test/integration/test-amp-fx-fly-in.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isExperimentOn, toggleExperiment} from '#experiments';
 
 describes.sandboxed.skip('amp-fx-collection', {}, function () {
diff --git a/extensions/amp-fx-collection/0.1/test/integration/test-amp-fx-parallax.js b/extensions/amp-fx-collection/0.1/test/integration/test-amp-fx-parallax.js
index fce9444ae736..dfcdcf10ae79 100644
--- a/extensions/amp-fx-collection/0.1/test/integration/test-amp-fx-parallax.js
+++ b/extensions/amp-fx-collection/0.1/test/integration/test-amp-fx-parallax.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const config = describes.sandboxed.configure().ifChrome();
 config.run('amp-fx-collection', {}, function () {
   const css = `
diff --git a/extensions/amp-fx-collection/0.1/test/test-amp-fx-collection.js b/extensions/amp-fx-collection/0.1/test/test-amp-fx-collection.js
index 17419c15000d..acaa37968cf8 100644
--- a/extensions/amp-fx-collection/0.1/test/test-amp-fx-collection.js
+++ b/extensions/amp-fx-collection/0.1/test/test-amp-fx-collection.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes} from '#core/dom';
 
 import {AmpFxCollection} from '../amp-fx-collection';
diff --git a/extensions/amp-fx-collection/0.1/test/test-fx-type.js b/extensions/amp-fx-collection/0.1/test/test-fx-type.js
index e906f8457edc..fbcd7fd422fe 100644
--- a/extensions/amp-fx-collection/0.1/test/test-fx-type.js
+++ b/extensions/amp-fx-collection/0.1/test/test-fx-type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   FxBindings,
   FxType,
diff --git a/extensions/amp-fx-collection/amp-fx-collection.md b/extensions/amp-fx-collection/amp-fx-collection.md
index 17da3070bbcc..76cf569e105d 100644
--- a/extensions/amp-fx-collection/amp-fx-collection.md
+++ b/extensions/amp-fx-collection/amp-fx-collection.md
@@ -6,22 +6,6 @@ teaser:
   text: Provides a collection of preset visual effects, such as parallax.
 ---
 
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-fx-collection
 
 ## Usage
diff --git a/extensions/amp-fx-flying-carpet/0.1/amp-fx-flying-carpet.css b/extensions/amp-fx-flying-carpet/0.1/amp-fx-flying-carpet.css
index a6c3b9686600..09cd0a9773be 100644
--- a/extensions/amp-fx-flying-carpet/0.1/amp-fx-flying-carpet.css
+++ b/extensions/amp-fx-flying-carpet/0.1/amp-fx-flying-carpet.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /* Non-overridable properties */
 amp-fx-flying-carpet {
diff --git a/extensions/amp-fx-flying-carpet/0.1/amp-fx-flying-carpet.js b/extensions/amp-fx-flying-carpet/0.1/amp-fx-flying-carpet.js
index 7f86149cacbb..9d437e427bf6 100644
--- a/extensions/amp-fx-flying-carpet/0.1/amp-fx-flying-carpet.js
+++ b/extensions/amp-fx-flying-carpet/0.1/amp-fx-flying-carpet.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CommonSignals} from '#core/constants/common-signals';
 import {Layout} from '#core/dom/layout';
 import {realChildElements, realChildNodes} from '#core/dom/query';
diff --git a/extensions/amp-fx-flying-carpet/0.1/test/test-amp-fx-flying-carpet.js b/extensions/amp-fx-flying-carpet/0.1/test/test-amp-fx-flying-carpet.js
index 5cff6939990d..87dfa86333e3 100644
--- a/extensions/amp-fx-flying-carpet/0.1/test/test-amp-fx-flying-carpet.js
+++ b/extensions/amp-fx-flying-carpet/0.1/test/test-amp-fx-flying-carpet.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-fx-flying-carpet';
 import {Services} from '#service';
 import {Resource} from '#service/resource';
diff --git a/extensions/amp-fx-flying-carpet/amp-fx-flying-carpet.md b/extensions/amp-fx-flying-carpet/amp-fx-flying-carpet.md
index 3492b4fd7343..956ec1902a0d 100644
--- a/extensions/amp-fx-flying-carpet/amp-fx-flying-carpet.md
+++ b/extensions/amp-fx-flying-carpet/amp-fx-flying-carpet.md
@@ -6,22 +6,6 @@ teaser:
   text: Wraps its children in a unique full-screen scrolling container allowing you to display a full-screen ad without taking up the entire viewport.
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-fx-flying-carpet
 
 ## Usage
diff --git a/extensions/amp-geo/0.1/amp-geo-in-group.js b/extensions/amp-geo/0.1/amp-geo-in-group.js
index 4df6fbfb38cc..984e43f6e52d 100644
--- a/extensions/amp-geo/0.1/amp-geo-in-group.js
+++ b/extensions/amp-geo/0.1/amp-geo-in-group.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @enum {number}
  */
diff --git a/extensions/amp-geo/0.1/amp-geo-presets.js b/extensions/amp-geo/0.1/amp-geo-presets.js
index 57e019774149..7514b4c4d44d 100644
--- a/extensions/amp-geo/0.1/amp-geo-presets.js
+++ b/extensions/amp-geo/0.1/amp-geo-presets.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * CAUTION
  * This file is partly machine generated, DO NOT HAND EDIT.
diff --git a/extensions/amp-geo/0.1/amp-geo.js b/extensions/amp-geo/0.1/amp-geo.js
index 0987c442443e..f2d961d67c56 100644
--- a/extensions/amp-geo/0.1/amp-geo.js
+++ b/extensions/amp-geo/0.1/amp-geo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Sets location specific CSS, bind variables, and attributes on
  * AMP pages
diff --git a/extensions/amp-geo/0.1/test/test-amp-geo.js b/extensions/amp-geo/0.1/test/test-amp-geo.js
index 6783371afdc3..b1ad8dac849a 100644
--- a/extensions/amp-geo/0.1/test/test-amp-geo.js
+++ b/extensions/amp-geo/0.1/test/test-amp-geo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {vsyncForTesting} from '#service/vsync-impl';
 
diff --git a/extensions/amp-geo/amp-geo.md b/extensions/amp-geo/amp-geo.md
index 09ea72f436dd..737d30c2dee3 100644
--- a/extensions/amp-geo/amp-geo.md
+++ b/extensions/amp-geo/amp-geo.md
@@ -7,22 +7,6 @@ teaser:
   text: Provides an approximate country-level geolocation interface.
 ---
 
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-geo
 
 ## Usage
diff --git a/extensions/amp-gfycat/0.1/amp-gfycat.js b/extensions/amp-gfycat/0.1/amp-gfycat.js
index 56f59060f8de..a8c19d83b040 100644
--- a/extensions/amp-gfycat/0.1/amp-gfycat.js
+++ b/extensions/amp-gfycat/0.1/amp-gfycat.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   dispatchCustomEvent,
   getDataParamsFromAttributes,
diff --git a/extensions/amp-gfycat/0.1/test/test-amp-gfycat.js b/extensions/amp-gfycat/0.1/test/test-amp-gfycat.js
index a271d6c6c7ab..24e6cc9d6a93 100644
--- a/extensions/amp-gfycat/0.1/test/test-amp-gfycat.js
+++ b/extensions/amp-gfycat/0.1/test/test-amp-gfycat.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-gfycat';
 import {listenOncePromise} from '../../../../src/event-helper';
 import {VideoEvents} from '../../../../src/video-interface';
diff --git a/extensions/amp-gfycat/amp-gfycat.md b/extensions/amp-gfycat/amp-gfycat.md
index 2d7fc9af25c9..898b9cdd00b0 100644
--- a/extensions/amp-gfycat/amp-gfycat.md
+++ b/extensions/amp-gfycat/amp-gfycat.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays a Gfycat video GIF.
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-gfycat
 
 ## Example
diff --git a/extensions/amp-gist/0.1/amp-gist.js b/extensions/amp-gist/0.1/amp-gist.js
index 01d740ddfa12..b19043dd7456 100644
--- a/extensions/amp-gist/0.1/amp-gist.js
+++ b/extensions/amp-gist/0.1/amp-gist.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Embeds a Github gist
  *
diff --git a/extensions/amp-gist/0.1/test/test-amp-gist.js b/extensions/amp-gist/0.1/test/test-amp-gist.js
index 12a97399608d..5aaf0056a9aa 100644
--- a/extensions/amp-gist/0.1/test/test-amp-gist.js
+++ b/extensions/amp-gist/0.1/test/test-amp-gist.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-gist';
 
 describes.realWin(
diff --git a/extensions/amp-google-document-embed/0.1/amp-google-document-embed.js b/extensions/amp-google-document-embed/0.1/amp-google-document-embed.js
index 205d9a765653..172d8a3fa940 100644
--- a/extensions/amp-google-document-embed/0.1/amp-google-document-embed.js
+++ b/extensions/amp-google-document-embed/0.1/amp-google-document-embed.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Embeds the Google Docs viewer
  *
diff --git a/extensions/amp-google-document-embed/0.1/test/test-amp-google-document-embed.js b/extensions/amp-google-document-embed/0.1/test/test-amp-google-document-embed.js
index 41cb195143e3..3796f74021b9 100644
--- a/extensions/amp-google-document-embed/0.1/test/test-amp-google-document-embed.js
+++ b/extensions/amp-google-document-embed/0.1/test/test-amp-google-document-embed.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-google-document-embed';
 
 describes.realWin(
diff --git a/extensions/amp-google-document-embed/amp-google-document-embed.md b/extensions/amp-google-document-embed/amp-google-document-embed.md
index d5bcd0419695..4764048a8856 100644
--- a/extensions/amp-google-document-embed/amp-google-document-embed.md
+++ b/extensions/amp-google-document-embed/amp-google-document-embed.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays a document file supported by Google Drive.
 ---
 
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-google-document-embed
 
 ## Usage
diff --git a/extensions/amp-gwd-animation/0.1/amp-gwd-animation-impl.js b/extensions/amp-gwd-animation/0.1/amp-gwd-animation-impl.js
index 16b7d4f5e226..240a5c8650da 100644
--- a/extensions/amp-gwd-animation/0.1/amp-gwd-animation-impl.js
+++ b/extensions/amp-gwd-animation/0.1/amp-gwd-animation-impl.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {waitForChild} from '#core/dom';
 import {escapeCssSelectorIdent} from '#core/dom/css-selectors';
 import {scopedQuerySelector} from '#core/dom/query';
diff --git a/extensions/amp-gwd-animation/0.1/amp-gwd-animation.css b/extensions/amp-gwd-animation/0.1/amp-gwd-animation.css
index 4e67b7885cb1..ee62147cd635 100644
--- a/extensions/amp-gwd-animation/0.1/amp-gwd-animation.css
+++ b/extensions/amp-gwd-animation/0.1/amp-gwd-animation.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /**
  * Class used to disable GWD animations.
diff --git a/extensions/amp-gwd-animation/0.1/amp-gwd-animation.js b/extensions/amp-gwd-animation/0.1/amp-gwd-animation.js
index c394a887a01d..5494cd4733f1 100644
--- a/extensions/amp-gwd-animation/0.1/amp-gwd-animation.js
+++ b/extensions/amp-gwd-animation/0.1/amp-gwd-animation.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {ActionTrust} from '#core/constants/action-constants';
 
 import {Services} from '#service';
diff --git a/extensions/amp-gwd-animation/0.1/test/test-amp-gwd-animation.js b/extensions/amp-gwd-animation/0.1/test/test-amp-gwd-animation.js
index a8026f00ff6b..04eb55882352 100644
--- a/extensions/amp-gwd-animation/0.1/test/test-amp-gwd-animation.js
+++ b/extensions/amp-gwd-animation/0.1/test/test-amp-gwd-animation.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Services} from '#service';
 
 import {createCustomEvent} from '../../../../src/event-helper';
diff --git a/extensions/amp-hulu/0.1/amp-hulu.js b/extensions/amp-hulu/0.1/amp-hulu.js
index 54899b89fcf9..c20b3067c786 100644
--- a/extensions/amp-hulu/0.1/amp-hulu.js
+++ b/extensions/amp-hulu/0.1/amp-hulu.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeElement} from '#core/dom';
 import {applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
 
diff --git a/extensions/amp-hulu/0.1/test/test-amp-hulu.js b/extensions/amp-hulu/0.1/test/test-amp-hulu.js
index ca74f1ffc2b2..79d924edac38 100644
--- a/extensions/amp-hulu/0.1/test/test-amp-hulu.js
+++ b/extensions/amp-hulu/0.1/test/test-amp-hulu.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-hulu';
 
 describes.realWin(
diff --git a/extensions/amp-hulu/amp-hulu.md b/extensions/amp-hulu/amp-hulu.md
index 4b33241e52d0..ea659ae19de6 100644
--- a/extensions/amp-hulu/amp-hulu.md
+++ b/extensions/amp-hulu/amp-hulu.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays an embedded Hulu video.
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-hulu
 
 ## Usage
diff --git a/extensions/amp-iframe/0.1/amp-iframe.js b/extensions/amp-iframe/0.1/amp-iframe.js
index daf2f30f0ec9..004a701af84d 100644
--- a/extensions/amp-iframe/0.1/amp-iframe.js
+++ b/extensions/amp-iframe/0.1/amp-iframe.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AMPDOC_SINGLETON_NAME} from '#core/constants/enums';
 import {ActionTrust} from '#core/constants/action-constants';
 import {IntersectionObserver3pHost} from '../../../src/utils/intersection-observer-3p-host';
diff --git a/extensions/amp-iframe/0.1/amp-iframe.md b/extensions/amp-iframe/0.1/amp-iframe.md
index 5e2d361e2a08..10502779deb7 100644
--- a/extensions/amp-iframe/0.1/amp-iframe.md
+++ b/extensions/amp-iframe/0.1/amp-iframe.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays an iframe.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-iframe
 
 ## Usage
diff --git a/extensions/amp-iframe/0.1/storybook/Basic.amp.js b/extensions/amp-iframe/0.1/storybook/Basic.amp.js
index 8ce369154e35..614d1d500dc5 100644
--- a/extensions/amp-iframe/0.1/storybook/Basic.amp.js
+++ b/extensions/amp-iframe/0.1/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {withAmp} from '@ampproject/storybook-addon';
 import {withKnobs} from '@storybook/addon-knobs';
diff --git a/extensions/amp-iframe/0.1/test/test-amp-iframe.js b/extensions/amp-iframe/0.1/test/test-amp-iframe.js
index 95df4bbe8ba4..52112e206ac8 100644
--- a/extensions/amp-iframe/0.1/test/test-amp-iframe.js
+++ b/extensions/amp-iframe/0.1/test/test-amp-iframe.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {AmpIframe, setTrackingIframeTimeoutForTesting} from '../amp-iframe';
 import {CommonSignals} from '#core/constants/common-signals';
diff --git a/extensions/amp-iframe/1.0/amp-iframe.js b/extensions/amp-iframe/1.0/amp-iframe.js
index b3820d660296..b73aef56b2df 100644
--- a/extensions/amp-iframe/1.0/amp-iframe.js
+++ b/extensions/amp-iframe/1.0/amp-iframe.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BaseElement} from './base-element';
 import {isExperimentOn} from '#experiments';
 import {userAssert} from '../../../src/log';
diff --git a/extensions/amp-iframe/1.0/base-element.js b/extensions/amp-iframe/1.0/base-element.js
index 9f52ffcc7428..da4e300afe78 100644
--- a/extensions/amp-iframe/1.0/base-element.js
+++ b/extensions/amp-iframe/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Iframe} from './component';
 import {PreactBaseElement} from '#preact/base-element';
 
diff --git a/extensions/amp-iframe/1.0/component.js b/extensions/amp-iframe/1.0/component.js
index 98285d060999..6351c573c52f 100644
--- a/extensions/amp-iframe/1.0/component.js
+++ b/extensions/amp-iframe/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 
 const NOOP = () => {};
diff --git a/extensions/amp-iframe/1.0/component.type.js b/extensions/amp-iframe/1.0/component.type.js
index faa126fd0a0c..24e726096b87 100644
--- a/extensions/amp-iframe/1.0/component.type.js
+++ b/extensions/amp-iframe/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-iframe/1.0/storybook/Basic.amp.js b/extensions/amp-iframe/1.0/storybook/Basic.amp.js
index 994e96aa0e55..87a30ca1a428 100644
--- a/extensions/amp-iframe/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-iframe/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {withAmp} from '@ampproject/storybook-addon';
 import {withKnobs} from '@storybook/addon-knobs';
diff --git a/extensions/amp-iframe/1.0/storybook/Basic.js b/extensions/amp-iframe/1.0/storybook/Basic.js
index b0ff5feed2bb..0aba6a736c7a 100644
--- a/extensions/amp-iframe/1.0/storybook/Basic.js
+++ b/extensions/amp-iframe/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {Iframe} from '../component';
 import {withKnobs} from '@storybook/addon-knobs';
diff --git a/extensions/amp-iframe/1.0/test/test-amp-iframe.js b/extensions/amp-iframe/1.0/test/test-amp-iframe.js
index b6e6980b9c50..f1296749e1a3 100644
--- a/extensions/amp-iframe/1.0/test/test-amp-iframe.js
+++ b/extensions/amp-iframe/1.0/test/test-amp-iframe.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-iframe';
 import {htmlFor} from '#core/dom/static-template';
 import {toggleExperiment} from '#experiments';
diff --git a/extensions/amp-iframe/1.0/test/test-component.js b/extensions/amp-iframe/1.0/test/test-component.js
index cf35c4dcd32d..9e8fcd61af06 100644
--- a/extensions/amp-iframe/1.0/test/test-component.js
+++ b/extensions/amp-iframe/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {Iframe} from '../component';
 import {mount} from 'enzyme';
diff --git a/extensions/amp-iframe/amp-iframe.md b/extensions/amp-iframe/amp-iframe.md
index bb2ca9aeb5e3..f5eaeb8cac3b 100644
--- a/extensions/amp-iframe/amp-iframe.md
+++ b/extensions/amp-iframe/amp-iframe.md
@@ -8,22 +8,6 @@ experimental: true
 bento: true
 ---
 
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-iframe
 
 ## Usage
diff --git a/extensions/amp-iframely/0.1/amp-iframely.js b/extensions/amp-iframely/0.1/amp-iframely.js
index bb37759c20a0..9f62d3082398 100644
--- a/extensions/amp-iframely/0.1/amp-iframely.js
+++ b/extensions/amp-iframely/0.1/amp-iframely.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {createElementWithAttributes, removeElement} from '#core/dom';
 import {applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
 import {measureIntersection} from '#core/dom/layout/intersection';
diff --git a/extensions/amp-iframely/0.1/test/test-amp-iframely.js b/extensions/amp-iframely/0.1/test/test-amp-iframely.js
index 2d17e4e0f65a..94fadceffc7d 100644
--- a/extensions/amp-iframely/0.1/test/test-amp-iframely.js
+++ b/extensions/amp-iframely/0.1/test/test-amp-iframely.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-iframely';
 
 describes.realWin(
diff --git a/extensions/amp-ima-video/0.1/amp-ima-video.js b/extensions/amp-ima-video/0.1/amp-ima-video.js
index 6957c7aceb45..2722720a1d00 100644
--- a/extensions/amp-ima-video/0.1/amp-ima-video.js
+++ b/extensions/amp-ima-video/0.1/amp-ima-video.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ImaPlayerData} from '#ads/google/ima/ima-player-data';
 
 import {Deferred} from '#core/data-structures/promise';
diff --git a/extensions/amp-ima-video/0.1/ima-player-data.js b/extensions/amp-ima-video/0.1/ima-player-data.js
index 671dfd79eb64..f5ae651074ca 100644
--- a/extensions/amp-ima-video/0.1/ima-player-data.js
+++ b/extensions/amp-ima-video/0.1/ima-player-data.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 export class ImaPlayerData {
   /**
    * Create a new ImaPlayerData object.
diff --git a/extensions/amp-ima-video/0.1/test/test-amp-ima-video.js b/extensions/amp-ima-video/0.1/test/test-amp-ima-video.js
index 2f03babd9d97..90cf6dc9851a 100644
--- a/extensions/amp-ima-video/0.1/test/test-amp-ima-video.js
+++ b/extensions/amp-ima-video/0.1/test/test-amp-ima-video.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-ima-video';
 import {waitForChildPromise} from '#core/dom';
 import {htmlFor} from '#core/dom/static-template';
diff --git a/extensions/amp-ima-video/0.1/test/test-ima-video-internal.js b/extensions/amp-ima-video/0.1/test/test-ima-video-internal.js
index cb221faeb6f5..3578ab950834 100644
--- a/extensions/amp-ima-video/0.1/test/test-ima-video-internal.js
+++ b/extensions/amp-ima-video/0.1/test/test-ima-video-internal.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as imaVideoObj from '#ads/google/ima/ima-video';
 
 import {CONSENT_POLICY_STATE} from '#core/constants/consent-state';
diff --git a/extensions/amp-ima-video/amp-ima-video.md b/extensions/amp-ima-video/amp-ima-video.md
index 2293bff28818..99d71b3c8c2f 100644
--- a/extensions/amp-ima-video/amp-ima-video.md
+++ b/extensions/amp-ima-video/amp-ima-video.md
@@ -6,22 +6,6 @@ teaser:
   text: Embeds a video player for instream video ads that are integrated with the IMA SDK.
 ---
 
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-ima-video
 
 ## Usage
diff --git a/extensions/amp-ima-video/consent-blocking.md b/extensions/amp-ima-video/consent-blocking.md
index 9f80a7ccfc78..3df33e959dc5 100644
--- a/extensions/amp-ima-video/consent-blocking.md
+++ b/extensions/amp-ima-video/consent-blocking.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # User consent
 
 The `amp-ima-video` extension has built in compatibility with the
diff --git a/extensions/amp-image-lightbox/0.1/amp-image-lightbox.css b/extensions/amp-image-lightbox/0.1/amp-image-lightbox.css
index a7048633aab5..05103c961def 100644
--- a/extensions/amp-image-lightbox/0.1/amp-image-lightbox.css
+++ b/extensions/amp-image-lightbox/0.1/amp-image-lightbox.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 
 /* Non-overridable properties */
diff --git a/extensions/amp-image-lightbox/0.1/amp-image-lightbox.js b/extensions/amp-image-lightbox/0.1/amp-image-lightbox.js
index 6f36a9c5cf2e..a865fb7409a5 100644
--- a/extensions/amp-image-lightbox/0.1/amp-image-lightbox.js
+++ b/extensions/amp-image-lightbox/0.1/amp-image-lightbox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Keys} from '#core/constants/key-codes';
 import {bezierCurve} from '#core/data-structures/curve';
 import * as dom from '#core/dom';
diff --git a/extensions/amp-image-lightbox/0.1/test/integration/test-amp-image-lightbox.js b/extensions/amp-image-lightbox/0.1/test/integration/test-amp-image-lightbox.js
index ef7b47b105a9..b93303fa9369 100644
--- a/extensions/amp-image-lightbox/0.1/test/integration/test-amp-image-lightbox.js
+++ b/extensions/amp-image-lightbox/0.1/test/integration/test-amp-image-lightbox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {poll} from '#testing/iframe';
 
 describes.sandboxed
diff --git a/extensions/amp-image-lightbox/0.1/test/test-amp-image-lightbox.js b/extensions/amp-image-lightbox/0.1/test/test-amp-image-lightbox.js
index 352690941bbe..8387fb3ae114 100644
--- a/extensions/amp-image-lightbox/0.1/test/test-amp-image-lightbox.js
+++ b/extensions/amp-image-lightbox/0.1/test/test-amp-image-lightbox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-image-lightbox';
 import * as fakeTimers from '@sinonjs/fake-timers';
 
diff --git a/extensions/amp-image-lightbox/amp-image-lightbox.md b/extensions/amp-image-lightbox/amp-image-lightbox.md
index 54d2c568c46d..b17b22315402 100644
--- a/extensions/amp-image-lightbox/amp-image-lightbox.md
+++ b/extensions/amp-image-lightbox/amp-image-lightbox.md
@@ -7,22 +7,6 @@ teaser:
   text: Provides a lightbox effect for a specified image.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-image-lightbox
 
 ## Usage
diff --git a/extensions/amp-image-slider/0.1/amp-image-slider.css b/extensions/amp-image-slider/0.1/amp-image-slider.css
index 89efba747d3e..8d1ad4ecc47c 100644
--- a/extensions/amp-image-slider/0.1/amp-image-slider.css
+++ b/extensions/amp-image-slider/0.1/amp-image-slider.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .i-amphtml-image-slider-container {
   position: absolute !important;
diff --git a/extensions/amp-image-slider/0.1/amp-image-slider.js b/extensions/amp-image-slider/0.1/amp-image-slider.js
index 11a7a82078e7..8f5829ee1b9b 100644
--- a/extensions/amp-image-slider/0.1/amp-image-slider.js
+++ b/extensions/amp-image-slider/0.1/amp-image-slider.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {CommonSignals} from '#core/constants/common-signals';
 import {isLayoutSizeDefined} from '#core/dom/layout';
diff --git a/extensions/amp-image-slider/0.1/storybook/Basic.amp.js b/extensions/amp-image-slider/0.1/storybook/Basic.amp.js
index dab79bf1aefc..88e6692b6858 100644
--- a/extensions/amp-image-slider/0.1/storybook/Basic.amp.js
+++ b/extensions/amp-image-slider/0.1/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {text, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-image-slider/0.1/test/integration/test-amp-image-slider.js b/extensions/amp-image-slider/0.1/test/integration/test-amp-image-slider.js
index d1e80cee6fbf..ff066ae9a215 100644
--- a/extensions/amp-image-slider/0.1/test/integration/test-amp-image-slider.js
+++ b/extensions/amp-image-slider/0.1/test/integration/test-amp-image-slider.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createPointerEvent} from '#testing/test-helper';
 
 const t = describes.sandboxed.configure().ifChrome();
diff --git a/extensions/amp-image-slider/0.1/test/test-amp-image-slider.js b/extensions/amp-image-slider/0.1/test/test-amp-image-slider.js
index 91dfd44b2c89..941f5e31ef97 100644
--- a/extensions/amp-image-slider/0.1/test/test-amp-image-slider.js
+++ b/extensions/amp-image-slider/0.1/test/test-amp-image-slider.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.realWin(
   'amp-image-slider component',
   {
diff --git a/extensions/amp-image-viewer/0.1/amp-image-viewer.css b/extensions/amp-image-viewer/0.1/amp-image-viewer.css
index c38f50b6f56c..b026246070c6 100644
--- a/extensions/amp-image-viewer/0.1/amp-image-viewer.css
+++ b/extensions/amp-image-viewer/0.1/amp-image-viewer.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
  .i-amphtml-image-viewer-image {
   position: absolute;
diff --git a/extensions/amp-image-viewer/0.1/amp-image-viewer.js b/extensions/amp-image-viewer/0.1/amp-image-viewer.js
index f0084244a847..18c204972c58 100644
--- a/extensions/amp-image-viewer/0.1/amp-image-viewer.js
+++ b/extensions/amp-image-viewer/0.1/amp-image-viewer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CommonSignals} from '#core/constants/common-signals';
 import {bezierCurve} from '#core/data-structures/curve';
 import {Layout} from '#core/dom/layout';
diff --git a/extensions/amp-imgur/0.1/amp-imgur.js b/extensions/amp-imgur/0.1/amp-imgur.js
index 2d66baa8c6ac..0b182484664e 100644
--- a/extensions/amp-imgur/0.1/amp-imgur.js
+++ b/extensions/amp-imgur/0.1/amp-imgur.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Embeds a imgur
  * Example:
diff --git a/extensions/amp-imgur/0.1/test/test-amp-imgur.js b/extensions/amp-imgur/0.1/test/test-amp-imgur.js
index c7a23d269d00..634abfd24a8a 100644
--- a/extensions/amp-imgur/0.1/test/test-amp-imgur.js
+++ b/extensions/amp-imgur/0.1/test/test-amp-imgur.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-imgur';
 import {createElementWithAttributes, waitForChildPromise} from '#core/dom';
 
diff --git a/extensions/amp-inline-gallery/0.1/amp-inline-gallery-captions.css b/extensions/amp-inline-gallery/0.1/amp-inline-gallery-captions.css
index f10886e722e7..d35a05f64aa2 100644
--- a/extensions/amp-inline-gallery/0.1/amp-inline-gallery-captions.css
+++ b/extensions/amp-inline-gallery/0.1/amp-inline-gallery-captions.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-inline-gallery-captions {
   pointer-events: none;
diff --git a/extensions/amp-inline-gallery/0.1/amp-inline-gallery-captions.js b/extensions/amp-inline-gallery/0.1/amp-inline-gallery-captions.js
index 5e662ac47991..f237e74ddf58 100644
--- a/extensions/amp-inline-gallery/0.1/amp-inline-gallery-captions.js
+++ b/extensions/amp-inline-gallery/0.1/amp-inline-gallery-captions.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {closestAncestorElementBySelector} from '#core/dom/query';
 import {exponentialFalloff} from './amp-inline-gallery-pagination';
 import {isExperimentOn} from '#experiments';
diff --git a/extensions/amp-inline-gallery/0.1/amp-inline-gallery-pagination.css b/extensions/amp-inline-gallery/0.1/amp-inline-gallery-pagination.css
index f9a2297efe2e..e43bc7793059 100644
--- a/extensions/amp-inline-gallery/0.1/amp-inline-gallery-pagination.css
+++ b/extensions/amp-inline-gallery/0.1/amp-inline-gallery-pagination.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-inline-gallery-pagination {
   font-size: 12px;
diff --git a/extensions/amp-inline-gallery/0.1/amp-inline-gallery-pagination.js b/extensions/amp-inline-gallery/0.1/amp-inline-gallery-pagination.js
index 3952e2d8dae4..9760a858aa18 100644
--- a/extensions/amp-inline-gallery/0.1/amp-inline-gallery-pagination.js
+++ b/extensions/amp-inline-gallery/0.1/amp-inline-gallery-pagination.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {InlineGalleryEvents} from './inline-gallery-events';
 import {Layout} from '#core/dom/layout';
 import {createCustomEvent} from '../../../src/event-helper';
diff --git a/extensions/amp-inline-gallery/0.1/amp-inline-gallery-slide.css b/extensions/amp-inline-gallery/0.1/amp-inline-gallery-slide.css
index 651074201c88..17fe1655e28a 100644
--- a/extensions/amp-inline-gallery/0.1/amp-inline-gallery-slide.css
+++ b/extensions/amp-inline-gallery/0.1/amp-inline-gallery-slide.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-inline-gallery-slide {
   /*
diff --git a/extensions/amp-inline-gallery/0.1/amp-inline-gallery-slide.js b/extensions/amp-inline-gallery/0.1/amp-inline-gallery-slide.js
index d556abb43334..c50b2a835e6d 100644
--- a/extensions/amp-inline-gallery/0.1/amp-inline-gallery-slide.js
+++ b/extensions/amp-inline-gallery/0.1/amp-inline-gallery-slide.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Layout} from '#core/dom/layout';
 import {Services} from '#service';
 import {htmlFor} from '#core/dom/static-template';
diff --git a/extensions/amp-inline-gallery/0.1/amp-inline-gallery-thumbnails.css b/extensions/amp-inline-gallery/0.1/amp-inline-gallery-thumbnails.css
index 8f4d0ce3fbe9..127fe83e75d7 100644
--- a/extensions/amp-inline-gallery/0.1/amp-inline-gallery-thumbnails.css
+++ b/extensions/amp-inline-gallery/0.1/amp-inline-gallery-thumbnails.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-inline-gallery-thumbnails .i-amphtml-carousel-content {
   padding: 0;
diff --git a/extensions/amp-inline-gallery/0.1/amp-inline-gallery-thumbnails.js b/extensions/amp-inline-gallery/0.1/amp-inline-gallery-thumbnails.js
index 0ff8b15045a1..4734f8d74ae9 100644
--- a/extensions/amp-inline-gallery/0.1/amp-inline-gallery-thumbnails.js
+++ b/extensions/amp-inline-gallery/0.1/amp-inline-gallery-thumbnails.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CarouselEvents} from '../../amp-base-carousel/0.1/carousel-events';
 import {InlineGalleryEvents} from './inline-gallery-events';
 import {createCustomEvent} from '../../../src/event-helper';
diff --git a/extensions/amp-inline-gallery/0.1/amp-inline-gallery.css b/extensions/amp-inline-gallery/0.1/amp-inline-gallery.css
index 0f1d7bace89f..da7f09aa434d 100644
--- a/extensions/amp-inline-gallery/0.1/amp-inline-gallery.css
+++ b/extensions/amp-inline-gallery/0.1/amp-inline-gallery.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-inline-gallery {
   --i-amphtml-caption-height: 0px;
diff --git a/extensions/amp-inline-gallery/0.1/amp-inline-gallery.js b/extensions/amp-inline-gallery/0.1/amp-inline-gallery.js
index 9d57bca4a537..c4e253df60ee 100644
--- a/extensions/amp-inline-gallery/0.1/amp-inline-gallery.js
+++ b/extensions/amp-inline-gallery/0.1/amp-inline-gallery.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CSS as AmpInlineGalleryCSS} from '../../../build/amp-inline-gallery-0.1.css';
 import {AmpInlineGalleryCaptions} from './amp-inline-gallery-captions';
 import {CSS as AmpInlineGalleryCaptionsCSS} from '../../../build/amp-inline-gallery-captions-0.1.css';
diff --git a/extensions/amp-inline-gallery/0.1/amp-inline-gallery.md b/extensions/amp-inline-gallery/0.1/amp-inline-gallery.md
index 7f289cdd392d..35494f90cbaf 100644
--- a/extensions/amp-inline-gallery/0.1/amp-inline-gallery.md
+++ b/extensions/amp-inline-gallery/0.1/amp-inline-gallery.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays multiple similar pieces of content along a horizontal axis, with optional pagination dots and thumbnails.
 ---
 
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-inline-gallery
 
 ## Usage
diff --git a/extensions/amp-inline-gallery/0.1/inline-gallery-events.js b/extensions/amp-inline-gallery/0.1/inline-gallery-events.js
index 9caa8fd03248..17abc80d396f 100644
--- a/extensions/amp-inline-gallery/0.1/inline-gallery-events.js
+++ b/extensions/amp-inline-gallery/0.1/inline-gallery-events.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @enum {string}
  */
diff --git a/extensions/amp-inline-gallery/1.0/amp-inline-gallery-pagination.css b/extensions/amp-inline-gallery/1.0/amp-inline-gallery-pagination.css
index 27426ed03ad3..fd2901d6a7f7 100644
--- a/extensions/amp-inline-gallery/1.0/amp-inline-gallery-pagination.css
+++ b/extensions/amp-inline-gallery/1.0/amp-inline-gallery-pagination.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-inline-gallery-pagination[inset] {
   display: block !important;
diff --git a/extensions/amp-inline-gallery/1.0/amp-inline-gallery-pagination.js b/extensions/amp-inline-gallery/1.0/amp-inline-gallery-pagination.js
index 40c4511bf914..a6bdf6ac1094 100644
--- a/extensions/amp-inline-gallery/1.0/amp-inline-gallery-pagination.js
+++ b/extensions/amp-inline-gallery/1.0/amp-inline-gallery-pagination.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CSS} from './pagination.jss';
 import {CarouselContextProp} from '../../amp-base-carousel/1.0/carousel-props';
 import {Pagination} from './pagination';
diff --git a/extensions/amp-inline-gallery/1.0/amp-inline-gallery-thumbnails.js b/extensions/amp-inline-gallery/1.0/amp-inline-gallery-thumbnails.js
index 5cdffa7a592c..761b3ee6d3ab 100644
--- a/extensions/amp-inline-gallery/1.0/amp-inline-gallery-thumbnails.js
+++ b/extensions/amp-inline-gallery/1.0/amp-inline-gallery-thumbnails.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CSS as CAROUSEL_CSS} from '../../amp-base-carousel/1.0/component.jss';
 import {CarouselContextProp} from '../../amp-base-carousel/1.0/carousel-props';
 import {PreactBaseElement} from '#preact/base-element';
diff --git a/extensions/amp-inline-gallery/1.0/amp-inline-gallery.css b/extensions/amp-inline-gallery/1.0/amp-inline-gallery.css
index 0b053059182b..8209d1246ff5 100644
--- a/extensions/amp-inline-gallery/1.0/amp-inline-gallery.css
+++ b/extensions/amp-inline-gallery/1.0/amp-inline-gallery.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /* Pre-upgrade: display:block element */
 amp-inline-gallery,
diff --git a/extensions/amp-inline-gallery/1.0/amp-inline-gallery.js b/extensions/amp-inline-gallery/1.0/amp-inline-gallery.js
index aaa8634a23c8..18be9efed548 100644
--- a/extensions/amp-inline-gallery/1.0/amp-inline-gallery.js
+++ b/extensions/amp-inline-gallery/1.0/amp-inline-gallery.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   AmpInlineGalleryPagination,
   TAG as PAGINATION_TAG,
diff --git a/extensions/amp-inline-gallery/1.0/base-element.js b/extensions/amp-inline-gallery/1.0/base-element.js
index d33380706103..65eb7122e6f9 100644
--- a/extensions/amp-inline-gallery/1.0/base-element.js
+++ b/extensions/amp-inline-gallery/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {CarouselContextProp} from '../../amp-base-carousel/1.0/carousel-props';
 import {InlineGallery} from './component';
diff --git a/extensions/amp-inline-gallery/1.0/component.js b/extensions/amp-inline-gallery/1.0/component.js
index 329190164cf6..6b0722228a77 100644
--- a/extensions/amp-inline-gallery/1.0/component.js
+++ b/extensions/amp-inline-gallery/1.0/component.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import * as Preact from '#preact';
 import {CarouselContext} from '../../amp-base-carousel/1.0/carousel-context';
 import {ContainWrapper} from '#preact/component';
diff --git a/extensions/amp-inline-gallery/1.0/component.type.js b/extensions/amp-inline-gallery/1.0/component.type.js
index 913452001770..b529c0f7caa5 100644
--- a/extensions/amp-inline-gallery/1.0/component.type.js
+++ b/extensions/amp-inline-gallery/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-inline-gallery/1.0/pagination.js b/extensions/amp-inline-gallery/1.0/pagination.js
index b3bd802556cb..5c9dbb664e2e 100644
--- a/extensions/amp-inline-gallery/1.0/pagination.js
+++ b/extensions/amp-inline-gallery/1.0/pagination.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {CarouselContext} from '../../amp-base-carousel/1.0/carousel-context';
 import {Wrapper} from '#preact/component';
diff --git a/extensions/amp-inline-gallery/1.0/pagination.jss.js b/extensions/amp-inline-gallery/1.0/pagination.jss.js
index e5067f86a083..7fbbd2c2df94 100644
--- a/extensions/amp-inline-gallery/1.0/pagination.jss.js
+++ b/extensions/amp-inline-gallery/1.0/pagination.jss.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createUseStyles} from 'react-jss';
 
 const inset = {};
diff --git a/extensions/amp-inline-gallery/1.0/storybook/Basic.amp.js b/extensions/amp-inline-gallery/1.0/storybook/Basic.amp.js
index d07a81df8bea..eb32f47b0bb3 100644
--- a/extensions/amp-inline-gallery/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-inline-gallery/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {boolean, select, text, withKnobs} from '@storybook/addon-knobs';
 import {withAmp} from '@ampproject/storybook-addon';
diff --git a/extensions/amp-inline-gallery/1.0/storybook/Basic.js b/extensions/amp-inline-gallery/1.0/storybook/Basic.js
index cd18277c2504..8eabb0d5be09 100644
--- a/extensions/amp-inline-gallery/1.0/storybook/Basic.js
+++ b/extensions/amp-inline-gallery/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {BaseCarousel} from '../../../amp-base-carousel/1.0/component';
 import {InlineGallery} from '../component';
diff --git a/extensions/amp-inline-gallery/1.0/test/test-amp-inline-gallery.js b/extensions/amp-inline-gallery/1.0/test/test-amp-inline-gallery.js
index e78d70424372..1fa7d83472ad 100644
--- a/extensions/amp-inline-gallery/1.0/test/test-amp-inline-gallery.js
+++ b/extensions/amp-inline-gallery/1.0/test/test-amp-inline-gallery.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import '../../../amp-base-carousel/1.0/amp-base-carousel';
 import '../amp-inline-gallery';
 import {ActionInvocation} from '#service/action-impl';
diff --git a/extensions/amp-inline-gallery/1.0/test/test-component.js b/extensions/amp-inline-gallery/1.0/test/test-component.js
index 9b40b32f3a0b..3d7b67119368 100644
--- a/extensions/amp-inline-gallery/1.0/test/test-component.js
+++ b/extensions/amp-inline-gallery/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {BaseCarousel} from '../../../amp-base-carousel/1.0/component';
 import {InlineGallery} from '../component';
diff --git a/extensions/amp-inline-gallery/1.0/thumbnails.js b/extensions/amp-inline-gallery/1.0/thumbnails.js
index 602d8741493a..9c6b50843ab8 100644
--- a/extensions/amp-inline-gallery/1.0/thumbnails.js
+++ b/extensions/amp-inline-gallery/1.0/thumbnails.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {BaseCarousel} from '../../amp-base-carousel/1.0/component';
 import {CarouselContext} from '../../amp-base-carousel/1.0/carousel-context';
diff --git a/extensions/amp-inline-gallery/1.0/thumbnails.jss.js b/extensions/amp-inline-gallery/1.0/thumbnails.jss.js
index 44247bca61c6..96355e6dba83 100644
--- a/extensions/amp-inline-gallery/1.0/thumbnails.jss.js
+++ b/extensions/amp-inline-gallery/1.0/thumbnails.jss.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createUseStyles} from 'react-jss';
 
 // Default height. Can be overridden by user style.
diff --git a/extensions/amp-inline-gallery/amp-inline-gallery.md b/extensions/amp-inline-gallery/amp-inline-gallery.md
index a2781bfff862..227a6276ae73 100644
--- a/extensions/amp-inline-gallery/amp-inline-gallery.md
+++ b/extensions/amp-inline-gallery/amp-inline-gallery.md
@@ -8,22 +8,6 @@ experimental: true
 bento: true
 ---
 
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-inline-gallery
 
 ## Usage
diff --git a/extensions/amp-inputmask/0.1/amp-inputmask.js b/extensions/amp-inputmask/0.1/amp-inputmask.js
index 85a757780df2..1abc0cbb83a9 100644
--- a/extensions/amp-inputmask/0.1/amp-inputmask.js
+++ b/extensions/amp-inputmask/0.1/amp-inputmask.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 import {iterateCursor} from '#core/dom';
 
diff --git a/extensions/amp-inputmask/0.1/constants.js b/extensions/amp-inputmask/0.1/constants.js
index 43d42a33c54c..cb5692763257 100644
--- a/extensions/amp-inputmask/0.1/constants.js
+++ b/extensions/amp-inputmask/0.1/constants.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 export const MaskChars = {
   ALPHANUMERIC_REQUIRED: 'A',
   ALPHANUMERIC_OPTIONAL: 'a',
diff --git a/extensions/amp-inputmask/0.1/inputmask-custom-alias.js b/extensions/amp-inputmask/0.1/inputmask-custom-alias.js
index fcf49dd1f5c9..15df6561cf55 100644
--- a/extensions/amp-inputmask/0.1/inputmask-custom-alias.js
+++ b/extensions/amp-inputmask/0.1/inputmask-custom-alias.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {user} from '../../../src/log';
diff --git a/extensions/amp-inputmask/0.1/inputmask-payment-card-alias.js b/extensions/amp-inputmask/0.1/inputmask-payment-card-alias.js
index 90a756102b0f..933828fad29b 100644
--- a/extensions/amp-inputmask/0.1/inputmask-payment-card-alias.js
+++ b/extensions/amp-inputmask/0.1/inputmask-payment-card-alias.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 /**
diff --git a/extensions/amp-inputmask/0.1/mask-impl.js b/extensions/amp-inputmask/0.1/mask-impl.js
index d281cec639f7..1da6d9ecb640 100644
--- a/extensions/amp-inputmask/0.1/mask-impl.js
+++ b/extensions/amp-inputmask/0.1/mask-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 import {dict} from '#core/types/object';
 
diff --git a/extensions/amp-inputmask/0.1/mask-interface.js b/extensions/amp-inputmask/0.1/mask-interface.js
index 2b9383817ffc..46df83d13700 100644
--- a/extensions/amp-inputmask/0.1/mask-interface.js
+++ b/extensions/amp-inputmask/0.1/mask-interface.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Describes the contract for an inputmask UX controller.
  * @interface
diff --git a/extensions/amp-inputmask/0.1/test/integration/test-integration-amp-inputmask-date.js b/extensions/amp-inputmask/0.1/test/integration/test-integration-amp-inputmask-date.js
index 591f1fecccae..9857545737f4 100644
--- a/extensions/amp-inputmask/0.1/test/integration/test-integration-amp-inputmask-date.js
+++ b/extensions/amp-inputmask/0.1/test/integration/test-integration-amp-inputmask-date.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {simulateKeyboardInteraction} from './utils';
 
 const config = describes.sandboxed.configure().ifChrome();
diff --git a/extensions/amp-inputmask/0.1/test/integration/test-integration-amp-inputmask.js b/extensions/amp-inputmask/0.1/test/integration/test-integration-amp-inputmask.js
index ae63ca64aad2..e5c463ca8906 100644
--- a/extensions/amp-inputmask/0.1/test/integration/test-integration-amp-inputmask.js
+++ b/extensions/amp-inputmask/0.1/test/integration/test-integration-amp-inputmask.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {poll} from '#testing/iframe';
 
 import {simulateKeyboardInteraction} from './utils';
diff --git a/extensions/amp-inputmask/0.1/test/integration/utils.js b/extensions/amp-inputmask/0.1/test/integration/utils.js
index de5dd59ebaab..7a89352d524a 100644
--- a/extensions/amp-inputmask/0.1/test/integration/utils.js
+++ b/extensions/amp-inputmask/0.1/test/integration/utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {listenOncePromise} from '../../../../../src/event-helper';
 
 export function simulateKeyboardInteraction(win, input, key) {
diff --git a/extensions/amp-inputmask/0.1/test/test-inputmask-custom-alias.js b/extensions/amp-inputmask/0.1/test/test-inputmask-custom-alias.js
index 03bbf5c23ab2..d74a8239a9fd 100644
--- a/extensions/amp-inputmask/0.1/test/test-inputmask-custom-alias.js
+++ b/extensions/amp-inputmask/0.1/test/test-inputmask-custom-alias.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   getAliasDefinition,
   getMaskPrefix,
diff --git a/extensions/amp-inputmask/0.1/test/test-mask-impl.js b/extensions/amp-inputmask/0.1/test/test-mask-impl.js
index 35f6794504ed..1204bab09e79 100644
--- a/extensions/amp-inputmask/0.1/test/test-mask-impl.js
+++ b/extensions/amp-inputmask/0.1/test/test-mask-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Mask} from '../mask-impl';
 
 describes.sandboxed('amp-inputmask mask-impl', {}, (env) => {
diff --git a/extensions/amp-inputmask/0.1/text-mask.js b/extensions/amp-inputmask/0.1/text-mask.js
index fb2df0a71326..a383c85af28f 100644
--- a/extensions/amp-inputmask/0.1/text-mask.js
+++ b/extensions/amp-inputmask/0.1/text-mask.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {iterateCursor, removeElement} from '#core/dom';
 
 import {Services} from '#service';
diff --git a/extensions/amp-instagram/0.1/amp-instagram.css b/extensions/amp-instagram/0.1/amp-instagram.css
index b33297b1bf32..afabf6080253 100644
--- a/extensions/amp-instagram/0.1/amp-instagram.css
+++ b/extensions/amp-instagram/0.1/amp-instagram.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /* Non-overridable properties */
 
diff --git a/extensions/amp-instagram/0.1/amp-instagram.js b/extensions/amp-instagram/0.1/amp-instagram.js
index aaaa7bb4e1df..38643963c20c 100644
--- a/extensions/amp-instagram/0.1/amp-instagram.js
+++ b/extensions/amp-instagram/0.1/amp-instagram.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Embeds an instagram photo. The data-shortcode attribute can be
  * easily copied from a normal instagram URL. Example: <code> <amp-instagram
diff --git a/extensions/amp-instagram/0.1/amp-instagram.md b/extensions/amp-instagram/0.1/amp-instagram.md
index f81b4785b0e4..1983f4c11563 100644
--- a/extensions/amp-instagram/0.1/amp-instagram.md
+++ b/extensions/amp-instagram/0.1/amp-instagram.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays an Instagram embed.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-instagram
 
 ## Behavior
diff --git a/extensions/amp-instagram/0.1/storybook/Basic.amp.js b/extensions/amp-instagram/0.1/storybook/Basic.amp.js
index 5f2f41d476b5..3e8473b993c6 100644
--- a/extensions/amp-instagram/0.1/storybook/Basic.amp.js
+++ b/extensions/amp-instagram/0.1/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {boolean, number, text, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-instagram/0.1/test/test-amp-instagram.js b/extensions/amp-instagram/0.1/test/test-amp-instagram.js
index aa8d15138f8c..63dcf9c9287e 100644
--- a/extensions/amp-instagram/0.1/test/test-amp-instagram.js
+++ b/extensions/amp-instagram/0.1/test/test-amp-instagram.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpInstagram} from '../amp-instagram';
 
 describes.realWin(
diff --git a/extensions/amp-instagram/1.0/amp-instagram.css b/extensions/amp-instagram/1.0/amp-instagram.css
index e9df86380826..d3917cb5f982 100644
--- a/extensions/amp-instagram/1.0/amp-instagram.css
+++ b/extensions/amp-instagram/1.0/amp-instagram.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * Pre-upgrade:
diff --git a/extensions/amp-instagram/1.0/amp-instagram.js b/extensions/amp-instagram/1.0/amp-instagram.js
index 5efc36f5e92e..f08bbfe35151 100644
--- a/extensions/amp-instagram/1.0/amp-instagram.js
+++ b/extensions/amp-instagram/1.0/amp-instagram.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {isExperimentOn} from '#experiments';
diff --git a/extensions/amp-instagram/1.0/base-element.js b/extensions/amp-instagram/1.0/base-element.js
index 8ae178f97853..b43780f17ff6 100644
--- a/extensions/amp-instagram/1.0/base-element.js
+++ b/extensions/amp-instagram/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {PreactBaseElement} from '#preact/base-element';
 
 import {Instagram} from './component';
diff --git a/extensions/amp-instagram/1.0/component.js b/extensions/amp-instagram/1.0/component.js
index ab855bf6602e..325bec857937 100644
--- a/extensions/amp-instagram/1.0/component.js
+++ b/extensions/amp-instagram/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 import {parseJson} from '#core/types/object/json';
 
diff --git a/extensions/amp-instagram/1.0/component.type.js b/extensions/amp-instagram/1.0/component.type.js
index e702c8ce39df..ea2efc25177c 100644
--- a/extensions/amp-instagram/1.0/component.type.js
+++ b/extensions/amp-instagram/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-instagram/1.0/storybook/Basic.amp.js b/extensions/amp-instagram/1.0/storybook/Basic.amp.js
index c417b14a7a41..44bc5c1d5fb7 100644
--- a/extensions/amp-instagram/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-instagram/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {boolean, number, text, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-instagram/1.0/storybook/Basic.js b/extensions/amp-instagram/1.0/storybook/Basic.js
index 63da9d5be1d8..fb83190b26ad 100644
--- a/extensions/amp-instagram/1.0/storybook/Basic.js
+++ b/extensions/amp-instagram/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {boolean, number, text, withKnobs} from '@storybook/addon-knobs';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-instagram/1.0/test/test-amp-instagram.js b/extensions/amp-instagram/1.0/test/test-amp-instagram.js
index f995495235b6..a34c8d1c3527 100644
--- a/extensions/amp-instagram/1.0/test/test-amp-instagram.js
+++ b/extensions/amp-instagram/1.0/test/test-amp-instagram.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-instagram';
 import {createElementWithAttributes} from '#core/dom';
 
diff --git a/extensions/amp-instagram/1.0/test/test-component.js b/extensions/amp-instagram/1.0/test/test-component.js
index 3fa0c1e9fe70..8387e724c961 100644
--- a/extensions/amp-instagram/1.0/test/test-component.js
+++ b/extensions/amp-instagram/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {mount} from 'enzyme';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-instagram/amp-instagram.md b/extensions/amp-instagram/amp-instagram.md
index efbb4d8ce7e0..c3c6524ad920 100644
--- a/extensions/amp-instagram/amp-instagram.md
+++ b/extensions/amp-instagram/amp-instagram.md
@@ -8,22 +8,6 @@ experimental: true
 bento: true
 ---
 
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-instagram
 
 ## Behavior
diff --git a/extensions/amp-install-serviceworker/0.1/amp-install-serviceworker.js b/extensions/amp-install-serviceworker/0.1/amp-install-serviceworker.js
index bc9762aaf38e..c4fbefa370d6 100644
--- a/extensions/amp-install-serviceworker/0.1/amp-install-serviceworker.js
+++ b/extensions/amp-install-serviceworker/0.1/amp-install-serviceworker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeElement} from '#core/dom';
 import {closestAncestorElementBySelector} from '#core/dom/query';
 import {toggle} from '#core/dom/style';
diff --git a/extensions/amp-install-serviceworker/0.1/test/test-amp-install-serviceworker.js b/extensions/amp-install-serviceworker/0.1/test/test-amp-install-serviceworker.js
index 2f99634116b0..8f9083749a1a 100644
--- a/extensions/amp-install-serviceworker/0.1/test/test-amp-install-serviceworker.js
+++ b/extensions/amp-install-serviceworker/0.1/test/test-amp-install-serviceworker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {loadPromise} from '../../../../src/event-helper';
diff --git a/extensions/amp-install-serviceworker/amp-install-serviceworker.md b/extensions/amp-install-serviceworker/amp-install-serviceworker.md
index 2c13427812cb..9e83a5c49a14 100644
--- a/extensions/amp-install-serviceworker/amp-install-serviceworker.md
+++ b/extensions/amp-install-serviceworker/amp-install-serviceworker.md
@@ -7,22 +7,6 @@ teaser:
   text: Installs a ServiceWorker for the current page.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-install-serviceworker
 
 ## Usage
diff --git a/extensions/amp-intersection-observer-polyfill/0.1/amp-intersection-observer-polyfill.js b/extensions/amp-intersection-observer-polyfill/0.1/amp-intersection-observer-polyfill.js
index 911584c3c7c4..1cf294515245 100644
--- a/extensions/amp-intersection-observer-polyfill/0.1/amp-intersection-observer-polyfill.js
+++ b/extensions/amp-intersection-observer-polyfill/0.1/amp-intersection-observer-polyfill.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {installIntersectionObserver} from 'intersection-observer/intersection-observer.install';
 
 import {upgradePolyfill} from '#polyfills/stubs/intersection-observer-stub';
diff --git a/extensions/amp-intersection-observer-polyfill/0.1/cross-origin-observer.js b/extensions/amp-intersection-observer-polyfill/0.1/cross-origin-observer.js
index f4023cfe1e30..05b6a71028e2 100644
--- a/extensions/amp-intersection-observer-polyfill/0.1/cross-origin-observer.js
+++ b/extensions/amp-intersection-observer-polyfill/0.1/cross-origin-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {MessageType} from '#core/3p-frame-messaging';
 import {layoutRectLtwh} from '#core/dom/layout/rect';
 import {WindowInterface} from '#core/window/interface';
diff --git a/extensions/amp-intersection-observer-polyfill/0.1/test/test-cross-origin-observer.js b/extensions/amp-intersection-observer-polyfill/0.1/test/test-cross-origin-observer.js
index a95a572d8547..b35687db7247 100644
--- a/extensions/amp-intersection-observer-polyfill/0.1/test/test-cross-origin-observer.js
+++ b/extensions/amp-intersection-observer-polyfill/0.1/test/test-cross-origin-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {MessageType} from '#core/3p-frame-messaging';
 import {layoutRectLtwh} from '#core/dom/layout/rect';
 import {WindowInterface} from '#core/window/interface';
diff --git a/extensions/amp-izlesene/0.1/amp-izlesene.js b/extensions/amp-izlesene/0.1/amp-izlesene.js
index 53c7be76b7e9..bf3b0461bc11 100644
--- a/extensions/amp-izlesene/0.1/amp-izlesene.js
+++ b/extensions/amp-izlesene/0.1/amp-izlesene.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getDataParamsFromAttributes} from '#core/dom';
 import {applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
 import {PauseHelper} from '#core/dom/video/pause-helper';
diff --git a/extensions/amp-izlesene/0.1/test/test-amp-izlesene.js b/extensions/amp-izlesene/0.1/test/test-amp-izlesene.js
index ecd78ef89913..8804d98a1e2d 100644
--- a/extensions/amp-izlesene/0.1/test/test-amp-izlesene.js
+++ b/extensions/amp-izlesene/0.1/test/test-amp-izlesene.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-izlesene';
 
 describes.realWin(
diff --git a/extensions/amp-izlesene/amp-izlesene.md b/extensions/amp-izlesene/amp-izlesene.md
index caad50c7be89..3f21fef03e09 100644
--- a/extensions/amp-izlesene/amp-izlesene.md
+++ b/extensions/amp-izlesene/amp-izlesene.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays an Izlesene video.
 ---
 
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-izlesene
 
 ## Example
diff --git a/extensions/amp-jwplayer/0.1/amp-jwplayer.js b/extensions/amp-jwplayer/0.1/amp-jwplayer.js
index 4c4217e9a0ae..768176f29b94 100644
--- a/extensions/amp-jwplayer/0.1/amp-jwplayer.js
+++ b/extensions/amp-jwplayer/0.1/amp-jwplayer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {dispatchCustomEvent, removeElement} from '#core/dom';
 import {
diff --git a/extensions/amp-jwplayer/0.1/test/test-amp-jwplayer.js b/extensions/amp-jwplayer/0.1/test/test-amp-jwplayer.js
index a987c981acb7..59aa9c7f1e07 100644
--- a/extensions/amp-jwplayer/0.1/test/test-amp-jwplayer.js
+++ b/extensions/amp-jwplayer/0.1/test/test-amp-jwplayer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-jwplayer';
 import * as fullscreen from '#core/dom/fullscreen';
 import {htmlFor} from '#core/dom/static-template';
diff --git a/extensions/amp-jwplayer/amp-jwplayer.md b/extensions/amp-jwplayer/amp-jwplayer.md
index 0ff57e9632ac..f6b6478eead6 100644
--- a/extensions/amp-jwplayer/amp-jwplayer.md
+++ b/extensions/amp-jwplayer/amp-jwplayer.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays a cloud-hosted JW Player.
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-jwplayer
 
 ## Example
diff --git a/extensions/amp-kaltura-player/0.1/amp-kaltura-player.js b/extensions/amp-kaltura-player/0.1/amp-kaltura-player.js
index 10dc23cc3320..b920a9454e24 100644
--- a/extensions/amp-kaltura-player/0.1/amp-kaltura-player.js
+++ b/extensions/amp-kaltura-player/0.1/amp-kaltura-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getDataParamsFromAttributes} from '#core/dom';
 import {applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
 import {propagateAttributes} from '#core/dom/propagate-attributes';
diff --git a/extensions/amp-kaltura-player/0.1/test/test-amp-kaltura-player.js b/extensions/amp-kaltura-player/0.1/test/test-amp-kaltura-player.js
index 4a4ced323bd7..e1a14d949a25 100644
--- a/extensions/amp-kaltura-player/0.1/test/test-amp-kaltura-player.js
+++ b/extensions/amp-kaltura-player/0.1/test/test-amp-kaltura-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-kaltura-player';
 
 describes.realWin(
diff --git a/extensions/amp-lightbox-gallery/0.1/amp-lightbox-gallery.css b/extensions/amp-lightbox-gallery/0.1/amp-lightbox-gallery.css
index 027f17abdad4..dc7b8880d88e 100644
--- a/extensions/amp-lightbox-gallery/0.1/amp-lightbox-gallery.css
+++ b/extensions/amp-lightbox-gallery/0.1/amp-lightbox-gallery.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import './lightbox-caption.css';
 @import './lightbox-controls.css';
diff --git a/extensions/amp-lightbox-gallery/0.1/amp-lightbox-gallery.js b/extensions/amp-lightbox-gallery/0.1/amp-lightbox-gallery.js
index da32c009e0b6..2d7f674aa07a 100644
--- a/extensions/amp-lightbox-gallery/0.1/amp-lightbox-gallery.js
+++ b/extensions/amp-lightbox-gallery/0.1/amp-lightbox-gallery.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {prepareImageAnimation} from '@ampproject/animations';
 
 import {CommonSignals} from '#core/constants/common-signals';
diff --git a/extensions/amp-lightbox-gallery/0.1/events.js b/extensions/amp-lightbox-gallery/0.1/events.js
index c0bf3d78c642..8c8c720bb7d4 100644
--- a/extensions/amp-lightbox-gallery/0.1/events.js
+++ b/extensions/amp-lightbox-gallery/0.1/events.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @const @enum {string} */
 export const LightboxGalleryEvents = {
   // Triggered when the lightbox attribute is newly set on an item in order to
diff --git a/extensions/amp-lightbox-gallery/0.1/lightbox-caption.css b/extensions/amp-lightbox-gallery/0.1/lightbox-caption.css
index e05eec3b4e00..cbe87a459393 100644
--- a/extensions/amp-lightbox-gallery/0.1/lightbox-caption.css
+++ b/extensions/amp-lightbox-gallery/0.1/lightbox-caption.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .i-amphtml-lbg-caption-scroll {
   position: absolute !important;
diff --git a/extensions/amp-lightbox-gallery/0.1/lightbox-caption.js b/extensions/amp-lightbox-gallery/0.1/lightbox-caption.js
index f7f215e72830..09175b315a08 100644
--- a/extensions/amp-lightbox-gallery/0.1/lightbox-caption.js
+++ b/extensions/amp-lightbox-gallery/0.1/lightbox-caption.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {htmlFor} from '#core/dom/static-template';
 
 import {dev} from '../../../src/log';
diff --git a/extensions/amp-lightbox-gallery/0.1/lightbox-controls.css b/extensions/amp-lightbox-gallery/0.1/lightbox-controls.css
index fe3a45ca3029..334b91994cda 100644
--- a/extensions/amp-lightbox-gallery/0.1/lightbox-controls.css
+++ b/extensions/amp-lightbox-gallery/0.1/lightbox-controls.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 
 .i-amphtml-lbg-top-bar {
diff --git a/extensions/amp-lightbox-gallery/0.1/lightbox-controls.js b/extensions/amp-lightbox-gallery/0.1/lightbox-controls.js
index 886fcfcdb2b8..d77bbcd3d364 100644
--- a/extensions/amp-lightbox-gallery/0.1/lightbox-controls.js
+++ b/extensions/amp-lightbox-gallery/0.1/lightbox-controls.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {htmlFor} from '#core/dom/static-template';
 import {toArray} from '#core/types/array';
 import {dict} from '#core/types/object';
diff --git a/extensions/amp-lightbox-gallery/0.1/service/lightbox-manager-impl.js b/extensions/amp-lightbox-gallery/0.1/service/lightbox-manager-impl.js
index acc1a15406ce..f47c01657e29 100644
--- a/extensions/amp-lightbox-gallery/0.1/service/lightbox-manager-impl.js
+++ b/extensions/amp-lightbox-gallery/0.1/service/lightbox-manager-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 import {CommonSignals} from '#core/constants/common-signals';
 import {iterateCursor} from '#core/dom';
diff --git a/extensions/amp-lightbox-gallery/0.1/service/lightbox-placeholders.js b/extensions/amp-lightbox-gallery/0.1/service/lightbox-placeholders.js
index 40257db710ed..b4174b39c2e8 100644
--- a/extensions/amp-lightbox-gallery/0.1/service/lightbox-placeholders.js
+++ b/extensions/amp-lightbox-gallery/0.1/service/lightbox-placeholders.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 export const LIGHTBOX_THUMBNAIL_UNKNOWN =
   'data:image/svg+xml;charset=utf-8,<svg width="128" height="128" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><defs><path d="M9 20.5a1.5 1.5 0 0 1-3 0c0-6.488 5-8.53 5-13.5a4 4 0 1 0-8 0 1.5 1.5 0 0 1-3 0 7 7 0 1 1 14 0c0 5.483-5 7.485-5 13.5z" id="a"/><circle id="b" cx="7.5" cy="29.5" r="1.5"/></defs><g fill="none" fill-rule="evenodd"><path fill="#1E3B63" d="M0 0h128v128H0z"/><path d="M33 24.5h62a4 4 0 0 1 4 4v54.952L78.081 104.5H33a4 4 0 0 1-4-4v-72a4 4 0 0 1 4-4z" fill="#D1E5FF"/><g transform="translate(57 48)"><use fill="#225CAC" xlink:href="#a"/><path stroke="#225CAC" d="M9.5 20.5a2 2 0 1 1-4 0c0-2.85.756-4.755 2.58-7.59l.385-.595c.152-.236.265-.412.373-.584C10.006 9.873 10.5 8.601 10.5 7a3.5 3.5 0 1 0-7 0 2 2 0 1 1-4 0 7.5 7.5 0 0 1 15 0c0 2.273-.642 3.81-2.314 6.409l-.266.412C10.133 16.592 9.5 18.103 9.5 20.5z"/></g><g transform="translate(57 48)"><use fill="#225CAC" xlink:href="#b"/><circle stroke="#225CAC" cx="7.5" cy="29.5" r="2"/></g><path d="M82 83.5h17l-21 21v-17a4 4 0 0 1 4-4z" fill="#ACC8F0"/></g></svg>';
 export const LIGHTBOX_THUMBNAIL_AD =
diff --git a/extensions/amp-lightbox-gallery/0.1/swipe-to-dismiss.js b/extensions/amp-lightbox-gallery/0.1/swipe-to-dismiss.js
index a10e3526a651..28d4b9d1034b 100644
--- a/extensions/amp-lightbox-gallery/0.1/swipe-to-dismiss.js
+++ b/extensions/amp-lightbox-gallery/0.1/swipe-to-dismiss.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {setStyle, setStyles} from '#core/dom/style';
 
 import {delayAfterDeferringToEventLoop} from './utils';
diff --git a/extensions/amp-lightbox-gallery/0.1/test-e2e/test-carousel-0.2-declared.js b/extensions/amp-lightbox-gallery/0.1/test-e2e/test-carousel-0.2-declared.js
index 1ca32cc4d6a5..c7cc5629eba9 100644
--- a/extensions/amp-lightbox-gallery/0.1/test-e2e/test-carousel-0.2-declared.js
+++ b/extensions/amp-lightbox-gallery/0.1/test-e2e/test-carousel-0.2-declared.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const pageWidth = 800;
 const pageHeight = 600;
 
diff --git a/extensions/amp-lightbox-gallery/0.1/test-e2e/test-open-close.js b/extensions/amp-lightbox-gallery/0.1/test-e2e/test-open-close.js
index 39e67ffb2959..fa122611aad6 100644
--- a/extensions/amp-lightbox-gallery/0.1/test-e2e/test-open-close.js
+++ b/extensions/amp-lightbox-gallery/0.1/test-e2e/test-open-close.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const pageWidth = 800;
 const pageHeight = 600;
 
diff --git a/extensions/amp-lightbox-gallery/0.1/test/integration/test-amp-lightbox-gallery.js b/extensions/amp-lightbox-gallery/0.1/test/integration/test-amp-lightbox-gallery.js
index a70ae4a9d87a..1a597f61c1c1 100644
--- a/extensions/amp-lightbox-gallery/0.1/test/integration/test-amp-lightbox-gallery.js
+++ b/extensions/amp-lightbox-gallery/0.1/test/integration/test-amp-lightbox-gallery.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {poll} from '#testing/iframe';
 
 import * as analytics from '../../../../../src/analytics';
diff --git a/extensions/amp-lightbox-gallery/0.1/test/test-amp-lightbox-gallery.js b/extensions/amp-lightbox-gallery/0.1/test/test-amp-lightbox-gallery.js
index 8a5243486748..8d68d43ad666 100644
--- a/extensions/amp-lightbox-gallery/0.1/test/test-amp-lightbox-gallery.js
+++ b/extensions/amp-lightbox-gallery/0.1/test/test-amp-lightbox-gallery.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {installLightboxGallery} from '../amp-lightbox-gallery';
 
 const TAG = 'amp-lightbox-gallery';
diff --git a/extensions/amp-lightbox-gallery/0.1/utils.js b/extensions/amp-lightbox-gallery/0.1/utils.js
index 5b8224402cbc..f93d3a508f87 100644
--- a/extensions/amp-lightbox-gallery/0.1/utils.js
+++ b/extensions/amp-lightbox-gallery/0.1/utils.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 /**
  * @fileoverview Description of this file.
  */
diff --git a/extensions/amp-lightbox-gallery/1.0/amp-lightbox-gallery.css b/extensions/amp-lightbox-gallery/1.0/amp-lightbox-gallery.css
index 35f614504fbe..a9b271b382a0 100644
--- a/extensions/amp-lightbox-gallery/1.0/amp-lightbox-gallery.css
+++ b/extensions/amp-lightbox-gallery/1.0/amp-lightbox-gallery.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /* Pre-upgrade: not displayed */
 amp-lightbox-gallery[hidden] {
diff --git a/extensions/amp-lightbox-gallery/1.0/amp-lightbox-gallery.js b/extensions/amp-lightbox-gallery/1.0/amp-lightbox-gallery.js
index bcc99af06630..4447a46d1677 100644
--- a/extensions/amp-lightbox-gallery/1.0/amp-lightbox-gallery.js
+++ b/extensions/amp-lightbox-gallery/1.0/amp-lightbox-gallery.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust, DEFAULT_ACTION} from '#core/constants/action-constants';
 import {createElementWithAttributes} from '#core/dom';
 import {elementByTag} from '#core/dom/query';
diff --git a/extensions/amp-lightbox-gallery/1.0/base-element.js b/extensions/amp-lightbox-gallery/1.0/base-element.js
index 9d09c56a8c26..c54fc974ecee 100644
--- a/extensions/amp-lightbox-gallery/1.0/base-element.js
+++ b/extensions/amp-lightbox-gallery/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {toggleAttribute} from '#core/dom';
 import {
   childElement,
diff --git a/extensions/amp-lightbox-gallery/1.0/component.js b/extensions/amp-lightbox-gallery/1.0/component.js
index 9c249a0d6acc..30b8d790d251 100644
--- a/extensions/amp-lightbox-gallery/1.0/component.js
+++ b/extensions/amp-lightbox-gallery/1.0/component.js
@@ -1,18 +1,2 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 export {LightboxGalleryProvider} from './provider';
 export {WithLightbox} from './consumer';
diff --git a/extensions/amp-lightbox-gallery/1.0/component.jss.js b/extensions/amp-lightbox-gallery/1.0/component.jss.js
index 43e62ea4c571..337d7e58cdbc 100644
--- a/extensions/amp-lightbox-gallery/1.0/component.jss.js
+++ b/extensions/amp-lightbox-gallery/1.0/component.jss.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createUseStyles} from 'react-jss';
 
 const TOP_BAR_HEIGHT = 56;
diff --git a/extensions/amp-lightbox-gallery/1.0/component.type.js b/extensions/amp-lightbox-gallery/1.0/component.type.js
index 5e1ad95e610f..947d53dba0a2 100644
--- a/extensions/amp-lightbox-gallery/1.0/component.type.js
+++ b/extensions/amp-lightbox-gallery/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-lightbox-gallery/1.0/consumer.js b/extensions/amp-lightbox-gallery/1.0/consumer.js
index 44c2626931a9..a0015f0bf7bd 100644
--- a/extensions/amp-lightbox-gallery/1.0/consumer.js
+++ b/extensions/amp-lightbox-gallery/1.0/consumer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {sequentialIdGenerator} from '#core/data-structures/id-generator';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-lightbox-gallery/1.0/context.js b/extensions/amp-lightbox-gallery/1.0/context.js
index f0dbdc3ff282..aa02652b72c1 100644
--- a/extensions/amp-lightbox-gallery/1.0/context.js
+++ b/extensions/amp-lightbox-gallery/1.0/context.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {createContext} from '#preact';
 
 const LightboxGalleryContext = createContext(
diff --git a/extensions/amp-lightbox-gallery/1.0/provider.js b/extensions/amp-lightbox-gallery/1.0/provider.js
index 5c8cc0e6903b..97a668e60432 100644
--- a/extensions/amp-lightbox-gallery/1.0/provider.js
+++ b/extensions/amp-lightbox-gallery/1.0/provider.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import objstr from 'obj-str';
 
 import {mod} from '#core/math';
diff --git a/extensions/amp-lightbox-gallery/1.0/storybook/Basic.amp.js b/extensions/amp-lightbox-gallery/1.0/storybook/Basic.amp.js
index de2f574687ee..c568e548b373 100644
--- a/extensions/amp-lightbox-gallery/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-lightbox-gallery/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-lightbox-gallery/1.0/storybook/Basic.js b/extensions/amp-lightbox-gallery/1.0/storybook/Basic.js
index bfcec00b08ae..f2130e04f9e9 100644
--- a/extensions/amp-lightbox-gallery/1.0/storybook/Basic.js
+++ b/extensions/amp-lightbox-gallery/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withKnobs} from '@storybook/addon-knobs';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-lightbox-gallery/1.0/test/test-amp-lightbox-gallery.js b/extensions/amp-lightbox-gallery/1.0/test/test-amp-lightbox-gallery.js
index ba823124bb9e..0bce9fb1d0bd 100644
--- a/extensions/amp-lightbox-gallery/1.0/test/test-amp-lightbox-gallery.js
+++ b/extensions/amp-lightbox-gallery/1.0/test/test-amp-lightbox-gallery.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-lightbox-gallery';
 import {ActionTrust, DEFAULT_ACTION} from '#core/constants/action-constants';
 import {createElementWithAttributes} from '#core/dom';
diff --git a/extensions/amp-lightbox-gallery/1.0/test/test-component.js b/extensions/amp-lightbox-gallery/1.0/test/test-component.js
index 98fe2f34668a..5b6b459b7a5a 100644
--- a/extensions/amp-lightbox-gallery/1.0/test/test-component.js
+++ b/extensions/amp-lightbox-gallery/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {mount} from 'enzyme';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-lightbox-gallery/amp-lightbox-gallery.md b/extensions/amp-lightbox-gallery/amp-lightbox-gallery.md
index e51520fd5d15..991b5d9f9b63 100644
--- a/extensions/amp-lightbox-gallery/amp-lightbox-gallery.md
+++ b/extensions/amp-lightbox-gallery/amp-lightbox-gallery.md
@@ -7,22 +7,6 @@ teaser:
   text: Provides a "lightbox” experience. Upon user interaction, a UI component expands to fill the viewport until it is closed by the user.
 ---
 
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-lightbox-gallery
 
 ## Usage
diff --git a/extensions/amp-lightbox/0.1/amp-lightbox.css b/extensions/amp-lightbox/0.1/amp-lightbox.css
index 12dcff2d5ace..1ec46e6416af 100644
--- a/extensions/amp-lightbox/0.1/amp-lightbox.css
+++ b/extensions/amp-lightbox/0.1/amp-lightbox.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 amp-lightbox {
   display: none;
   position: fixed !important;
diff --git a/extensions/amp-lightbox/0.1/amp-lightbox.js b/extensions/amp-lightbox/0.1/amp-lightbox.js
index d04fff1d4848..f245ee8a49a2 100644
--- a/extensions/amp-lightbox/0.1/amp-lightbox.js
+++ b/extensions/amp-lightbox/0.1/amp-lightbox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {AmpEvents} from '#core/constants/amp-events';
 import {CSS} from '../../../build/amp-lightbox-0.1.css';
diff --git a/extensions/amp-lightbox/0.1/amp-lightbox.md b/extensions/amp-lightbox/0.1/amp-lightbox.md
index 95b6ffdf71ff..6eb52f663268 100644
--- a/extensions/amp-lightbox/0.1/amp-lightbox.md
+++ b/extensions/amp-lightbox/0.1/amp-lightbox.md
@@ -8,22 +8,6 @@ teaser:
   text: Displays elements in a full-viewport “lightbox” modal.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-lightbox
 
 ## Usage
diff --git a/extensions/amp-lightbox/0.1/test/test-amp-lightbox.js b/extensions/amp-lightbox/0.1/test/test-amp-lightbox.js
index c5bf6041f7f9..f831d6587845 100644
--- a/extensions/amp-lightbox/0.1/test/test-amp-lightbox.js
+++ b/extensions/amp-lightbox/0.1/test/test-amp-lightbox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-lightbox';
 import * as dom from '#core/dom';
 import {ActionService} from '#service/action-impl';
diff --git a/extensions/amp-lightbox/1.0/amp-lightbox.css b/extensions/amp-lightbox/1.0/amp-lightbox.css
index 9b3faf378ae0..21642c229a4e 100644
--- a/extensions/amp-lightbox/1.0/amp-lightbox.css
+++ b/extensions/amp-lightbox/1.0/amp-lightbox.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /* Pre-upgrade: not displayed */
 amp-lightbox[hidden] {
diff --git a/extensions/amp-lightbox/1.0/amp-lightbox.js b/extensions/amp-lightbox/1.0/amp-lightbox.js
index 6487c9ad6fe9..46fb604076ef 100644
--- a/extensions/amp-lightbox/1.0/amp-lightbox.js
+++ b/extensions/amp-lightbox/1.0/amp-lightbox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust, DEFAULT_ACTION} from '#core/constants/action-constants';
 import {BaseElement} from './base-element';
 import {CSS} from '../../../build/amp-lightbox-1.0.css';
diff --git a/extensions/amp-lightbox/1.0/base-element.js b/extensions/amp-lightbox/1.0/base-element.js
index 91df211ec055..cf2198d0c43d 100644
--- a/extensions/amp-lightbox/1.0/base-element.js
+++ b/extensions/amp-lightbox/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CSS as COMPONENT_CSS} from './component.jss';
 import {Lightbox} from './component';
 import {PreactBaseElement} from '#preact/base-element';
diff --git a/extensions/amp-lightbox/1.0/component.js b/extensions/amp-lightbox/1.0/component.js
index b904192f1848..8d7fd409a19c 100644
--- a/extensions/amp-lightbox/1.0/component.js
+++ b/extensions/amp-lightbox/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {ContainWrapper, useValueRef} from '#preact/component';
 import {Keys} from '#core/constants/key-codes';
diff --git a/extensions/amp-lightbox/1.0/component.jss.js b/extensions/amp-lightbox/1.0/component.jss.js
index 466103b0ec25..40f4ab17f411 100644
--- a/extensions/amp-lightbox/1.0/component.jss.js
+++ b/extensions/amp-lightbox/1.0/component.jss.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createUseStyles} from 'react-jss';
 
 const closeButton = {
diff --git a/extensions/amp-lightbox/1.0/component.type.js b/extensions/amp-lightbox/1.0/component.type.js
index 36704894887c..b45dec29d752 100644
--- a/extensions/amp-lightbox/1.0/component.type.js
+++ b/extensions/amp-lightbox/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 var LightboxDef = {};
diff --git a/extensions/amp-lightbox/1.0/storybook/Basic.amp.js b/extensions/amp-lightbox/1.0/storybook/Basic.amp.js
index 42bcd0351fdd..c67ca7e89ad4 100644
--- a/extensions/amp-lightbox/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-lightbox/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {boolean, select, text, withKnobs} from '@storybook/addon-knobs';
 import {withAmp} from '@ampproject/storybook-addon';
diff --git a/extensions/amp-lightbox/1.0/storybook/Basic.js b/extensions/amp-lightbox/1.0/storybook/Basic.js
index b2bc4c4d5ca0..15194b5d5d59 100644
--- a/extensions/amp-lightbox/1.0/storybook/Basic.js
+++ b/extensions/amp-lightbox/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {Lightbox} from '../component';
 import {boolean, select, text, withKnobs} from '@storybook/addon-knobs';
diff --git a/extensions/amp-lightbox/1.0/test-e2e/test-custom-close-button.js b/extensions/amp-lightbox/1.0/test-e2e/test-custom-close-button.js
index 2dc55d2d29af..42b7ce757b29 100644
--- a/extensions/amp-lightbox/1.0/test-e2e/test-custom-close-button.js
+++ b/extensions/amp-lightbox/1.0/test-e2e/test-custom-close-button.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-lightbox custom close button',
   {
diff --git a/extensions/amp-lightbox/1.0/test/test-amp-lightbox.js b/extensions/amp-lightbox/1.0/test/test-amp-lightbox.js
index 1e0479ee25bc..21be413a8f27 100644
--- a/extensions/amp-lightbox/1.0/test/test-amp-lightbox.js
+++ b/extensions/amp-lightbox/1.0/test/test-amp-lightbox.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import '../amp-lightbox';
 import {ActionInvocation} from '#service/action-impl';
 import {ActionTrust, DEFAULT_ACTION} from '#core/constants/action-constants';
diff --git a/extensions/amp-lightbox/1.0/test/test-component.js b/extensions/amp-lightbox/1.0/test/test-component.js
index 64e0d98928a7..43bf56b9c855 100644
--- a/extensions/amp-lightbox/1.0/test/test-component.js
+++ b/extensions/amp-lightbox/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {Lightbox} from '../component';
 import {mount} from 'enzyme';
diff --git a/extensions/amp-lightbox/amp-lightbox.md b/extensions/amp-lightbox/amp-lightbox.md
index 1c7ffd36e1d9..8a22e86841eb 100644
--- a/extensions/amp-lightbox/amp-lightbox.md
+++ b/extensions/amp-lightbox/amp-lightbox.md
@@ -8,22 +8,6 @@ experimental: true
 bento: true
 ---
 
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-lightbox
 
 ## Usage
diff --git a/extensions/amp-lightbox/test-e2e/test-amp-lightbox-autocomplete.js b/extensions/amp-lightbox/test-e2e/test-amp-lightbox-autocomplete.js
index b3517e72d3f4..d143f0f6fc62 100644
--- a/extensions/amp-lightbox/test-e2e/test-amp-lightbox-autocomplete.js
+++ b/extensions/amp-lightbox/test-e2e/test-amp-lightbox-autocomplete.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-lightbox with amp-autocomplete',
   {
diff --git a/extensions/amp-lightbox/test-e2e/test-amp-lightbox.js b/extensions/amp-lightbox/test-e2e/test-amp-lightbox.js
index ca290ee66314..c276cc81bfc6 100644
--- a/extensions/amp-lightbox/test-e2e/test-amp-lightbox.js
+++ b/extensions/amp-lightbox/test-e2e/test-amp-lightbox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-lightbox',
   {
diff --git a/extensions/amp-link-rewriter/0.1/amp-link-rewriter.js b/extensions/amp-link-rewriter/0.1/amp-link-rewriter.js
index eb05b524158a..4f8809623fa6 100644
--- a/extensions/amp-link-rewriter/0.1/amp-link-rewriter.js
+++ b/extensions/amp-link-rewriter/0.1/amp-link-rewriter.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Layout} from '#core/dom/layout';
 import {LinkRewriter} from './link-rewriter';
 import {Priority} from '#service/navigation';
diff --git a/extensions/amp-link-rewriter/0.1/config-options.js b/extensions/amp-link-rewriter/0.1/config-options.js
index 738924201035..ab5b383864d6 100644
--- a/extensions/amp-link-rewriter/0.1/config-options.js
+++ b/extensions/amp-link-rewriter/0.1/config-options.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {getChildJsonConfig} from '#core/dom';
 import {hasOwn} from '#core/types/object';
 import {user, userAssert} from '../../../src/log';
diff --git a/extensions/amp-link-rewriter/0.1/link-rewriter.js b/extensions/amp-link-rewriter/0.1/link-rewriter.js
index 544cbbbd3791..ff1acaa8ea61 100644
--- a/extensions/amp-link-rewriter/0.1/link-rewriter.js
+++ b/extensions/amp-link-rewriter/0.1/link-rewriter.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {getConfigOpts} from './config-options';
 import {getDataParamsFromAttributes} from '#core/dom';
diff --git a/extensions/amp-link-rewriter/0.1/scope.js b/extensions/amp-link-rewriter/0.1/scope.js
index a14535fe07a0..d4d890a5ef39 100644
--- a/extensions/amp-link-rewriter/0.1/scope.js
+++ b/extensions/amp-link-rewriter/0.1/scope.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {closestAncestorElementBySelector} from '#core/dom/query';
 import {iterateCursor} from '#core/dom';
 
diff --git a/extensions/amp-link-rewriter/0.1/test/test-amp-link-rewriter.js b/extensions/amp-link-rewriter/0.1/test/test-amp-link-rewriter.js
index 17d0f793067a..7e54ef4add8b 100644
--- a/extensions/amp-link-rewriter/0.1/test/test-amp-link-rewriter.js
+++ b/extensions/amp-link-rewriter/0.1/test/test-amp-link-rewriter.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {LinkRewriter} from '../link-rewriter';
 import {getConfigOpts} from '../config-options';
 import {getScopeElements} from '../scope';
diff --git a/extensions/amp-link-rewriter/0.1/test/test-helpers.js b/extensions/amp-link-rewriter/0.1/test/test-helpers.js
index d045fa5e102b..f24426fd0572 100644
--- a/extensions/amp-link-rewriter/0.1/test/test-helpers.js
+++ b/extensions/amp-link-rewriter/0.1/test/test-helpers.js
@@ -1,21 +1,5 @@
 import {LinkRewriter} from '../link-rewriter';
 
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const helpersMaker = () => {
   return {
     createLinkRewriterElement(config) {
diff --git a/extensions/amp-link-rewriter/0.1/test/test-noscope-document.js b/extensions/amp-link-rewriter/0.1/test/test-noscope-document.js
index 9b0895db904a..05f18df9b540 100644
--- a/extensions/amp-link-rewriter/0.1/test/test-noscope-document.js
+++ b/extensions/amp-link-rewriter/0.1/test/test-noscope-document.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import helpersMaker from './test-helpers';
 
 describes.fakeWin(
diff --git a/extensions/amp-list/0.1/amp-list.css b/extensions/amp-list/0.1/amp-list.css
index 600f80081746..d27117379dae 100644
--- a/extensions/amp-list/0.1/amp-list.css
+++ b/extensions/amp-list/0.1/amp-list.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /**
  * Show the error messaging container on fetch error.
diff --git a/extensions/amp-list/0.1/amp-list.js b/extensions/amp-list/0.1/amp-list.js
index ae11553f05ed..273724423d20 100644
--- a/extensions/amp-list/0.1/amp-list.js
+++ b/extensions/amp-list/0.1/amp-list.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {AmpEvents} from '#core/constants/amp-events';
 import {Deferred} from '#core/data-structures/promise';
diff --git a/extensions/amp-list/0.1/service/load-more-service.js b/extensions/amp-list/0.1/service/load-more-service.js
index 2b07d5d07830..d74a063c599b 100644
--- a/extensions/amp-list/0.1/service/load-more-service.js
+++ b/extensions/amp-list/0.1/service/load-more-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {childElementByAttr} from '#core/dom/query';
 import {htmlFor} from '#core/dom/static-template';
 import {setStyles} from '#core/dom/style';
diff --git a/extensions/amp-list/0.1/test-e2e/test-function-src.js b/extensions/amp-list/0.1/test-e2e/test-function-src.js
index 2d8051685503..6573b46ddfef 100644
--- a/extensions/amp-list/0.1/test-e2e/test-function-src.js
+++ b/extensions/amp-list/0.1/test-e2e/test-function-src.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-list "amp-script:" uri',
   {
diff --git a/extensions/amp-list/0.1/test-e2e/test-load-more-auto.js b/extensions/amp-list/0.1/test-e2e/test-load-more-auto.js
index 5b76d6053bb0..4891f40b15ac 100644
--- a/extensions/amp-list/0.1/test-e2e/test-load-more-auto.js
+++ b/extensions/amp-list/0.1/test-e2e/test-load-more-auto.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const pageWidth = 800;
 const pageHeight = 420; // unusually small to force a scrollbar
 
diff --git a/extensions/amp-list/0.1/test-e2e/test-load-more-manual.js b/extensions/amp-list/0.1/test-e2e/test-load-more-manual.js
index 6a094cc9bd58..6fac367c63d1 100644
--- a/extensions/amp-list/0.1/test-e2e/test-load-more-manual.js
+++ b/extensions/amp-list/0.1/test-e2e/test-load-more-manual.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const pageWidth = 600;
 const pageHeight = 600;
 
diff --git a/extensions/amp-list/0.1/test-e2e/test-ssr.js b/extensions/amp-list/0.1/test-e2e/test-ssr.js
index 88c0840335e6..064c98e17e99 100644
--- a/extensions/amp-list/0.1/test-e2e/test-ssr.js
+++ b/extensions/amp-list/0.1/test-e2e/test-ssr.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-list SSR templates',
   {
diff --git a/extensions/amp-list/0.1/test/integration/test-amp-list.js b/extensions/amp-list/0.1/test/integration/test-amp-list.js
index d04e8fb49167..804ff6aced73 100644
--- a/extensions/amp-list/0.1/test/integration/test-amp-list.js
+++ b/extensions/amp-list/0.1/test/integration/test-amp-list.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BrowserController} from '#testing/test-helper';
 
 const TIMEOUT = 15000;
diff --git a/extensions/amp-list/0.1/test/test-amp-list-container.js b/extensions/amp-list/0.1/test/test-amp-list-container.js
index b25e44eac701..297b8bbe2b9e 100644
--- a/extensions/amp-list/0.1/test/test-amp-list-container.js
+++ b/extensions/amp-list/0.1/test/test-amp-list-container.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {AmpDocService} from '#service/ampdoc-impl';
 
diff --git a/extensions/amp-list/0.1/test/test-amp-list-load-more.js b/extensions/amp-list/0.1/test/test-amp-list-load-more.js
index 9e645d5c0ecb..f27f3b8a8b48 100644
--- a/extensions/amp-list/0.1/test/test-amp-list-load-more.js
+++ b/extensions/amp-list/0.1/test/test-amp-list-load-more.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {toggleExperiment} from '#experiments';
 
 import {Services} from '#service';
diff --git a/extensions/amp-list/0.1/test/test-amp-list.js b/extensions/amp-list/0.1/test/test-amp-list.js
index 28cb0a2bab0f..e0990fc59982 100644
--- a/extensions/amp-list/0.1/test/test-amp-list.js
+++ b/extensions/amp-list/0.1/test/test-amp-list.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {AmpEvents} from '#core/constants/amp-events';
 import {Deferred} from '#core/data-structures/promise';
diff --git a/extensions/amp-list/amp-list.md b/extensions/amp-list/amp-list.md
index 43e6133f08b9..caa85f5854b7 100644
--- a/extensions/amp-list/amp-list.md
+++ b/extensions/amp-list/amp-list.md
@@ -8,22 +8,6 @@ teaser:
   text: Dynamically downloads data and creates list items using a template.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-list
 
 ## Usage
diff --git a/extensions/amp-live-list/0.1/amp-live-list.js b/extensions/amp-live-list/0.1/amp-live-list.js
index 3dcae470c261..3af8353b6bd1 100644
--- a/extensions/amp-live-list/0.1/amp-live-list.js
+++ b/extensions/amp-live-list/0.1/amp-live-list.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 import {Layout} from '#core/dom/layout';
 import {childElementByAttr} from '#core/dom/query';
diff --git a/extensions/amp-live-list/0.1/live-list-manager.js b/extensions/amp-live-list/0.1/live-list-manager.js
index e2c51d21c5c5..109759d81365 100644
--- a/extensions/amp-live-list/0.1/live-list-manager.js
+++ b/extensions/amp-live-list/0.1/live-list-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {extensionScriptsInNode} from '#service/extension-script';
 
diff --git a/extensions/amp-live-list/0.1/poller.js b/extensions/amp-live-list/0.1/poller.js
index 3d7bd2d249bd..51a6c3c1f837 100644
--- a/extensions/amp-live-list/0.1/poller.js
+++ b/extensions/amp-live-list/0.1/poller.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   exponentialBackoffClock,
   getJitter,
diff --git a/extensions/amp-live-list/0.1/test/test-amp-live-list.js b/extensions/amp-live-list/0.1/test/test-amp-live-list.js
index 1f801e5925a8..d98a302a2df2 100644
--- a/extensions/amp-live-list/0.1/test/test-amp-live-list.js
+++ b/extensions/amp-live-list/0.1/test/test-amp-live-list.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 
 import {AmpDocSingle} from '#service/ampdoc-impl';
diff --git a/extensions/amp-live-list/0.1/test/test-live-list-manager.js b/extensions/amp-live-list/0.1/test/test-live-list-manager.js
index 5d51bbab4ecb..12a81196498f 100644
--- a/extensions/amp-live-list/0.1/test/test-live-list-manager.js
+++ b/extensions/amp-live-list/0.1/test/test-live-list-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   AMP_LIVE_LIST_CUSTOM_SLOT_ID,
   LiveListManager,
diff --git a/extensions/amp-live-list/0.1/test/test-poller.js b/extensions/amp-live-list/0.1/test/test-poller.js
index 555b6216f3f0..69daa7b93ae4 100644
--- a/extensions/amp-live-list/0.1/test/test-poller.js
+++ b/extensions/amp-live-list/0.1/test/test-poller.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {Poller} from '../poller';
diff --git a/extensions/amp-loader/0.1/amp-loader.css b/extensions/amp-loader/0.1/amp-loader.css
index b251ef3cf802..c9974c245db3 100644
--- a/extensions/amp-loader/0.1/amp-loader.css
+++ b/extensions/amp-loader/0.1/amp-loader.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /* Placeholder */
 .i-amphtml-loader-background {
diff --git a/extensions/amp-loader/0.1/amp-loader.js b/extensions/amp-loader/0.1/amp-loader.js
index 984d95f3989d..17bb564f3606 100644
--- a/extensions/amp-loader/0.1/amp-loader.js
+++ b/extensions/amp-loader/0.1/amp-loader.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isIframeVideoPlayerComponent} from '#core/dom/layout';
 import {htmlFor} from '#core/dom/static-template';
 import {setImportantStyles, setStyle} from '#core/dom/style';
diff --git a/extensions/amp-loader/0.1/test/test-amp-loader.js b/extensions/amp-loader/0.1/test/test-amp-loader.js
index 6a4af912c754..ca1190eb9a99 100644
--- a/extensions/amp-loader/0.1/test/test-amp-loader.js
+++ b/extensions/amp-loader/0.1/test/test-amp-loader.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {getStyle} from '#core/dom/style';
 
 import {LoaderService} from '../amp-loader';
diff --git a/extensions/amp-mathml/0.1/amp-mathml.js b/extensions/amp-mathml/0.1/amp-mathml.js
index c6e32a722386..f3c50212d171 100644
--- a/extensions/amp-mathml/0.1/amp-mathml.js
+++ b/extensions/amp-mathml/0.1/amp-mathml.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeElement} from '#core/dom';
 import {Layout, applyFillContent} from '#core/dom/layout';
 import {setStyles} from '#core/dom/style';
diff --git a/extensions/amp-mathml/0.1/test/test-amp-mathml.js b/extensions/amp-mathml/0.1/test/test-amp-mathml.js
index 96700ab1b893..b83e9fea9c8d 100644
--- a/extensions/amp-mathml/0.1/test/test-amp-mathml.js
+++ b/extensions/amp-mathml/0.1/test/test-amp-mathml.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-mathml';
 
 describes.realWin(
diff --git a/extensions/amp-mega-menu/0.1/amp-mega-menu.css b/extensions/amp-mega-menu/0.1/amp-mega-menu.css
index 1db9f95cfe34..3d83eaa5b50f 100644
--- a/extensions/amp-mega-menu/0.1/amp-mega-menu.css
+++ b/extensions/amp-mega-menu/0.1/amp-mega-menu.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-mega-menu {
   z-index: 1000 !important;
diff --git a/extensions/amp-mega-menu/0.1/amp-mega-menu.js b/extensions/amp-mega-menu/0.1/amp-mega-menu.js
index db4fef9ee430..09494c772f77 100644
--- a/extensions/amp-mega-menu/0.1/amp-mega-menu.js
+++ b/extensions/amp-mega-menu/0.1/amp-mega-menu.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 import {Keys} from '#core/constants/key-codes';
 import {isConnectedNode, isRTL, tryFocus} from '#core/dom';
diff --git a/extensions/amp-mega-menu/0.1/test/test-amp-mega-menu.js b/extensions/amp-mega-menu/0.1/test/test-amp-mega-menu.js
index 5beacf960cf0..def7cdffbe33 100644
--- a/extensions/amp-mega-menu/0.1/test/test-amp-mega-menu.js
+++ b/extensions/amp-mega-menu/0.1/test/test-amp-mega-menu.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-mega-menu';
 import {Keys} from '#core/constants/key-codes';
 import {tryFocus} from '#core/dom';
diff --git a/extensions/amp-megaphone/0.1/amp-megaphone.js b/extensions/amp-megaphone/0.1/amp-megaphone.js
index 4872b88cca38..4ae0ccfea0e6 100644
--- a/extensions/amp-megaphone/0.1/amp-megaphone.js
+++ b/extensions/amp-megaphone/0.1/amp-megaphone.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Embeds a Megaphone podcast
  *
diff --git a/extensions/amp-megaphone/0.1/test/test-amp-megaphone.js b/extensions/amp-megaphone/0.1/test/test-amp-megaphone.js
index a63d6c60c6cc..408c73063e08 100644
--- a/extensions/amp-megaphone/0.1/test/test-amp-megaphone.js
+++ b/extensions/amp-megaphone/0.1/test/test-amp-megaphone.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-megaphone';
 
 describes.realWin(
diff --git a/extensions/amp-megaphone/amp-megaphone.md b/extensions/amp-megaphone/amp-megaphone.md
index 994d95080892..0104e3afe53b 100644
--- a/extensions/amp-megaphone/amp-megaphone.md
+++ b/extensions/amp-megaphone/amp-megaphone.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays a Megaphone.fm podcast episode or playlist.
 ---
 
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-megaphone
 
 ## Examples
diff --git a/extensions/amp-minute-media-player/0.1/amp-minute-media-player.js b/extensions/amp-minute-media-player/0.1/amp-minute-media-player.js
index 075cbcb55f32..412b386b4c8d 100644
--- a/extensions/amp-minute-media-player/0.1/amp-minute-media-player.js
+++ b/extensions/amp-minute-media-player/0.1/amp-minute-media-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {dispatchCustomEvent, removeElement} from '#core/dom';
 import {
diff --git a/extensions/amp-minute-media-player/0.1/test/test-amp-minute-media-player.js b/extensions/amp-minute-media-player/0.1/test/test-amp-minute-media-player.js
index 6ebedfcbab5a..e4084e0b0a6e 100644
--- a/extensions/amp-minute-media-player/0.1/test/test-amp-minute-media-player.js
+++ b/extensions/amp-minute-media-player/0.1/test/test-amp-minute-media-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-minute-media-player';
 import * as fullscreen from '#core/dom/fullscreen';
 
diff --git a/extensions/amp-mowplayer/0.1/amp-mowplayer.js b/extensions/amp-mowplayer/0.1/amp-mowplayer.js
index 35bbd89726a8..7a6a5d2179df 100644
--- a/extensions/amp-mowplayer/0.1/amp-mowplayer.js
+++ b/extensions/amp-mowplayer/0.1/amp-mowplayer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {dispatchCustomEvent, removeElement} from '#core/dom';
 import {
diff --git a/extensions/amp-mowplayer/0.1/test/test-amp-mowplayer.js b/extensions/amp-mowplayer/0.1/test/test-amp-mowplayer.js
index dd61f107cf1e..850c548e4fdc 100644
--- a/extensions/amp-mowplayer/0.1/test/test-amp-mowplayer.js
+++ b/extensions/amp-mowplayer/0.1/test/test-amp-mowplayer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-mowplayer';
 import {createElementWithAttributes} from '#core/dom';
 
diff --git a/extensions/amp-mraid/0.1/amp-mraid.js b/extensions/amp-mraid/0.1/amp-mraid.js
index 9b7110cba65b..640f1217a2e9 100644
--- a/extensions/amp-mraid/0.1/amp-mraid.js
+++ b/extensions/amp-mraid/0.1/amp-mraid.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Connects AMP Host Services to MRAID to allow invoking native
  * APIs from mobile app ad webviews.
diff --git a/extensions/amp-mraid/0.1/mraid-service.js b/extensions/amp-mraid/0.1/mraid-service.js
index d5f6143c330a..ffed2e662fd6 100644
--- a/extensions/amp-mraid/0.1/mraid-service.js
+++ b/extensions/amp-mraid/0.1/mraid-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {layoutRectLtwh} from '#core/dom/layout/rect';
 
 import {
diff --git a/extensions/amp-mustache/0.1/amp-mustache.js b/extensions/amp-mustache/0.1/amp-mustache.js
index dd5130f94b6f..07c0437160c1 100644
--- a/extensions/amp-mustache/0.1/amp-mustache.js
+++ b/extensions/amp-mustache/0.1/amp-mustache.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BaseTemplate} from '../../../src/base-template';
 import {dict} from '#core/types/object';
 import {iterateCursor, templateContentClone} from '#core/dom';
diff --git a/extensions/amp-mustache/0.1/test/test-amp-mustache.js b/extensions/amp-mustache/0.1/test/test-amp-mustache.js
index 8b9bd8d32561..923af455a682 100644
--- a/extensions/amp-mustache/0.1/test/test-amp-mustache.js
+++ b/extensions/amp-mustache/0.1/test/test-amp-mustache.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as sanitizer from '../../../../src/sanitizer';
 import * as service from '../../../../src/service-helpers';
 import {AmpMustache} from '../amp-mustache';
diff --git a/extensions/amp-mustache/0.2/amp-mustache.js b/extensions/amp-mustache/0.2/amp-mustache.js
index 77f253bd44a3..5e8e067df46c 100644
--- a/extensions/amp-mustache/0.2/amp-mustache.js
+++ b/extensions/amp-mustache/0.2/amp-mustache.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BaseTemplate} from '../../../src/base-template';
 import {Purifier} from '#purifier';
 import {dict} from '#core/types/object';
diff --git a/extensions/amp-mustache/0.2/test/test-amp-mustache.js b/extensions/amp-mustache/0.2/test/test-amp-mustache.js
index a897883f7879..9ac23e9a22b1 100644
--- a/extensions/amp-mustache/0.2/test/test-amp-mustache.js
+++ b/extensions/amp-mustache/0.2/test/test-amp-mustache.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as service from '../../../../src/service-helpers';
 import {AmpMustache} from '../amp-mustache';
 import {Purifier} from '#purifier';
diff --git a/extensions/amp-mustache/amp-mustache.md b/extensions/amp-mustache/amp-mustache.md
index a805620e9e24..14f00b385f60 100644
--- a/extensions/amp-mustache/amp-mustache.md
+++ b/extensions/amp-mustache/amp-mustache.md
@@ -8,22 +8,6 @@ teaser:
   text: Allows rendering of Mustache templates.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-mustache
 
 ## Version notes
diff --git a/extensions/amp-nested-menu/0.1/amp-nested-menu.css b/extensions/amp-nested-menu/0.1/amp-nested-menu.css
index db39ef2f9e13..dacad72ce749 100644
--- a/extensions/amp-nested-menu/0.1/amp-nested-menu.css
+++ b/extensions/amp-nested-menu/0.1/amp-nested-menu.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-nested-menu,
 amp-nested-menu [amp-nested-submenu] {
diff --git a/extensions/amp-nested-menu/0.1/amp-nested-menu.js b/extensions/amp-nested-menu/0.1/amp-nested-menu.js
index e7e0b13219c7..96ba499735d9 100644
--- a/extensions/amp-nested-menu/0.1/amp-nested-menu.js
+++ b/extensions/amp-nested-menu/0.1/amp-nested-menu.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Keys} from '#core/constants/key-codes';
 import {isRTL, tryFocus} from '#core/dom';
 import {Layout} from '#core/dom/layout';
diff --git a/extensions/amp-nested-menu/0.1/test/test-amp-nested-menu.js b/extensions/amp-nested-menu/0.1/test/test-amp-nested-menu.js
index fa545a0ad4cd..67fcdccbfcd8 100644
--- a/extensions/amp-nested-menu/0.1/test/test-amp-nested-menu.js
+++ b/extensions/amp-nested-menu/0.1/test/test-amp-nested-menu.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-nested-menu';
 import * as fakeTimers from '@sinonjs/fake-timers';
 
diff --git a/extensions/amp-next-page/0.1/amp-next-page.js b/extensions/amp-next-page/0.1/amp-next-page.js
index 53f0ccb8f91d..63d22ad79d0d 100644
--- a/extensions/amp-next-page/0.1/amp-next-page.js
+++ b/extensions/amp-next-page/0.1/amp-next-page.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CONSENT_POLICY_STATE} from '#core/constants/consent-state';
 import {isJsonScriptTag, removeElement} from '#core/dom';
 import {Layout} from '#core/dom/layout';
diff --git a/extensions/amp-next-page/0.1/amp-next-page.md b/extensions/amp-next-page/0.1/amp-next-page.md
index 339a92e9cec9..f9905cde56c2 100644
--- a/extensions/amp-next-page/0.1/amp-next-page.md
+++ b/extensions/amp-next-page/0.1/amp-next-page.md
@@ -7,22 +7,6 @@ teaser:
 experimental: true
 ---
 
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-next-page
 
 ## Usage
diff --git a/extensions/amp-next-page/0.1/config.js b/extensions/amp-next-page/0.1/config.js
index 329e430162c8..912dfb42dab0 100644
--- a/extensions/amp-next-page/0.1/config.js
+++ b/extensions/amp-next-page/0.1/config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isArray} from '#core/types';
 
 import {Services} from '#service';
diff --git a/extensions/amp-next-page/0.1/next-page-service.js b/extensions/amp-next-page/0.1/next-page-service.js
index 430c24907f57..47e79dee7a8b 100644
--- a/extensions/amp-next-page/0.1/next-page-service.js
+++ b/extensions/amp-next-page/0.1/next-page-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {VisibilityState} from '#core/constants/visibility-state';
 import {removeElement} from '#core/dom';
 import {layoutRectLtwh} from '#core/dom/layout/rect';
diff --git a/extensions/amp-next-page/0.1/test/test-amp-next-page.js b/extensions/amp-next-page/0.1/test/test-amp-next-page.js
index 6c2576efb12c..8a79149b525a 100644
--- a/extensions/amp-next-page/0.1/test/test-amp-next-page.js
+++ b/extensions/amp-next-page/0.1/test/test-amp-next-page.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {VisibilityState} from '#core/constants/visibility-state';
 import {layoutRectLtwh} from '#core/dom/layout/rect';
 import {setStyle} from '#core/dom/style';
diff --git a/extensions/amp-next-page/0.1/test/test-config.js b/extensions/amp-next-page/0.1/test/test-config.js
index f24804b5324a..d7c363c3acfb 100644
--- a/extensions/amp-next-page/0.1/test/test-config.js
+++ b/extensions/amp-next-page/0.1/test/test-config.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Services} from '#service';
 
 import {parseUrlDeprecated} from '../../../../src/url';
diff --git a/extensions/amp-next-page/1.0/amp-next-page.js b/extensions/amp-next-page/1.0/amp-next-page.js
index e10c0afbad58..98a9d34623c2 100644
--- a/extensions/amp-next-page/1.0/amp-next-page.js
+++ b/extensions/amp-next-page/1.0/amp-next-page.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Layout} from '#core/dom/layout';
 
 import {Services} from '#service';
diff --git a/extensions/amp-next-page/1.0/page.js b/extensions/amp-next-page/1.0/page.js
index e657eab4bc89..ac65238227eb 100644
--- a/extensions/amp-next-page/1.0/page.js
+++ b/extensions/amp-next-page/1.0/page.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {VisibilityState} from '#core/constants/visibility-state';
 
 import {ViewportRelativePos} from './visibility-observer';
diff --git a/extensions/amp-next-page/1.0/service.js b/extensions/amp-next-page/1.0/service.js
index f15ce97e8055..c9d701f14584 100644
--- a/extensions/amp-next-page/1.0/service.js
+++ b/extensions/amp-next-page/1.0/service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {VisibilityState} from '#core/constants/visibility-state';
 import {
   insertAtStart,
diff --git a/extensions/amp-next-page/1.0/test/test-amp-next-page.js b/extensions/amp-next-page/1.0/test/test-amp-next-page.js
index 61a52c4321c2..e51df7060e9e 100644
--- a/extensions/amp-next-page/1.0/test/test-amp-next-page.js
+++ b/extensions/amp-next-page/1.0/test/test-amp-next-page.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import '../amp-next-page';
 import {VisibilityState} from '#core/constants/visibility-state';
 import {htmlFor} from '#core/dom/static-template';
diff --git a/extensions/amp-next-page/1.0/test/test-config.js b/extensions/amp-next-page/1.0/test/test-config.js
index ffaada74e815..a1e6edb47884 100644
--- a/extensions/amp-next-page/1.0/test/test-config.js
+++ b/extensions/amp-next-page/1.0/test/test-config.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Page} from '../page';
 import {validatePage} from '../utils';
 
diff --git a/extensions/amp-next-page/1.0/utils.js b/extensions/amp-next-page/1.0/utils.js
index 111c7a150cf1..e69b909e6c50 100644
--- a/extensions/amp-next-page/1.0/utils.js
+++ b/extensions/amp-next-page/1.0/utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {user, userAssert} from '../../../src/log';
 import {
   getSourceOrigin,
diff --git a/extensions/amp-next-page/1.0/visibility-observer.js b/extensions/amp-next-page/1.0/visibility-observer.js
index 828d6ee9936d..f5ace7c42c10 100644
--- a/extensions/amp-next-page/1.0/visibility-observer.js
+++ b/extensions/amp-next-page/1.0/visibility-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {RelativePositions} from '#core/dom/layout/rect';
 import {throttle} from '#core/types/function';
 
diff --git a/extensions/amp-nexxtv-player/0.1/amp-nexxtv-player.js b/extensions/amp-nexxtv-player/0.1/amp-nexxtv-player.js
index 13fd02e6f36d..88280d63d115 100644
--- a/extensions/amp-nexxtv-player/0.1/amp-nexxtv-player.js
+++ b/extensions/amp-nexxtv-player/0.1/amp-nexxtv-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {removeElement} from '#core/dom';
 import {
diff --git a/extensions/amp-nexxtv-player/0.1/test/test-amp-nexxtv-player.js b/extensions/amp-nexxtv-player/0.1/test/test-amp-nexxtv-player.js
index ca4b6b979a19..36a2aab3a9f8 100644
--- a/extensions/amp-nexxtv-player/0.1/test/test-amp-nexxtv-player.js
+++ b/extensions/amp-nexxtv-player/0.1/test/test-amp-nexxtv-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-nexxtv-player';
 import {createElementWithAttributes} from '#core/dom';
 
diff --git a/extensions/amp-nexxtv-player/amp-nexxtv-player.md b/extensions/amp-nexxtv-player/amp-nexxtv-player.md
index 888972f2aab9..1b9277485fc0 100644
--- a/extensions/amp-nexxtv-player/amp-nexxtv-player.md
+++ b/extensions/amp-nexxtv-player/amp-nexxtv-player.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays a media stream from the nexxOMNIA platform.
 ---
 
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-nexxtv-player
 
 ## Example
diff --git a/extensions/amp-o2-player/0.1/amp-o2-player.js b/extensions/amp-o2-player/0.1/amp-o2-player.js
index 0e7061240404..4e49ab98f2ab 100644
--- a/extensions/amp-o2-player/0.1/amp-o2-player.js
+++ b/extensions/amp-o2-player/0.1/amp-o2-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {MessageType} from '#core/3p-frame-messaging';
 import {CONSENT_POLICY_STATE} from '#core/constants/consent-state';
 import {applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
diff --git a/extensions/amp-o2-player/0.1/test/test-amp-o2-player.js b/extensions/amp-o2-player/0.1/test/test-amp-o2-player.js
index 57f511374a07..f8635bea89ca 100644
--- a/extensions/amp-o2-player/0.1/test/test-amp-o2-player.js
+++ b/extensions/amp-o2-player/0.1/test/test-amp-o2-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-o2-player';
 import {MessageType} from '#core/3p-frame-messaging';
 import {CONSENT_POLICY_STATE} from '#core/constants/consent-state';
diff --git a/extensions/amp-onetap-google/0.1/amp-onetap-google.css b/extensions/amp-onetap-google/0.1/amp-onetap-google.css
index c0a00baa915e..0fd04458ad0f 100644
--- a/extensions/amp-onetap-google/0.1/amp-onetap-google.css
+++ b/extensions/amp-onetap-google/0.1/amp-onetap-google.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
  .i-amphtml-onetap-google-iframe {
   z-index: 2147483647;
diff --git a/extensions/amp-onetap-google/0.1/test/test-amp-onetap-google.js b/extensions/amp-onetap-google/0.1/test/test-amp-onetap-google.js
index 0085a8b76a1a..ee7bb3f48acb 100644
--- a/extensions/amp-onetap-google/0.1/test/test-amp-onetap-google.js
+++ b/extensions/amp-onetap-google/0.1/test/test-amp-onetap-google.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-onetap-google';
 import {createElementWithAttributes, waitForChild} from '#core/dom';
 
diff --git a/extensions/amp-onetap-google/amp-onetap-google.md b/extensions/amp-onetap-google/amp-onetap-google.md
index 8faa2e7b92fc..e146d106dadf 100644
--- a/extensions/amp-onetap-google/amp-onetap-google.md
+++ b/extensions/amp-onetap-google/amp-onetap-google.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays Google One Tap.
 ---
 
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-onetap-google
 
 ## Overview
diff --git a/extensions/amp-ooyala-player/0.1/amp-ooyala-player.js b/extensions/amp-ooyala-player/0.1/amp-ooyala-player.js
index 1210714b0237..4ab662d38fda 100644
--- a/extensions/amp-ooyala-player/0.1/amp-ooyala-player.js
+++ b/extensions/amp-ooyala-player/0.1/amp-ooyala-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {dispatchCustomEvent, removeElement} from '#core/dom';
 import {
diff --git a/extensions/amp-ooyala-player/0.1/test/test-amp-ooyala.js b/extensions/amp-ooyala-player/0.1/test/test-amp-ooyala.js
index ae3b1b32d7f2..9657a2d622ec 100644
--- a/extensions/amp-ooyala-player/0.1/test/test-amp-ooyala.js
+++ b/extensions/amp-ooyala-player/0.1/test/test-amp-ooyala.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-ooyala-player';
 import * as fullscreen from '#core/dom/fullscreen';
 
diff --git a/extensions/amp-ooyala-player/amp-ooyala-player.md b/extensions/amp-ooyala-player/amp-ooyala-player.md
index 486468029ea9..24587c054c0d 100644
--- a/extensions/amp-ooyala-player/amp-ooyala-player.md
+++ b/extensions/amp-ooyala-player/amp-ooyala-player.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays an Ooyala video.
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-ooyala-player
 
 ## Example
diff --git a/extensions/amp-orientation-observer/0.1/amp-orientation-observer.js b/extensions/amp-orientation-observer/0.1/amp-orientation-observer.js
index 075c6f99c10a..7a225b6d823a 100644
--- a/extensions/amp-orientation-observer/0.1/amp-orientation-observer.js
+++ b/extensions/amp-orientation-observer/0.1/amp-orientation-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {clamp, sum} from '#core/math';
 import {dict} from '#core/types/object';
diff --git a/extensions/amp-orientation-observer/0.1/test/test-amp-orientation-observer.js b/extensions/amp-orientation-observer/0.1/test/test-amp-orientation-observer.js
index 9723460dede6..44b7d07cbe35 100644
--- a/extensions/amp-orientation-observer/0.1/test/test-amp-orientation-observer.js
+++ b/extensions/amp-orientation-observer/0.1/test/test-amp-orientation-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpOrientationObserver} from '../amp-orientation-observer';
 
 describes.realWin(
diff --git a/extensions/amp-orientation-observer/amp-orientation-observer.md b/extensions/amp-orientation-observer/amp-orientation-observer.md
index 0b5bdd898368..7e7138bb52ad 100644
--- a/extensions/amp-orientation-observer/amp-orientation-observer.md
+++ b/extensions/amp-orientation-observer/amp-orientation-observer.md
@@ -6,22 +6,6 @@ teaser:
   text: Monitors the orientation of an element within the viewport as a user scrolls, and dispatches events that can be used with other AMP components.
 ---
 
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-orientation-observer
 
 ## Usage
diff --git a/extensions/amp-pan-zoom/0.1/amp-pan-zoom.css b/extensions/amp-pan-zoom/0.1/amp-pan-zoom.css
index c3ecfbbe8d1e..7cd42375152d 100644
--- a/extensions/amp-pan-zoom/0.1/amp-pan-zoom.css
+++ b/extensions/amp-pan-zoom/0.1/amp-pan-zoom.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
  .i-amphtml-pan-zoom {
    display: flex;
diff --git a/extensions/amp-pan-zoom/0.1/amp-pan-zoom.js b/extensions/amp-pan-zoom/0.1/amp-pan-zoom.js
index 1b0fe523d555..f6313e91598e 100644
--- a/extensions/amp-pan-zoom/0.1/amp-pan-zoom.js
+++ b/extensions/amp-pan-zoom/0.1/amp-pan-zoom.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {bezierCurve} from '#core/data-structures/curve';
 import {dispatchCustomEvent} from '#core/dom';
diff --git a/extensions/amp-pan-zoom/0.1/test/integration/test-amp-pan-zoom.js b/extensions/amp-pan-zoom/0.1/test/integration/test-amp-pan-zoom.js
index 0246f1a9ff0d..c536f03a6151 100644
--- a/extensions/amp-pan-zoom/0.1/test/integration/test-amp-pan-zoom.js
+++ b/extensions/amp-pan-zoom/0.1/test/integration/test-amp-pan-zoom.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 
 import {toggleExperiment} from '#experiments';
diff --git a/extensions/amp-pan-zoom/0.1/test/test-amp-pan-zoom.js b/extensions/amp-pan-zoom/0.1/test/test-amp-pan-zoom.js
index 585b575a8ca4..1cc923ebdf5a 100644
--- a/extensions/amp-pan-zoom/0.1/test/test-amp-pan-zoom.js
+++ b/extensions/amp-pan-zoom/0.1/test/test-amp-pan-zoom.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-pan-zoom';
 import {htmlFor} from '#core/dom/static-template';
 import {setStyles} from '#core/dom/style';
diff --git a/extensions/amp-pan-zoom/amp-pan-zoom.md b/extensions/amp-pan-zoom/amp-pan-zoom.md
index f7ac26716495..98e905c7538b 100644
--- a/extensions/amp-pan-zoom/amp-pan-zoom.md
+++ b/extensions/amp-pan-zoom/amp-pan-zoom.md
@@ -6,22 +6,6 @@ teaser:
   text: Provides zooming and panning for arbitrary content.
 ---
 
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-pan-zoom
 
 ## Usage
diff --git a/extensions/amp-pinterest/0.1/amp-pinterest.css b/extensions/amp-pinterest/0.1/amp-pinterest.css
index edeaa7fbedaa..d84ead3520f0 100644
--- a/extensions/amp-pinterest/0.1/amp-pinterest.css
+++ b/extensions/amp-pinterest/0.1/amp-pinterest.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /* round buttons */
 
diff --git a/extensions/amp-pinterest/0.1/follow-button.js b/extensions/amp-pinterest/0.1/follow-button.js
index 69bddb09f287..f137370404e7 100644
--- a/extensions/amp-pinterest/0.1/follow-button.js
+++ b/extensions/amp-pinterest/0.1/follow-button.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {tryResolve} from '#core/data-structures/promise';
 
 import {Util} from './util';
diff --git a/extensions/amp-pinterest/0.1/pin-widget.js b/extensions/amp-pinterest/0.1/pin-widget.js
index 5cdca098231c..2c0ca07b7c2d 100644
--- a/extensions/amp-pinterest/0.1/pin-widget.js
+++ b/extensions/amp-pinterest/0.1/pin-widget.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Keys} from '#core/constants/key-codes';
 import {measureIntersection} from '#core/dom/layout/intersection';
 import {toWin} from '#core/window';
diff --git a/extensions/amp-pinterest/0.1/save-button.js b/extensions/amp-pinterest/0.1/save-button.js
index 8bb295cc1ac2..04033d161ab1 100644
--- a/extensions/amp-pinterest/0.1/save-button.js
+++ b/extensions/amp-pinterest/0.1/save-button.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {toWin} from '#core/window';
 
 import {Services} from '#service';
diff --git a/extensions/amp-pinterest/0.1/util.js b/extensions/amp-pinterest/0.1/util.js
index 79b2ed623171..10c3b86d9211 100644
--- a/extensions/amp-pinterest/0.1/util.js
+++ b/extensions/amp-pinterest/0.1/util.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // characters to be used in the creation of guids
 const BASE60 = '0123456789ABCDEFGHJKLMNPQRSTUVWXYZ_abcdefghijkmnopqrstuvwxyz';
 
diff --git a/extensions/amp-playbuzz/0.1/amp-playbuzz.css b/extensions/amp-playbuzz/0.1/amp-playbuzz.css
index d0a8bdecc3a5..fa72967ba7b3 100644
--- a/extensions/amp-playbuzz/0.1/amp-playbuzz.css
+++ b/extensions/amp-playbuzz/0.1/amp-playbuzz.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .pb-overflow[overflow] {
         width: 100%;
diff --git a/extensions/amp-playbuzz/0.1/amp-playbuzz.js b/extensions/amp-playbuzz/0.1/amp-playbuzz.js
index 5436efce0b75..ac9390143b4d 100644
--- a/extensions/amp-playbuzz/0.1/amp-playbuzz.js
+++ b/extensions/amp-playbuzz/0.1/amp-playbuzz.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Embeds an playbuzz item.
  * The src attribute can be easily copied from a normal playbuzz URL.
diff --git a/extensions/amp-playbuzz/0.1/images.js b/extensions/amp-playbuzz/0.1/images.js
index 502d1a587f63..1d087aea8575 100644
--- a/extensions/amp-playbuzz/0.1/images.js
+++ b/extensions/amp-playbuzz/0.1/images.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /*eslint-disable */
     export const logo = 'data:image/png;base64,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';
 
diff --git a/extensions/amp-playbuzz/0.1/test/test-amp-playbuzz.js b/extensions/amp-playbuzz/0.1/test/test-amp-playbuzz.js
index 86b069ce6790..9da383ee4edb 100644
--- a/extensions/amp-playbuzz/0.1/test/test-amp-playbuzz.js
+++ b/extensions/amp-playbuzz/0.1/test/test-amp-playbuzz.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-playbuzz';
 
 describes.realWin(
diff --git a/extensions/amp-playbuzz/0.1/utils.js b/extensions/amp-playbuzz/0.1/utils.js
index 6b863252a204..c341f409c026 100644
--- a/extensions/amp-playbuzz/0.1/utils.js
+++ b/extensions/amp-playbuzz/0.1/utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {rethrowAsync} from '#core/error';
 import {dict} from '#core/types/object';
 import {parseJson} from '#core/types/object/json';
diff --git a/extensions/amp-position-observer/0.1/amp-position-observer.js b/extensions/amp-position-observer/0.1/amp-position-observer.js
index 6841768cd74a..3c804313a33d 100644
--- a/extensions/amp-position-observer/0.1/amp-position-observer.js
+++ b/extensions/amp-position-observer/0.1/amp-position-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {
   assertLength,
diff --git a/extensions/amp-position-observer/0.1/test-e2e/test-scrollbound-animation.js b/extensions/amp-position-observer/0.1/test-e2e/test-scrollbound-animation.js
index 98574b0602f2..638f02535e9d 100644
--- a/extensions/amp-position-observer/0.1/test-e2e/test-scrollbound-animation.js
+++ b/extensions/amp-position-observer/0.1/test-e2e/test-scrollbound-animation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-position-observer in AMPHTML ad',
   {
diff --git a/extensions/amp-position-observer/0.1/test-e2e/test-target-id.js b/extensions/amp-position-observer/0.1/test-e2e/test-target-id.js
index c7cf75892820..255b7f5cf49b 100644
--- a/extensions/amp-position-observer/0.1/test-e2e/test-target-id.js
+++ b/extensions/amp-position-observer/0.1/test-e2e/test-target-id.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-position-observer target in AMPHTML ad',
   {
diff --git a/extensions/amp-position-observer/0.1/test/test-amp-position-observer.js b/extensions/amp-position-observer/0.1/test/test-amp-position-observer.js
index bda26ae4110d..1dedb8c57134 100644
--- a/extensions/amp-position-observer/0.1/test/test-amp-position-observer.js
+++ b/extensions/amp-position-observer/0.1/test/test-amp-position-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {RelativePositions, layoutRectLtwh} from '#core/dom/layout/rect';
 
 import {AmpVisibilityObserver} from '../amp-position-observer';
diff --git a/extensions/amp-position-observer/amp-position-observer.md b/extensions/amp-position-observer/amp-position-observer.md
index c7ae6f6e4aa8..049d8dd657fc 100644
--- a/extensions/amp-position-observer/amp-position-observer.md
+++ b/extensions/amp-position-observer/amp-position-observer.md
@@ -7,22 +7,6 @@ teaser:
   text: Monitors the position of an element within the viewport as a user scrolls, and dispatches events that can be used with other AMP components.
 ---
 
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-position-observer
 
 ## Usage
diff --git a/extensions/amp-powr-player/0.1/amp-powr-player.js b/extensions/amp-powr-player/0.1/amp-powr-player.js
index 092a34ed45be..715eb0dca0a8 100644
--- a/extensions/amp-powr-player/0.1/amp-powr-player.js
+++ b/extensions/amp-powr-player/0.1/amp-powr-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {
   dispatchCustomEvent,
diff --git a/extensions/amp-powr-player/0.1/test/test-amp-powr-player.js b/extensions/amp-powr-player/0.1/test/test-amp-powr-player.js
index ba58d81f98f6..7e37b2c6f844 100644
--- a/extensions/amp-powr-player/0.1/test/test-amp-powr-player.js
+++ b/extensions/amp-powr-player/0.1/test/test-amp-powr-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-powr-player';
 import {listenOncePromise} from '../../../../src/event-helper';
 import {parseUrlDeprecated} from '../../../../src/url';
diff --git a/extensions/amp-powr-player/amp-powr-player.md b/extensions/amp-powr-player/amp-powr-player.md
index f1a35de3ebc2..49a135164c08 100644
--- a/extensions/amp-powr-player/amp-powr-player.md
+++ b/extensions/amp-powr-player/amp-powr-player.md
@@ -6,22 +6,6 @@ teaser:
   text: An amp-powr-player component displays the Powr Player as configured in the Powr platform.
 ---
 
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-powr-player
 
 ## Example
diff --git a/extensions/amp-reach-player/0.1/amp-reach-player.js b/extensions/amp-reach-player/0.1/amp-reach-player.js
index a77a9ac2230f..a5639a0d06b3 100644
--- a/extensions/amp-reach-player/0.1/amp-reach-player.js
+++ b/extensions/amp-reach-player/0.1/amp-reach-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
 import {PauseHelper} from '#core/dom/video/pause-helper';
 
diff --git a/extensions/amp-reach-player/0.1/test/test-amp-reach-player.js b/extensions/amp-reach-player/0.1/test/test-amp-reach-player.js
index f233dde88600..332ee1f0129b 100644
--- a/extensions/amp-reach-player/0.1/test/test-amp-reach-player.js
+++ b/extensions/amp-reach-player/0.1/test/test-amp-reach-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-reach-player';
 
 describes.realWin(
diff --git a/extensions/amp-reach-player/amp-reach-player.md b/extensions/amp-reach-player/amp-reach-player.md
index 482e1ca5a5c9..b895773e5eda 100644
--- a/extensions/amp-reach-player/amp-reach-player.md
+++ b/extensions/amp-reach-player/amp-reach-player.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays a Beachfront Reach video player.
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-reach-player
 
 Displays the Reach Player configured in the [Beachfront Reach](http://beachfrontreach.com) platform.
diff --git a/extensions/amp-recaptcha-input/0.1/amp-recaptcha-input.css b/extensions/amp-recaptcha-input/0.1/amp-recaptcha-input.css
index 8fa2c2b68f09..eb42bf7fecf4 100644
--- a/extensions/amp-recaptcha-input/0.1/amp-recaptcha-input.css
+++ b/extensions/amp-recaptcha-input/0.1/amp-recaptcha-input.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .i-amphtml-recaptcha-iframe {
   position: fixed !important;
diff --git a/extensions/amp-recaptcha-input/0.1/amp-recaptcha-input.js b/extensions/amp-recaptcha-input/0.1/amp-recaptcha-input.js
index 041908432df7..595e563c80fd 100644
--- a/extensions/amp-recaptcha-input/0.1/amp-recaptcha-input.js
+++ b/extensions/amp-recaptcha-input/0.1/amp-recaptcha-input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Async Input Element that uses the
  * amp-recaptcha-service to dispatch actions, and return
diff --git a/extensions/amp-recaptcha-input/0.1/amp-recaptcha-service.js b/extensions/amp-recaptcha-input/0.1/amp-recaptcha-service.js
index cbf12d72ff33..a54101449471 100644
--- a/extensions/amp-recaptcha-input/0.1/amp-recaptcha-service.js
+++ b/extensions/amp-recaptcha-input/0.1/amp-recaptcha-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Service for recaptcha components
  * interacting with the 3p recaptcha bootstrap iframe
diff --git a/extensions/amp-recaptcha-input/0.1/test/test-amp-recaptcha-input.js b/extensions/amp-recaptcha-input/0.1/test/test-amp-recaptcha-input.js
index e96ce5dd4cf3..f8e1b2bc9564 100644
--- a/extensions/amp-recaptcha-input/0.1/test/test-amp-recaptcha-input.js
+++ b/extensions/amp-recaptcha-input/0.1/test/test-amp-recaptcha-input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-recaptcha-input';
 import {createElementWithAttributes} from '#core/dom';
 
diff --git a/extensions/amp-recaptcha-input/0.1/test/test-amp-recaptcha-service.js b/extensions/amp-recaptcha-input/0.1/test/test-amp-recaptcha-service.js
index e91728c75294..eec901b74161 100644
--- a/extensions/amp-recaptcha-input/0.1/test/test-amp-recaptcha-service.js
+++ b/extensions/amp-recaptcha-input/0.1/test/test-amp-recaptcha-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-recaptcha-input';
 import {AmpRecaptchaService} from '../amp-recaptcha-service';
 
diff --git a/extensions/amp-redbull-player/0.1/amp-redbull-player.js b/extensions/amp-redbull-player/0.1/amp-redbull-player.js
index 3e872e8bbb78..003934520e24 100644
--- a/extensions/amp-redbull-player/0.1/amp-redbull-player.js
+++ b/extensions/amp-redbull-player/0.1/amp-redbull-player.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {
   dispatchCustomEvent,
   getDataParamsFromAttributes,
diff --git a/extensions/amp-redbull-player/0.1/test/test-amp-redbull.js b/extensions/amp-redbull-player/0.1/test/test-amp-redbull.js
index 83962f581b15..9fd8df3eeb7e 100644
--- a/extensions/amp-redbull-player/0.1/test/test-amp-redbull.js
+++ b/extensions/amp-redbull-player/0.1/test/test-amp-redbull.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-redbull-player';
 
 describes.realWin(
diff --git a/extensions/amp-redbull-player/amp-redbull-player.md b/extensions/amp-redbull-player/amp-redbull-player.md
index d38728c9c5fd..db777e0f0966 100644
--- a/extensions/amp-redbull-player/amp-redbull-player.md
+++ b/extensions/amp-redbull-player/amp-redbull-player.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays a Red Bull Video Player.
 ---
 
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-redbull-player
 
 ## Example
diff --git a/extensions/amp-reddit/0.1/amp-reddit.js b/extensions/amp-reddit/0.1/amp-reddit.js
index 61c36930c0e6..15edcc9dcb78 100644
--- a/extensions/amp-reddit/0.1/amp-reddit.js
+++ b/extensions/amp-reddit/0.1/amp-reddit.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
 
 import {Services} from '#service';
diff --git a/extensions/amp-reddit/0.1/test/test-amp-reddit.js b/extensions/amp-reddit/0.1/test/test-amp-reddit.js
index 78d4e40acd95..9afcf6711f77 100644
--- a/extensions/amp-reddit/0.1/test/test-amp-reddit.js
+++ b/extensions/amp-reddit/0.1/test/test-amp-reddit.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-reddit';
 import {reddit} from '#3p/reddit';
 
diff --git a/extensions/amp-reddit/amp-reddit.md b/extensions/amp-reddit/amp-reddit.md
index b3ad20bedd83..583b3ccdfc3a 100644
--- a/extensions/amp-reddit/amp-reddit.md
+++ b/extensions/amp-reddit/amp-reddit.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays a Reddit comment or post embed.
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-reddit
 
 ## Examples
diff --git a/extensions/amp-render/1.0/amp-render.js b/extensions/amp-render/1.0/amp-render.js
index bb1fad92e924..64bdb2a7c753 100644
--- a/extensions/amp-render/1.0/amp-render.js
+++ b/extensions/amp-render/1.0/amp-render.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BaseElement} from './base-element';
 import {
   BatchFetchOptionsDef,
diff --git a/extensions/amp-render/1.0/base-element.js b/extensions/amp-render/1.0/base-element.js
index e4fa9ea77c60..ff600d52de18 100644
--- a/extensions/amp-render/1.0/base-element.js
+++ b/extensions/amp-render/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {PreactBaseElement} from '#preact/base-element';
 import {Render} from './component';
 
diff --git a/extensions/amp-render/1.0/component.js b/extensions/amp-render/1.0/component.js
index 4340adce3781..0d29a0fb3206 100644
--- a/extensions/amp-render/1.0/component.js
+++ b/extensions/amp-render/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {Wrapper, useRenderer} from '#preact/component';
 import {forwardRef} from '#preact/compat';
diff --git a/extensions/amp-render/1.0/component.type.js b/extensions/amp-render/1.0/component.type.js
index 61691ae86eb6..93a1053cc30b 100644
--- a/extensions/amp-render/1.0/component.type.js
+++ b/extensions/amp-render/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-render/1.0/storybook/Basic.amp.js b/extensions/amp-render/1.0/storybook/Basic.amp.js
index fc8d71e99e1a..768a7f19d2d9 100644
--- a/extensions/amp-render/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-render/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {text, withKnobs} from '@storybook/addon-knobs';
 import {withAmp} from '@ampproject/storybook-addon';
diff --git a/extensions/amp-render/1.0/storybook/Basic.js b/extensions/amp-render/1.0/storybook/Basic.js
index a3cb5dd174f9..76432b49f0b2 100644
--- a/extensions/amp-render/1.0/storybook/Basic.js
+++ b/extensions/amp-render/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {Render} from '../component';
 import {withKnobs} from '@storybook/addon-knobs';
diff --git a/extensions/amp-render/1.0/test/test-amp-render.js b/extensions/amp-render/1.0/test/test-amp-render.js
index f6dd31181747..f3463c31b6d3 100644
--- a/extensions/amp-render/1.0/test/test-amp-render.js
+++ b/extensions/amp-render/1.0/test/test-amp-render.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../../../amp-bind/0.1/amp-bind';
 import '../../../amp-mustache/0.2/amp-mustache';
 import '../../../amp-script/0.1/amp-script';
diff --git a/extensions/amp-render/1.0/test/test-component.js b/extensions/amp-render/1.0/test/test-component.js
index 203197af3378..78f97d768282 100644
--- a/extensions/amp-render/1.0/test/test-component.js
+++ b/extensions/amp-render/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {Render} from '../component';
 import {macroTask} from '#testing/helpers';
diff --git a/extensions/amp-resize-observer-polyfill/0.1/amp-resize-observer-polyfill.js b/extensions/amp-resize-observer-polyfill/0.1/amp-resize-observer-polyfill.js
index 6805d01194a2..cd0f230fdce4 100644
--- a/extensions/amp-resize-observer-polyfill/0.1/amp-resize-observer-polyfill.js
+++ b/extensions/amp-resize-observer-polyfill/0.1/amp-resize-observer-polyfill.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {upgradePolyfill} from '#polyfills/stubs/resize-observer-stub';
 
 import {registerServiceBuilder} from '../../../src/service-helpers';
diff --git a/extensions/amp-resize-observer-polyfill/0.1/test/test-amp-resize-observer-polyfill.js b/extensions/amp-resize-observer-polyfill/0.1/test/test-amp-resize-observer-polyfill.js
index 0c66e8767f8f..f9cb48e5cf06 100644
--- a/extensions/amp-resize-observer-polyfill/0.1/test/test-amp-resize-observer-polyfill.js
+++ b/extensions/amp-resize-observer-polyfill/0.1/test/test-amp-resize-observer-polyfill.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   ResizeObserverStub,
   installStub,
diff --git a/extensions/amp-riddle-quiz/0.1/amp-riddle-quiz.js b/extensions/amp-riddle-quiz/0.1/amp-riddle-quiz.js
index 9bfed8d639cd..4723842278e8 100644
--- a/extensions/amp-riddle-quiz/0.1/amp-riddle-quiz.js
+++ b/extensions/amp-riddle-quiz/0.1/amp-riddle-quiz.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {removeElement} from '#core/dom';
 import {applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
 import {isFiniteNumber, isObject} from '#core/types';
diff --git a/extensions/amp-riddle-quiz/0.1/test/test-amp-riddle-quiz.js b/extensions/amp-riddle-quiz/0.1/test/test-amp-riddle-quiz.js
index a35ef634890c..840d43d854f0 100644
--- a/extensions/amp-riddle-quiz/0.1/test/test-amp-riddle-quiz.js
+++ b/extensions/amp-riddle-quiz/0.1/test/test-amp-riddle-quiz.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {createElementWithAttributes} from '#core/dom';
 import '../amp-riddle-quiz';
 
diff --git a/extensions/amp-script/0.1/amp-script.css b/extensions/amp-script/0.1/amp-script.css
index fe4584df44da..baf86bec2347 100644
--- a/extensions/amp-script/0.1/amp-script.css
+++ b/extensions/amp-script/0.1/amp-script.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-script {
   opacity: 0.7;
diff --git a/extensions/amp-script/0.1/amp-script.js b/extensions/amp-script/0.1/amp-script.js
index 99eeac00d5c8..1033a13a2eda 100644
--- a/extensions/amp-script/0.1/amp-script.js
+++ b/extensions/amp-script/0.1/amp-script.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as WorkerDOM from '@ampproject/worker-dom/dist/amp-production/main.mjs';
 
 import {Deferred} from '#core/data-structures/promise';
diff --git a/extensions/amp-script/0.1/test-e2e/test-amp-script.js b/extensions/amp-script/0.1/test-e2e/test-amp-script.js
index 929cee953895..55e02379b30b 100644
--- a/extensions/amp-script/0.1/test-e2e/test-amp-script.js
+++ b/extensions/amp-script/0.1/test-e2e/test-amp-script.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-script e2e',
   {
diff --git a/extensions/amp-script/0.1/test/integration/test-amp-script.js b/extensions/amp-script/0.1/test/integration/test-amp-script.js
index 8db558e4979d..59f0a2793e71 100644
--- a/extensions/amp-script/0.1/test/integration/test-amp-script.js
+++ b/extensions/amp-script/0.1/test/integration/test-amp-script.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {poll as classicPoll} from '#testing/iframe';
 import {BrowserController} from '#testing/test-helper';
 
diff --git a/extensions/amp-script/0.1/test/unit/test-amp-script.js b/extensions/amp-script/0.1/test/unit/test-amp-script.js
index 9c9308e48bf6..c12417a26751 100644
--- a/extensions/amp-script/0.1/test/unit/test-amp-script.js
+++ b/extensions/amp-script/0.1/test/unit/test-amp-script.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as WorkerDOM from '@ampproject/worker-dom/dist/amp-production/main.mjs';
 
 import {Services} from '#service';
diff --git a/extensions/amp-script/0.1/test/unit/test-user-activation-tracker.js b/extensions/amp-script/0.1/test/unit/test-user-activation-tracker.js
index 901ff78f9ba7..280865b09680 100644
--- a/extensions/amp-script/0.1/test/unit/test-user-activation-tracker.js
+++ b/extensions/amp-script/0.1/test/unit/test-user-activation-tracker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {htmlFor} from '#core/dom/static-template';
 
 import {
diff --git a/extensions/amp-script/0.1/user-activation-tracker.js b/extensions/amp-script/0.1/user-activation-tracker.js
index 1f0b693fea82..c972d378349b 100644
--- a/extensions/amp-script/0.1/user-activation-tracker.js
+++ b/extensions/amp-script/0.1/user-activation-tracker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert} from '../../../src/log';
 
 export const ACTIVATION_TIMEOUT = 5000; // 5 seconds.
diff --git a/extensions/amp-script/amp-script.md b/extensions/amp-script/amp-script.md
index ef2fb8bf4d21..8559c4c48ace 100644
--- a/extensions/amp-script/amp-script.md
+++ b/extensions/amp-script/amp-script.md
@@ -6,22 +6,6 @@ teaser:
   text: Runs custom JavaScript in a Web Worker.
 ---
 
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 ## Usage
 
 The `amp-script` component allows you to run custom JavaScript. To maintain AMP's performance guarantees, your code runs in a Web Worker, and certain restrictions apply.
diff --git a/extensions/amp-selector/0.1/amp-selector.css b/extensions/amp-selector/0.1/amp-selector.css
index 6465f84cc53a..d57b413f4202 100644
--- a/extensions/amp-selector/0.1/amp-selector.css
+++ b/extensions/amp-selector/0.1/amp-selector.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-selector [option] {
   cursor: pointer;
diff --git a/extensions/amp-selector/0.1/amp-selector.js b/extensions/amp-selector/0.1/amp-selector.js
index 1296db66a6c3..8004d2a32975 100644
--- a/extensions/amp-selector/0.1/amp-selector.js
+++ b/extensions/amp-selector/0.1/amp-selector.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {AmpEvents} from '#core/constants/amp-events';
 import {Keys} from '#core/constants/key-codes';
diff --git a/extensions/amp-selector/0.1/amp-selector.md b/extensions/amp-selector/0.1/amp-selector.md
index 120e90d5784c..7ae6a4dc1dbd 100644
--- a/extensions/amp-selector/0.1/amp-selector.md
+++ b/extensions/amp-selector/0.1/amp-selector.md
@@ -7,22 +7,6 @@ teaser:
   text: Represents a control that presents a menu of options and lets the user choose from it.
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-selector
 
 ## Usage
diff --git a/extensions/amp-selector/0.1/test/test-amp-selector.js b/extensions/amp-selector/0.1/test/test-amp-selector.js
index 85ec3af2c871..2c3684e7dff4 100644
--- a/extensions/amp-selector/0.1/test/test-amp-selector.js
+++ b/extensions/amp-selector/0.1/test/test-amp-selector.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {AmpEvents} from '#core/constants/amp-events';
 import {Keys} from '#core/constants/key-codes';
diff --git a/extensions/amp-selector/1.0/amp-selector.css b/extensions/amp-selector/1.0/amp-selector.css
index b237dbe4e598..054fbe97f7c7 100644
--- a/extensions/amp-selector/1.0/amp-selector.css
+++ b/extensions/amp-selector/1.0/amp-selector.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * Pre-upgrade:
diff --git a/extensions/amp-selector/1.0/amp-selector.js b/extensions/amp-selector/1.0/amp-selector.js
index 7c430317bbed..aa1e59134715 100644
--- a/extensions/amp-selector/1.0/amp-selector.js
+++ b/extensions/amp-selector/1.0/amp-selector.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {dict} from '#core/types/object';
 import {toWin} from '#core/window';
diff --git a/extensions/amp-selector/1.0/base-element.js b/extensions/amp-selector/1.0/base-element.js
index 99a30a6b3ead..aeb8dedea194 100644
--- a/extensions/amp-selector/1.0/base-element.js
+++ b/extensions/amp-selector/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   createElementWithAttributes,
   toggleAttribute,
diff --git a/extensions/amp-selector/1.0/component.js b/extensions/amp-selector/1.0/component.js
index a6a140e0ee5e..bdccc91b0f84 100644
--- a/extensions/amp-selector/1.0/component.js
+++ b/extensions/amp-selector/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import objstr from 'obj-str';
 
 import {Keys} from '#core/constants/key-codes';
diff --git a/extensions/amp-selector/1.0/component.jss.js b/extensions/amp-selector/1.0/component.jss.js
index 9b438b37ab24..b779a3e5a2fc 100644
--- a/extensions/amp-selector/1.0/component.jss.js
+++ b/extensions/amp-selector/1.0/component.jss.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createUseStyles} from 'react-jss';
 
 const option = {
diff --git a/extensions/amp-selector/1.0/component.type.js b/extensions/amp-selector/1.0/component.type.js
index 496ba4f78b8e..9945c9864a68 100644
--- a/extensions/amp-selector/1.0/component.type.js
+++ b/extensions/amp-selector/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-selector/1.0/storybook/Basic.amp.js b/extensions/amp-selector/1.0/storybook/Basic.amp.js
index ba411cce8dbb..da5e61d69f4e 100644
--- a/extensions/amp-selector/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-selector/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {select, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-selector/1.0/storybook/Basic.js b/extensions/amp-selector/1.0/storybook/Basic.js
index be5815aed62c..81179a3ed0b0 100644
--- a/extensions/amp-selector/1.0/storybook/Basic.js
+++ b/extensions/amp-selector/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {select, withKnobs} from '@storybook/addon-knobs';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-selector/1.0/test/test-amp-selector.js b/extensions/amp-selector/1.0/test/test-amp-selector.js
index bb4fd4097ff0..a0107c866843 100644
--- a/extensions/amp-selector/1.0/test/test-amp-selector.js
+++ b/extensions/amp-selector/1.0/test/test-amp-selector.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import '../amp-selector';
 import {ActionTrust} from '#core/constants/action-constants';
 import {htmlFor} from '#core/dom/static-template';
diff --git a/extensions/amp-selector/1.0/test/test-component.js b/extensions/amp-selector/1.0/test/test-component.js
index 28f7597ba346..3da44f9bb704 100644
--- a/extensions/amp-selector/1.0/test/test-component.js
+++ b/extensions/amp-selector/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {mount} from 'enzyme';
 
 import {Keys} from '#core/constants/key-codes';
diff --git a/extensions/amp-selector/amp-selector.md b/extensions/amp-selector/amp-selector.md
index f69dc02e0397..26cbca7882f2 100644
--- a/extensions/amp-selector/amp-selector.md
+++ b/extensions/amp-selector/amp-selector.md
@@ -8,22 +8,6 @@ experimental: true
 bento: true
 ---
 
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-selector
 
 ## Usage
diff --git a/extensions/amp-selector/test-e2e/test-amp-selector-tabs.js b/extensions/amp-selector/test-e2e/test-amp-selector-tabs.js
index 0c6c1dd4ec61..b41d2df60478 100644
--- a/extensions/amp-selector/test-e2e/test-amp-selector-tabs.js
+++ b/extensions/amp-selector/test-e2e/test-amp-selector-tabs.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-selector',
   {
diff --git a/extensions/amp-shadow-dom-polyfill/0.1/amp-shadow-dom-polyfill.js b/extensions/amp-shadow-dom-polyfill/0.1/amp-shadow-dom-polyfill.js
index af885ea3fae4..27c059a3192a 100644
--- a/extensions/amp-shadow-dom-polyfill/0.1/amp-shadow-dom-polyfill.js
+++ b/extensions/amp-shadow-dom-polyfill/0.1/amp-shadow-dom-polyfill.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview This is just a placeholder for the polyfill that will be
  * injected here from the `node_modules/@webcomponents/webcomponentsjs/bundles/webcomponents-sd.install.js`
diff --git a/extensions/amp-sidebar/0.1/amp-sidebar.css b/extensions/amp-sidebar/0.1/amp-sidebar.css
index 97d1742f14ac..74af80c26149 100644
--- a/extensions/amp-sidebar/0.1/amp-sidebar.css
+++ b/extensions/amp-sidebar/0.1/amp-sidebar.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-sidebar {
   --story-page-vh: 1vh;
diff --git a/extensions/amp-sidebar/0.1/amp-sidebar.js b/extensions/amp-sidebar/0.1/amp-sidebar.js
index 813196a8faf7..0cd49f4179c3 100644
--- a/extensions/amp-sidebar/0.1/amp-sidebar.js
+++ b/extensions/amp-sidebar/0.1/amp-sidebar.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {AmpEvents} from '#core/constants/amp-events';
 import {CSS} from '../../../build/amp-sidebar-0.1.css';
diff --git a/extensions/amp-sidebar/0.1/amp-sidebar.md b/extensions/amp-sidebar/0.1/amp-sidebar.md
index 0658155fe795..7595a44cbc2f 100644
--- a/extensions/amp-sidebar/0.1/amp-sidebar.md
+++ b/extensions/amp-sidebar/0.1/amp-sidebar.md
@@ -7,22 +7,6 @@ teaser:
   text: Provides a way to display meta content intended for temporary access such as navigation, links, buttons, menus.
 ---
 
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-sidebar
 
 ## Usage
diff --git a/extensions/amp-sidebar/0.1/autoscroll.js b/extensions/amp-sidebar/0.1/autoscroll.js
index 893e6a59409e..51facfc33bcd 100644
--- a/extensions/amp-sidebar/0.1/autoscroll.js
+++ b/extensions/amp-sidebar/0.1/autoscroll.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {computedStyle} from '#core/dom/style';
 import {scopedQuerySelector} from '#core/dom/query';
diff --git a/extensions/amp-sidebar/0.1/storybook/Basic.amp.js b/extensions/amp-sidebar/0.1/storybook/Basic.amp.js
index 489cbe720b90..1a8d36417a16 100644
--- a/extensions/amp-sidebar/0.1/storybook/Basic.amp.js
+++ b/extensions/amp-sidebar/0.1/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // To do: how to add CSS
 //import '!style-loader!css-loader!./Basic-styles.css';
 import * as Preact from '#preact';
diff --git a/extensions/amp-sidebar/0.1/swipe-to-dismiss.js b/extensions/amp-sidebar/0.1/swipe-to-dismiss.js
index ffdbbc4f745e..4185e3e12c47 100644
--- a/extensions/amp-sidebar/0.1/swipe-to-dismiss.js
+++ b/extensions/amp-sidebar/0.1/swipe-to-dismiss.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {SwipeDef} from '../../../src/gesture-recognizers';
 import {delayAfterDeferringToEventLoop} from './utils';
 import {dev} from '../../../src/log';
diff --git a/extensions/amp-sidebar/0.1/test-e2e/test-amp-sidebar-toolbar.js b/extensions/amp-sidebar/0.1/test-e2e/test-amp-sidebar-toolbar.js
index 8888a51770eb..fbdf7ab95317 100644
--- a/extensions/amp-sidebar/0.1/test-e2e/test-amp-sidebar-toolbar.js
+++ b/extensions/amp-sidebar/0.1/test-e2e/test-amp-sidebar-toolbar.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-sidebar with toolbar',
   {
diff --git a/extensions/amp-sidebar/0.1/test-e2e/test-amp-sidebar.js b/extensions/amp-sidebar/0.1/test-e2e/test-amp-sidebar.js
index 78950b054947..9f3a6e1c5330 100644
--- a/extensions/amp-sidebar/0.1/test-e2e/test-amp-sidebar.js
+++ b/extensions/amp-sidebar/0.1/test-e2e/test-amp-sidebar.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Key} from '#testing/helpers/types';
 
 describes.endtoend(
diff --git a/extensions/amp-sidebar/0.1/test/integration/test-amp-sidebar.js b/extensions/amp-sidebar/0.1/test/integration/test-amp-sidebar.js
index 1ca14cf6736d..2251c9b8a814 100644
--- a/extensions/amp-sidebar/0.1/test/integration/test-amp-sidebar.js
+++ b/extensions/amp-sidebar/0.1/test/integration/test-amp-sidebar.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {poll} from '#testing/iframe';
 
 describes.sandboxed
diff --git a/extensions/amp-sidebar/0.1/test/test-amp-sidebar.js b/extensions/amp-sidebar/0.1/test/test-amp-sidebar.js
index d20f651e3a2c..f74227e9143e 100644
--- a/extensions/amp-sidebar/0.1/test/test-amp-sidebar.js
+++ b/extensions/amp-sidebar/0.1/test/test-amp-sidebar.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-sidebar';
 import * as fakeTimers from '@sinonjs/fake-timers';
 import {ActionService} from '#service/action-impl';
diff --git a/extensions/amp-sidebar/0.1/test/test-toolbar.js b/extensions/amp-sidebar/0.1/test/test-toolbar.js
index 56e049197182..5d76acc83338 100644
--- a/extensions/amp-sidebar/0.1/test/test-toolbar.js
+++ b/extensions/amp-sidebar/0.1/test/test-toolbar.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpDocSingle} from '#service/ampdoc-impl';
 import {Services} from '#service';
 import {Toolbar} from '../toolbar';
diff --git a/extensions/amp-sidebar/0.1/toolbar.js b/extensions/amp-sidebar/0.1/toolbar.js
index 37b14bcd2445..4672f855e5f1 100644
--- a/extensions/amp-sidebar/0.1/toolbar.js
+++ b/extensions/amp-sidebar/0.1/toolbar.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dev, user, userAssert} from '../../../src/log';
 import {handleAutoscroll} from './autoscroll';
 import {toggle} from '#core/dom/style';
diff --git a/extensions/amp-sidebar/0.1/utils.js b/extensions/amp-sidebar/0.1/utils.js
index a2923e194f3b..03666dd63314 100644
--- a/extensions/amp-sidebar/0.1/utils.js
+++ b/extensions/amp-sidebar/0.1/utils.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 /**
  * @fileoverview Description of this file.
  */
diff --git a/extensions/amp-sidebar/0.2/amp-sidebar.css b/extensions/amp-sidebar/0.2/amp-sidebar.css
index 135c50df13b4..1897a40952bb 100644
--- a/extensions/amp-sidebar/0.2/amp-sidebar.css
+++ b/extensions/amp-sidebar/0.2/amp-sidebar.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-sidebar {
   --story-page-vh: 1vh;
diff --git a/extensions/amp-sidebar/0.2/amp-sidebar.js b/extensions/amp-sidebar/0.2/amp-sidebar.js
index 7ff2bac8c525..b331bd3d3aee 100644
--- a/extensions/amp-sidebar/0.2/amp-sidebar.js
+++ b/extensions/amp-sidebar/0.2/amp-sidebar.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {AmpEvents} from '#core/constants/amp-events';
 import {CSS} from '../../../build/amp-sidebar-0.2.css';
diff --git a/extensions/amp-sidebar/0.2/amp-sidebar.md.draft b/extensions/amp-sidebar/0.2/amp-sidebar.md.draft
index f80594c825cb..f0a6cf1e4921 100644
--- a/extensions/amp-sidebar/0.2/amp-sidebar.md.draft
+++ b/extensions/amp-sidebar/0.2/amp-sidebar.md.draft
@@ -10,21 +10,7 @@ teaser:
 experimental: true
 ---
 
-<!---
-Copyright 2017 The AMP HTML Authors. All Rights Reserved.
 
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
 
 # <a name="amp-sidebar"></a> `amp-sidebar`
 
diff --git a/extensions/amp-sidebar/0.2/autoscroll.js b/extensions/amp-sidebar/0.2/autoscroll.js
index 893e6a59409e..51facfc33bcd 100644
--- a/extensions/amp-sidebar/0.2/autoscroll.js
+++ b/extensions/amp-sidebar/0.2/autoscroll.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {computedStyle} from '#core/dom/style';
 import {scopedQuerySelector} from '#core/dom/query';
diff --git a/extensions/amp-sidebar/0.2/swipe-to-dismiss.js b/extensions/amp-sidebar/0.2/swipe-to-dismiss.js
index ffdbbc4f745e..4185e3e12c47 100644
--- a/extensions/amp-sidebar/0.2/swipe-to-dismiss.js
+++ b/extensions/amp-sidebar/0.2/swipe-to-dismiss.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {SwipeDef} from '../../../src/gesture-recognizers';
 import {delayAfterDeferringToEventLoop} from './utils';
 import {dev} from '../../../src/log';
diff --git a/extensions/amp-sidebar/0.2/test-e2e/test-amp-sidebar.js b/extensions/amp-sidebar/0.2/test-e2e/test-amp-sidebar.js
index 724427dde86d..e5b71bf16ceb 100644
--- a/extensions/amp-sidebar/0.2/test-e2e/test-amp-sidebar.js
+++ b/extensions/amp-sidebar/0.2/test-e2e/test-amp-sidebar.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Key} from '#testing/helpers/types';
 
 describes.endtoend(
diff --git a/extensions/amp-sidebar/0.2/test/integration/test-amp-sidebar.js b/extensions/amp-sidebar/0.2/test/integration/test-amp-sidebar.js
index 1ca14cf6736d..2251c9b8a814 100644
--- a/extensions/amp-sidebar/0.2/test/integration/test-amp-sidebar.js
+++ b/extensions/amp-sidebar/0.2/test/integration/test-amp-sidebar.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {poll} from '#testing/iframe';
 
 describes.sandboxed
diff --git a/extensions/amp-sidebar/0.2/test/test-amp-sidebar.js b/extensions/amp-sidebar/0.2/test/test-amp-sidebar.js
index 17828ea0aea6..79ffa11c3b0d 100644
--- a/extensions/amp-sidebar/0.2/test/test-amp-sidebar.js
+++ b/extensions/amp-sidebar/0.2/test/test-amp-sidebar.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-sidebar';
 import * as fakeTimers from '@sinonjs/fake-timers';
 import {ActionTrust} from '#core/constants/action-constants';
diff --git a/extensions/amp-sidebar/0.2/test/test-toolbar.js b/extensions/amp-sidebar/0.2/test/test-toolbar.js
index ea1a8a0e113b..58e8d2b637d9 100644
--- a/extensions/amp-sidebar/0.2/test/test-toolbar.js
+++ b/extensions/amp-sidebar/0.2/test/test-toolbar.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpDocSingle} from '#service/ampdoc-impl';
 import {Services} from '#service';
 import {Toolbar} from '../toolbar';
diff --git a/extensions/amp-sidebar/0.2/toolbar.js b/extensions/amp-sidebar/0.2/toolbar.js
index c07edc2f2105..628b2f64816b 100644
--- a/extensions/amp-sidebar/0.2/toolbar.js
+++ b/extensions/amp-sidebar/0.2/toolbar.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dev, user, userAssert} from '../../../src/log';
 import {handleAutoscroll} from './autoscroll';
 import {toggle} from '#core/dom/style';
diff --git a/extensions/amp-sidebar/0.2/utils.js b/extensions/amp-sidebar/0.2/utils.js
index a2923e194f3b..03666dd63314 100644
--- a/extensions/amp-sidebar/0.2/utils.js
+++ b/extensions/amp-sidebar/0.2/utils.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 /**
  * @fileoverview Description of this file.
  */
diff --git a/extensions/amp-sidebar/1.0/amp-sidebar.css b/extensions/amp-sidebar/1.0/amp-sidebar.css
index 16000ab64c0d..18618bf72f3d 100644
--- a/extensions/amp-sidebar/1.0/amp-sidebar.css
+++ b/extensions/amp-sidebar/1.0/amp-sidebar.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /* Pre-upgrade: not displayed */
 amp-sidebar[hidden] {
diff --git a/extensions/amp-sidebar/1.0/amp-sidebar.js b/extensions/amp-sidebar/1.0/amp-sidebar.js
index 73e97350391a..f80c1511902d 100644
--- a/extensions/amp-sidebar/1.0/amp-sidebar.js
+++ b/extensions/amp-sidebar/1.0/amp-sidebar.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BaseElement} from './base-element';
 import {CSS} from '../../../build/amp-sidebar-1.0.css';
 import {isExperimentOn} from '#experiments';
diff --git a/extensions/amp-sidebar/1.0/base-element.js b/extensions/amp-sidebar/1.0/base-element.js
index 094bfd05f128..7ee787669191 100644
--- a/extensions/amp-sidebar/1.0/base-element.js
+++ b/extensions/amp-sidebar/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {CSS as COMPONENT_CSS} from './component.jss';
 import {PreactBaseElement} from '#preact/base-element';
diff --git a/extensions/amp-sidebar/1.0/component.js b/extensions/amp-sidebar/1.0/component.js
index d4240b587342..5cb46b3dcaea 100644
--- a/extensions/amp-sidebar/1.0/component.js
+++ b/extensions/amp-sidebar/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {ContainWrapper, useValueRef} from '#preact/component';
 import {Keys} from '#core/constants/key-codes';
diff --git a/extensions/amp-sidebar/1.0/component.jss.js b/extensions/amp-sidebar/1.0/component.jss.js
index a863ea69d766..ae5e0f8ce71c 100644
--- a/extensions/amp-sidebar/1.0/component.jss.js
+++ b/extensions/amp-sidebar/1.0/component.jss.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createUseStyles} from 'react-jss';
 
 const sidebar = {
diff --git a/extensions/amp-sidebar/1.0/component.type.js b/extensions/amp-sidebar/1.0/component.type.js
index 2a0c8358f062..948cc9ada4be 100644
--- a/extensions/amp-sidebar/1.0/component.type.js
+++ b/extensions/amp-sidebar/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-sidebar/1.0/sidebar-animations-hook.js b/extensions/amp-sidebar/1.0/sidebar-animations-hook.js
index 97061ce4cc49..c036a843c9a7 100644
--- a/extensions/amp-sidebar/1.0/sidebar-animations-hook.js
+++ b/extensions/amp-sidebar/1.0/sidebar-animations-hook.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Side} from './sidebar-config';
 import {assertDoesNotContainDisplay, setStyles} from '#core/dom/style';
 import {useLayoutEffect, useRef} from '#preact';
diff --git a/extensions/amp-sidebar/1.0/sidebar-config.js b/extensions/amp-sidebar/1.0/sidebar-config.js
index cf68ac15d080..8d15c156e2fa 100644
--- a/extensions/amp-sidebar/1.0/sidebar-config.js
+++ b/extensions/amp-sidebar/1.0/sidebar-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @protected @enum {string} */
 export const Side = {
   LEFT: 'left',
diff --git a/extensions/amp-sidebar/1.0/sidebar-toolbar-hook.js b/extensions/amp-sidebar/1.0/sidebar-toolbar-hook.js
index d3416e94a499..3071d329f2ff 100644
--- a/extensions/amp-sidebar/1.0/sidebar-toolbar-hook.js
+++ b/extensions/amp-sidebar/1.0/sidebar-toolbar-hook.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {escapeCssSelectorIdent} from '#core/dom/css-selectors';
 import {useEffect, useState} from '#preact';
 
diff --git a/extensions/amp-sidebar/1.0/storybook/Basic.amp.js b/extensions/amp-sidebar/1.0/storybook/Basic.amp.js
index b740d4cb0539..46f9cc5a98c8 100644
--- a/extensions/amp-sidebar/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-sidebar/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {
   boolean,
diff --git a/extensions/amp-sidebar/1.0/storybook/Basic.js b/extensions/amp-sidebar/1.0/storybook/Basic.js
index d1d8b1d6864b..5bb8d54b3585 100644
--- a/extensions/amp-sidebar/1.0/storybook/Basic.js
+++ b/extensions/amp-sidebar/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {Sidebar, SidebarToolbar} from '../component';
 import {boolean, color, select, text, withKnobs} from '@storybook/addon-knobs';
diff --git a/extensions/amp-sidebar/1.0/test-e2e/test-amp-sidebar.js b/extensions/amp-sidebar/1.0/test-e2e/test-amp-sidebar.js
index 0a9dec32c1cb..4598d6d51ac3 100644
--- a/extensions/amp-sidebar/1.0/test-e2e/test-amp-sidebar.js
+++ b/extensions/amp-sidebar/1.0/test-e2e/test-amp-sidebar.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 //
 import {Key} from '#testing/helpers/types';
 
diff --git a/extensions/amp-sidebar/1.0/test/test-amp-sidebar.js b/extensions/amp-sidebar/1.0/test/test-amp-sidebar.js
index 85aedab8a91a..d8946ca8b949 100644
--- a/extensions/amp-sidebar/1.0/test/test-amp-sidebar.js
+++ b/extensions/amp-sidebar/1.0/test/test-amp-sidebar.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import '../amp-sidebar';
 import {ActionInvocation} from '#service/action-impl';
 import {ActionTrust} from '#core/constants/action-constants';
diff --git a/extensions/amp-sidebar/1.0/test/test-component.js b/extensions/amp-sidebar/1.0/test/test-component.js
index 9464c54d8176..e50646b2a9bb 100644
--- a/extensions/amp-sidebar/1.0/test/test-component.js
+++ b/extensions/amp-sidebar/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {Sidebar, SidebarToolbar} from '../component';
 import {htmlFor} from '#core/dom/static-template';
diff --git a/extensions/amp-skimlinks/0.1/affiliate-link-resolver.js b/extensions/amp-skimlinks/0.1/affiliate-link-resolver.js
index b09f88a2193a..701ef2cdf257 100644
--- a/extensions/amp-skimlinks/0.1/affiliate-link-resolver.js
+++ b/extensions/amp-skimlinks/0.1/affiliate-link-resolver.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {TwoStepsResponse} from './link-rewriter/two-steps-response';
diff --git a/extensions/amp-skimlinks/0.1/amp-skimlinks.js b/extensions/amp-skimlinks/0.1/amp-skimlinks.js
index 38232ec70b6d..b09f7e264ce6 100644
--- a/extensions/amp-skimlinks/0.1/amp-skimlinks.js
+++ b/extensions/amp-skimlinks/0.1/amp-skimlinks.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CommonSignals} from '#core/constants/common-signals';
 import {once} from '#core/types/function';
 
diff --git a/extensions/amp-skimlinks/0.1/constants.js b/extensions/amp-skimlinks/0.1/constants.js
index 495ea871723b..79e2c98364e0 100644
--- a/extensions/amp-skimlinks/0.1/constants.js
+++ b/extensions/amp-skimlinks/0.1/constants.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 export const AMP_SKIMLINKS_VERSION = '1.0.3';
 export const XCUST_ATTRIBUTE_NAME = 'data-skimlinks-custom-tracking-id';
 export const WAYPOINT_BASE_URL = 'https://go.skimresources.com';
diff --git a/extensions/amp-skimlinks/0.1/link-rewriter/constants.js b/extensions/amp-skimlinks/0.1/link-rewriter/constants.js
index 977dd39f8187..358cf6ef660e 100644
--- a/extensions/amp-skimlinks/0.1/link-rewriter/constants.js
+++ b/extensions/amp-skimlinks/0.1/link-rewriter/constants.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 export const EVENTS = {
   PAGE_SCANNED: 'PAGE_SCANNED',
   CLICK: 'CLICK',
diff --git a/extensions/amp-skimlinks/0.1/link-rewriter/link-replacement-cache.js b/extensions/amp-skimlinks/0.1/link-rewriter/link-replacement-cache.js
index d64cb858a8c7..38f2858f3813 100644
--- a/extensions/amp-skimlinks/0.1/link-rewriter/link-replacement-cache.js
+++ b/extensions/amp-skimlinks/0.1/link-rewriter/link-replacement-cache.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Stores a list of anchors and their associated replacement URL.
  * This class could easily be replaced by a Map but Map is not allowed
diff --git a/extensions/amp-skimlinks/0.1/link-rewriter/link-rewriter-manager.js b/extensions/amp-skimlinks/0.1/link-rewriter/link-rewriter-manager.js
index 09d8f69a7c30..2317bfa20b60 100644
--- a/extensions/amp-skimlinks/0.1/link-rewriter/link-rewriter-manager.js
+++ b/extensions/amp-skimlinks/0.1/link-rewriter/link-rewriter-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 
 import {Services} from '#service';
diff --git a/extensions/amp-skimlinks/0.1/link-rewriter/link-rewriter.js b/extensions/amp-skimlinks/0.1/link-rewriter/link-rewriter.js
index db4fc1dc8064..56005e6a0faa 100644
--- a/extensions/amp-skimlinks/0.1/link-rewriter/link-rewriter.js
+++ b/extensions/amp-skimlinks/0.1/link-rewriter/link-rewriter.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Observable} from '#core/data-structures/observable';
 
 import {EVENTS, ORIGINAL_URL_ATTRIBUTE} from './constants';
diff --git a/extensions/amp-skimlinks/0.1/link-rewriter/two-steps-response.js b/extensions/amp-skimlinks/0.1/link-rewriter/two-steps-response.js
index b6bf61b2efa2..9e8193888550 100644
--- a/extensions/amp-skimlinks/0.1/link-rewriter/two-steps-response.js
+++ b/extensions/amp-skimlinks/0.1/link-rewriter/two-steps-response.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Create an object containing an synchronous and an asynchronous response.
  * LinkRewriter expect 'resolveUnknownAnchors()' to return an
diff --git a/extensions/amp-skimlinks/0.1/skim-options.js b/extensions/amp-skimlinks/0.1/skim-options.js
index 43906f3d27c5..cf8167c0aac8 100644
--- a/extensions/amp-skimlinks/0.1/skim-options.js
+++ b/extensions/amp-skimlinks/0.1/skim-options.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getChildJsonConfig} from '#core/dom';
 
 import {
diff --git a/extensions/amp-skimlinks/0.1/test/constants.js b/extensions/amp-skimlinks/0.1/test/constants.js
index e5082e64ac20..5481a39b215d 100644
--- a/extensions/amp-skimlinks/0.1/test/constants.js
+++ b/extensions/amp-skimlinks/0.1/test/constants.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {DEFAULT_CONFIG, WAYPOINT_BASE_URL} from '../constants';
 
 export const pubcode = 'pubXcode';
diff --git a/extensions/amp-skimlinks/0.1/test/helpers.js b/extensions/amp-skimlinks/0.1/test/helpers.js
index 4c34bd69ac21..b392c516fcfe 100644
--- a/extensions/amp-skimlinks/0.1/test/helpers.js
+++ b/extensions/amp-skimlinks/0.1/test/helpers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {DEFAULT_SKIM_OPTIONS} from './constants';
diff --git a/extensions/amp-skimlinks/0.1/test/test-affiliate-link-resolver.js b/extensions/amp-skimlinks/0.1/test/test-affiliate-link-resolver.js
index 4efbf5db1dbd..cf75e6113a28 100644
--- a/extensions/amp-skimlinks/0.1/test/test-affiliate-link-resolver.js
+++ b/extensions/amp-skimlinks/0.1/test/test-affiliate-link-resolver.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {DEFAULT_SKIM_OPTIONS, pubcode} from './constants';
diff --git a/extensions/amp-skimlinks/0.1/test/test-amp-skimlinks.js b/extensions/amp-skimlinks/0.1/test/test-amp-skimlinks.js
index be582266ae6d..2d7b2b7adb06 100644
--- a/extensions/amp-skimlinks/0.1/test/test-amp-skimlinks.js
+++ b/extensions/amp-skimlinks/0.1/test/test-amp-skimlinks.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import * as DocumentReady from '#core/document-ready';
 
diff --git a/extensions/amp-skimlinks/0.1/test/test-link-rewriter.js b/extensions/amp-skimlinks/0.1/test/test-link-rewriter.js
index e2b00ee216f8..8953e771bc2b 100644
--- a/extensions/amp-skimlinks/0.1/test/test-link-rewriter.js
+++ b/extensions/amp-skimlinks/0.1/test/test-link-rewriter.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 
 import * as chunkModule from '../../../../src/chunk';
diff --git a/extensions/amp-skimlinks/0.1/test/test-skim-options.js b/extensions/amp-skimlinks/0.1/test/test-skim-options.js
index 051effe881d8..2309278da64b 100644
--- a/extensions/amp-skimlinks/0.1/test/test-skim-options.js
+++ b/extensions/amp-skimlinks/0.1/test/test-skim-options.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import helpersFactory from './helpers';
 
 import {WAYPOINT_BASE_URL} from '../constants';
diff --git a/extensions/amp-skimlinks/0.1/test/test-tracking.js b/extensions/amp-skimlinks/0.1/test/test-tracking.js
index cd8ef1d597ca..d29b1248f16b 100644
--- a/extensions/amp-skimlinks/0.1/test/test-tracking.js
+++ b/extensions/amp-skimlinks/0.1/test/test-tracking.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {pubcode} from './constants';
 import helpersFactory from './helpers';
 
diff --git a/extensions/amp-skimlinks/0.1/test/test-waypoint.js b/extensions/amp-skimlinks/0.1/test/test-waypoint.js
index 92f899ed8bbc..8786db8cf9d3 100644
--- a/extensions/amp-skimlinks/0.1/test/test-waypoint.js
+++ b/extensions/amp-skimlinks/0.1/test/test-waypoint.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseQueryString} from '#core/types/string/url';
 
 import {DEFAULT_SKIM_OPTIONS, pubcode} from './constants';
diff --git a/extensions/amp-skimlinks/0.1/tracking.js b/extensions/amp-skimlinks/0.1/tracking.js
index cc4d4ab7af0c..fa4cd333fc75 100644
--- a/extensions/amp-skimlinks/0.1/tracking.js
+++ b/extensions/amp-skimlinks/0.1/tracking.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {PLATFORM_NAME, XCUST_ATTRIBUTE_NAME} from './constants';
diff --git a/extensions/amp-skimlinks/0.1/utils.js b/extensions/amp-skimlinks/0.1/utils.js
index c8decfd71bf0..ff8cbd2e41a5 100644
--- a/extensions/amp-skimlinks/0.1/utils.js
+++ b/extensions/amp-skimlinks/0.1/utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseUrlDeprecated} from '../../../src/url';
 
 /**
diff --git a/extensions/amp-skimlinks/0.1/waypoint.js b/extensions/amp-skimlinks/0.1/waypoint.js
index 02353cf20ecc..b0c04af5ef04 100644
--- a/extensions/amp-skimlinks/0.1/waypoint.js
+++ b/extensions/amp-skimlinks/0.1/waypoint.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {Services} from '#service';
diff --git a/extensions/amp-skimlinks/amp-skimlinks.md b/extensions/amp-skimlinks/amp-skimlinks.md
index e124ab38926c..80e2a3c814dd 100644
--- a/extensions/amp-skimlinks/amp-skimlinks.md
+++ b/extensions/amp-skimlinks/amp-skimlinks.md
@@ -6,22 +6,6 @@ teaser:
   text: Run skimlinks inside your AMP page.
 ---
 
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-skimlinks
 
 ## Overview
diff --git a/extensions/amp-slides/0.1/amp-slides.js b/extensions/amp-slides/0.1/amp-slides.js
index af0660df3da2..06f522f0478b 100644
--- a/extensions/amp-slides/0.1/amp-slides.js
+++ b/extensions/amp-slides/0.1/amp-slides.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {user} from '../../../src/log';
 
 /** @private @const {string} */
diff --git a/extensions/amp-slides/amp-slides-deprecated.md b/extensions/amp-slides/amp-slides-deprecated.md
index b8567e3e9d5f..c99dfe7e2da1 100644
--- a/extensions/amp-slides/amp-slides-deprecated.md
+++ b/extensions/amp-slides/amp-slides-deprecated.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-slides
 
 WARNING: `amp-slides` is no longer available. Please see [`amp-carousel`](../amp-carousel/amp-carousel.md) with the `type="slides"` attribute for an alternative.
diff --git a/extensions/amp-smartlinks/0.1/amp-smartlinks.js b/extensions/amp-smartlinks/0.1/amp-smartlinks.js
index 014440091014..665d8428d0a1 100644
--- a/extensions/amp-smartlinks/0.1/amp-smartlinks.js
+++ b/extensions/amp-smartlinks/0.1/amp-smartlinks.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CommonSignals} from '#core/constants/common-signals';
 import {dict} from '#core/types/object';
 
diff --git a/extensions/amp-smartlinks/0.1/constants.js b/extensions/amp-smartlinks/0.1/constants.js
index b5a10c851992..1b95ef8999d7 100644
--- a/extensions/amp-smartlinks/0.1/constants.js
+++ b/extensions/amp-smartlinks/0.1/constants.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const BASE_API_URL = 'https://api.narrativ.com/api';
 /** @const @enum {string} */
 export const ENDPOINTS = {
diff --git a/extensions/amp-smartlinks/0.1/linkmate-options.js b/extensions/amp-smartlinks/0.1/linkmate-options.js
index 3958869dbe4c..a1e7fec48136 100644
--- a/extensions/amp-smartlinks/0.1/linkmate-options.js
+++ b/extensions/amp-smartlinks/0.1/linkmate-options.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Get the config values from the tag on the amp page
  * @param {!Element} element
diff --git a/extensions/amp-smartlinks/0.1/linkmate.js b/extensions/amp-smartlinks/0.1/linkmate.js
index 1c22e61dfdff..28bd5571266e 100644
--- a/extensions/amp-smartlinks/0.1/linkmate.js
+++ b/extensions/amp-smartlinks/0.1/linkmate.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 import {deepEquals} from '#core/types/object/json';
 
diff --git a/extensions/amp-smartlinks/0.1/test/test-amp-smartlinks.js b/extensions/amp-smartlinks/0.1/test/test-amp-smartlinks.js
index 4b22bc1a01dc..8c999f75e67f 100644
--- a/extensions/amp-smartlinks/0.1/test/test-amp-smartlinks.js
+++ b/extensions/amp-smartlinks/0.1/test/test-amp-smartlinks.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as DocumentReady from '#core/document-ready';
 
 import {Services} from '#service';
diff --git a/extensions/amp-smartlinks/0.1/test/test-linkmate.js b/extensions/amp-smartlinks/0.1/test/test-linkmate.js
index 2e8b955ac03c..19a2a6ebdf84 100644
--- a/extensions/amp-smartlinks/0.1/test/test-linkmate.js
+++ b/extensions/amp-smartlinks/0.1/test/test-linkmate.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as DocumentReady from '#core/document-ready';
 
 import {Services} from '#service';
diff --git a/extensions/amp-smartlinks/amp-smartlinks.md b/extensions/amp-smartlinks/amp-smartlinks.md
index 8838960d53ed..b97c26ddbac1 100644
--- a/extensions/amp-smartlinks/amp-smartlinks.md
+++ b/extensions/amp-smartlinks/amp-smartlinks.md
@@ -7,22 +7,6 @@ teaser:
   text: Run Narrativ's Linkmate process inside your AMP page
 ---
 
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-smartlinks
 
 ## Overview
diff --git a/extensions/amp-social-share/0.1/amp-social-share-config.js b/extensions/amp-social-share/0.1/amp-social-share-config.js
index 507f33a2d143..c99f88c7c3f5 100644
--- a/extensions/amp-social-share/0.1/amp-social-share-config.js
+++ b/extensions/amp-social-share/0.1/amp-social-share-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 /**
diff --git a/extensions/amp-social-share/0.1/amp-social-share.css b/extensions/amp-social-share/0.1/amp-social-share.css
index bf27e1c8d51b..e7afde5d3a84 100644
--- a/extensions/amp-social-share/0.1/amp-social-share.css
+++ b/extensions/amp-social-share/0.1/amp-social-share.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import '../../../third_party/optimized-svg-icons/amp-social-share-svgs.css';
 
diff --git a/extensions/amp-social-share/0.1/amp-social-share.js b/extensions/amp-social-share/0.1/amp-social-share.js
index fd4c16b5e231..9e86de0520ce 100644
--- a/extensions/amp-social-share/0.1/amp-social-share.js
+++ b/extensions/amp-social-share/0.1/amp-social-share.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Keys} from '#core/constants/key-codes';
 import {getDataParamsFromAttributes} from '#core/dom';
 import {toggle} from '#core/dom/style';
diff --git a/extensions/amp-social-share/0.1/amp-social-share.md b/extensions/amp-social-share/0.1/amp-social-share.md
index 2ddc58ca3964..a514f30a2597 100644
--- a/extensions/amp-social-share/0.1/amp-social-share.md
+++ b/extensions/amp-social-share/0.1/amp-social-share.md
@@ -4,22 +4,6 @@ formats:
   - websites
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-social-share
 
 ## Usage
diff --git a/extensions/amp-social-share/0.1/storybook/Basic.amp.js b/extensions/amp-social-share/0.1/storybook/Basic.amp.js
index 5a8417c7082e..86b5f765d8b5 100644
--- a/extensions/amp-social-share/0.1/storybook/Basic.amp.js
+++ b/extensions/amp-social-share/0.1/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {select, text, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-social-share/1.0/amp-social-share.css b/extensions/amp-social-share/1.0/amp-social-share.css
index 8f217c68cd8a..9418b3e43081 100644
--- a/extensions/amp-social-share/1.0/amp-social-share.css
+++ b/extensions/amp-social-share/1.0/amp-social-share.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * Pre-upgrade:
diff --git a/extensions/amp-social-share/1.0/amp-social-share.js b/extensions/amp-social-share/1.0/amp-social-share.js
index 132160553c82..84dc128a1003 100644
--- a/extensions/amp-social-share/1.0/amp-social-share.js
+++ b/extensions/amp-social-share/1.0/amp-social-share.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getDataParamsFromAttributes} from '#core/dom';
 import {Layout} from '#core/dom/layout';
 import {toggle} from '#core/dom/style';
diff --git a/extensions/amp-social-share/1.0/base-element.js b/extensions/amp-social-share/1.0/base-element.js
index 9c47e699e8ac..c65ffdfd5ed1 100644
--- a/extensions/amp-social-share/1.0/base-element.js
+++ b/extensions/amp-social-share/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {PreactBaseElement} from '#preact/base-element';
 
 import {SocialShare} from './component';
diff --git a/extensions/amp-social-share/1.0/component.js b/extensions/amp-social-share/1.0/component.js
index d73e2541b1e4..d466ed572b67 100644
--- a/extensions/amp-social-share/1.0/component.js
+++ b/extensions/amp-social-share/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Keys} from '#core/constants/key-codes';
 import {dict} from '#core/types/object';
 import {parseQueryString} from '#core/types/string/url';
diff --git a/extensions/amp-social-share/1.0/component.jss.js b/extensions/amp-social-share/1.0/component.jss.js
index 7ce69d46fc6f..fa2c6b3aa793 100644
--- a/extensions/amp-social-share/1.0/component.jss.js
+++ b/extensions/amp-social-share/1.0/component.jss.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createUseStyles} from 'react-jss';
 
 const button = {
diff --git a/extensions/amp-social-share/1.0/component.type.js b/extensions/amp-social-share/1.0/component.type.js
index 66ff69a4fc8a..c716a8cba914 100644
--- a/extensions/amp-social-share/1.0/component.type.js
+++ b/extensions/amp-social-share/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-social-share/1.0/social-share-config.js b/extensions/amp-social-share/1.0/social-share-config.js
index 8026f4811d70..18f0c9c11bf0 100644
--- a/extensions/amp-social-share/1.0/social-share-config.js
+++ b/extensions/amp-social-share/1.0/social-share-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 /**
diff --git a/extensions/amp-social-share/1.0/social-share-svgs.js b/extensions/amp-social-share/1.0/social-share-svgs.js
index 5b811818787d..3997b50232fb 100644
--- a/extensions/amp-social-share/1.0/social-share-svgs.js
+++ b/extensions/amp-social-share/1.0/social-share-svgs.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import * as Preact from '#preact';
 
 /**
diff --git a/extensions/amp-social-share/1.0/storybook/Basic.amp.js b/extensions/amp-social-share/1.0/storybook/Basic.amp.js
index d1458823a59b..df9917ec8b40 100644
--- a/extensions/amp-social-share/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-social-share/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {select, text, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-social-share/1.0/storybook/Basic.js b/extensions/amp-social-share/1.0/storybook/Basic.js
index 5c04d30e0dfc..11c51fb8e2b0 100644
--- a/extensions/amp-social-share/1.0/storybook/Basic.js
+++ b/extensions/amp-social-share/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {color, object, select, text, withKnobs} from '@storybook/addon-knobs';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-social-share/1.0/test-e2e/test-amp-social-share.js b/extensions/amp-social-share/1.0/test-e2e/test-amp-social-share.js
index 8a147cc01880..232581c56535 100644
--- a/extensions/amp-social-share/1.0/test-e2e/test-amp-social-share.js
+++ b/extensions/amp-social-share/1.0/test-e2e/test-amp-social-share.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Key} from '#testing/helpers/types';
 
 describes.endtoend(
diff --git a/extensions/amp-social-share/1.0/test/test-amp-social-share.js b/extensions/amp-social-share/1.0/test/test-amp-social-share.js
index 4496a2b9744d..8cb485b07b9c 100644
--- a/extensions/amp-social-share/1.0/test/test-amp-social-share.js
+++ b/extensions/amp-social-share/1.0/test/test-amp-social-share.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-social-share';
 import {waitForChildPromise} from '#core/dom';
 
diff --git a/extensions/amp-social-share/1.0/test/test-component.js b/extensions/amp-social-share/1.0/test/test-component.js
index 9feb4838a6df..9e113cd6cd8e 100644
--- a/extensions/amp-social-share/1.0/test/test-component.js
+++ b/extensions/amp-social-share/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {mount} from 'enzyme';
 
 import {dict} from '#core/types/object';
diff --git a/extensions/amp-social-share/amp-social-share.md b/extensions/amp-social-share/amp-social-share.md
index ac43a1061a71..f09af70dbd7f 100644
--- a/extensions/amp-social-share/amp-social-share.md
+++ b/extensions/amp-social-share/amp-social-share.md
@@ -6,22 +6,6 @@ experimental: true
 bento: true
 ---
 
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-social-share
 
 ## Usage
diff --git a/extensions/amp-soundcloud/0.1/amp-soundcloud.js b/extensions/amp-soundcloud/0.1/amp-soundcloud.js
index 5c7b8498cde3..64d804dbe2e9 100644
--- a/extensions/amp-soundcloud/0.1/amp-soundcloud.js
+++ b/extensions/amp-soundcloud/0.1/amp-soundcloud.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Embeds a Soundcloud clip
  *
diff --git a/extensions/amp-soundcloud/0.1/test/test-amp-soundcloud.js b/extensions/amp-soundcloud/0.1/test/test-amp-soundcloud.js
index 298990cf546e..117912781651 100644
--- a/extensions/amp-soundcloud/0.1/test/test-amp-soundcloud.js
+++ b/extensions/amp-soundcloud/0.1/test/test-amp-soundcloud.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-soundcloud';
 
 describes.realWin(
diff --git a/extensions/amp-soundcloud/1.0/amp-soundcloud.js b/extensions/amp-soundcloud/1.0/amp-soundcloud.js
index 5d0803125fde..d1124763cc27 100644
--- a/extensions/amp-soundcloud/1.0/amp-soundcloud.js
+++ b/extensions/amp-soundcloud/1.0/amp-soundcloud.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isExperimentOn} from '#experiments';
 
 import {BaseElement} from './base-element';
diff --git a/extensions/amp-soundcloud/1.0/base-element.js b/extensions/amp-soundcloud/1.0/base-element.js
index ecf8f9ccdd5f..ddd158f2ae4b 100644
--- a/extensions/amp-soundcloud/1.0/base-element.js
+++ b/extensions/amp-soundcloud/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {PreactBaseElement} from '#preact/base-element';
 
 import {Soundcloud} from './component';
diff --git a/extensions/amp-soundcloud/1.0/component.js b/extensions/amp-soundcloud/1.0/component.js
index 48aa077ef772..bb4126601442 100644
--- a/extensions/amp-soundcloud/1.0/component.js
+++ b/extensions/amp-soundcloud/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-soundcloud/1.0/component.type.js b/extensions/amp-soundcloud/1.0/component.type.js
index 4431b912f976..a55d8ea9dca7 100644
--- a/extensions/amp-soundcloud/1.0/component.type.js
+++ b/extensions/amp-soundcloud/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-soundcloud/1.0/storybook/Basic.amp.js b/extensions/amp-soundcloud/1.0/storybook/Basic.amp.js
index 9132dd4483dd..7b30784a033e 100644
--- a/extensions/amp-soundcloud/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-soundcloud/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {boolean, color, text, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-soundcloud/1.0/storybook/Basic.js b/extensions/amp-soundcloud/1.0/storybook/Basic.js
index cea1c05c1875..6f4aa1b3a479 100644
--- a/extensions/amp-soundcloud/1.0/storybook/Basic.js
+++ b/extensions/amp-soundcloud/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {boolean, color, text, withKnobs} from '@storybook/addon-knobs';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-soundcloud/1.0/storybook/converter.js b/extensions/amp-soundcloud/1.0/storybook/converter.js
index f6d183c4fbdf..b6e26a0fc7cf 100644
--- a/extensions/amp-soundcloud/1.0/storybook/converter.js
+++ b/extensions/amp-soundcloud/1.0/storybook/converter.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Converts RGBA into HEX format
  * @param {string} rgba Input string RGBA(r, g, b, a) format
diff --git a/extensions/amp-soundcloud/1.0/test/test-amp-soundcloud.js b/extensions/amp-soundcloud/1.0/test/test-amp-soundcloud.js
index 4efee13effad..02d482b666d5 100644
--- a/extensions/amp-soundcloud/1.0/test/test-amp-soundcloud.js
+++ b/extensions/amp-soundcloud/1.0/test/test-amp-soundcloud.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-soundcloud';
 import {htmlFor} from '#core/dom/static-template';
 
diff --git a/extensions/amp-soundcloud/amp-soundcloud.md b/extensions/amp-soundcloud/amp-soundcloud.md
index 5043c89400a7..4c2f68e0ca52 100644
--- a/extensions/amp-soundcloud/amp-soundcloud.md
+++ b/extensions/amp-soundcloud/amp-soundcloud.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays a Soundcloud clip.
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-soundcloud
 
 ## Examples
diff --git a/extensions/amp-springboard-player/0.1/amp-springboard-player.js b/extensions/amp-springboard-player/0.1/amp-springboard-player.js
index 75e555a9de4e..fb09aaca8b0b 100644
--- a/extensions/amp-springboard-player/0.1/amp-springboard-player.js
+++ b/extensions/amp-springboard-player/0.1/amp-springboard-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
 import {propagateAttributes} from '#core/dom/propagate-attributes';
 import {PauseHelper} from '#core/dom/video/pause-helper';
diff --git a/extensions/amp-springboard-player/0.1/test/test-amp-springboard-player.js b/extensions/amp-springboard-player/0.1/test/test-amp-springboard-player.js
index 17c171dbfd9b..3d9b0eb05bd0 100644
--- a/extensions/amp-springboard-player/0.1/test/test-amp-springboard-player.js
+++ b/extensions/amp-springboard-player/0.1/test/test-amp-springboard-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-springboard-player';
 
 describes.realWin(
diff --git a/extensions/amp-springboard-player/amp-springboard-player.md b/extensions/amp-springboard-player/amp-springboard-player.md
index 73b495977345..64cc4a5d1d65 100644
--- a/extensions/amp-springboard-player/amp-springboard-player.md
+++ b/extensions/amp-springboard-player/amp-springboard-player.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays a Springboard Platform video player.
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-springboard-player
 
 ## Example
diff --git a/extensions/amp-standalone/0.1/amp-standalone.js b/extensions/amp-standalone/0.1/amp-standalone.js
index 4ebf9a6c68c9..e1eefcf65a96 100644
--- a/extensions/amp-standalone/0.1/amp-standalone.js
+++ b/extensions/amp-standalone/0.1/amp-standalone.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {listen} from '../../../src/event-helper';
diff --git a/extensions/amp-standalone/0.1/test/test-amp-standalone.js b/extensions/amp-standalone/0.1/test/test-amp-standalone.js
index b89be9652419..736ddadf7ce9 100644
--- a/extensions/amp-standalone/0.1/test/test-amp-standalone.js
+++ b/extensions/amp-standalone/0.1/test/test-amp-standalone.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {StandaloneService} from '../amp-standalone';
 
 describes.sandboxed('amp-standalone', {}, (env) => {
diff --git a/extensions/amp-sticky-ad/1.0/amp-sticky-ad.css b/extensions/amp-sticky-ad/1.0/amp-sticky-ad.css
index e6465a1c8b03..8216515455de 100644
--- a/extensions/amp-sticky-ad/1.0/amp-sticky-ad.css
+++ b/extensions/amp-sticky-ad/1.0/amp-sticky-ad.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-sticky-ad {
   position: fixed !important;
diff --git a/extensions/amp-sticky-ad/1.0/amp-sticky-ad.js b/extensions/amp-sticky-ad/1.0/amp-sticky-ad.js
index 2f2035d0f455..44fc3b710cda 100644
--- a/extensions/amp-sticky-ad/1.0/amp-sticky-ad.js
+++ b/extensions/amp-sticky-ad/1.0/amp-sticky-ad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {addExperimentIdToElement} from '#ads/google/a4a/traffic-experiments';
 
 import {CommonSignals} from '#core/constants/common-signals';
diff --git a/extensions/amp-sticky-ad/1.0/test/test-amp-sticky-ad.js b/extensions/amp-sticky-ad/1.0/test/test-amp-sticky-ad.js
index 1ceb6a9439f3..1f657d4d41c6 100644
--- a/extensions/amp-sticky-ad/1.0/test/test-amp-sticky-ad.js
+++ b/extensions/amp-sticky-ad/1.0/test/test-amp-sticky-ad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../../../amp-ad/0.1/amp-ad';
 import '../amp-sticky-ad';
 import {createElementWithAttributes} from '#core/dom';
diff --git a/extensions/amp-sticky-ad/amp-sticky-ad.md b/extensions/amp-sticky-ad/amp-sticky-ad.md
index 35f27ec67f42..4b34b87bb453 100644
--- a/extensions/amp-sticky-ad/amp-sticky-ad.md
+++ b/extensions/amp-sticky-ad/amp-sticky-ad.md
@@ -6,22 +6,6 @@ teaser:
   text: Provides a way to display and stick ad content at the bottom of the page.
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-sticky-ad
 
 ## Usage
diff --git a/extensions/amp-story-360/0.1/amp-story-360.css b/extensions/amp-story-360/0.1/amp-story-360.css
index 086eccee919a..0007c34971a6 100644
--- a/extensions/amp-story-360/0.1/amp-story-360.css
+++ b/extensions/amp-story-360/0.1/amp-story-360.css
@@ -1,19 +1,5 @@
 
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-story-360 canvas {
   position: absolute; /* fixes Safari bug */
diff --git a/extensions/amp-story-360/0.1/amp-story-360.js b/extensions/amp-story-360/0.1/amp-story-360.js
index 836fe8e4753f..7f78b2caa77d 100644
--- a/extensions/amp-story-360/0.1/amp-story-360.js
+++ b/extensions/amp-story-360/0.1/amp-story-360.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Must be served over https for permissions API to work.
  * For local development, run amp --host="192.168.44.47" --https --extensions=amp-story-360
diff --git a/extensions/amp-story-360/0.1/test/test-amp-story-360.js b/extensions/amp-story-360/0.1/test/test-amp-story-360.js
index 95294d6e0853..0da487614c13 100644
--- a/extensions/amp-story-360/0.1/test/test-amp-story-360.js
+++ b/extensions/amp-story-360/0.1/test/test-amp-story-360.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-story-360';
 import {createElementWithAttributes} from '#core/dom';
 
diff --git a/extensions/amp-story-auto-ads/0.1/_locales/index.js b/extensions/amp-story-auto-ads/0.1/_locales/index.js
index 0ceff652bacb..7f16faa72de7 100644
--- a/extensions/amp-story-auto-ads/0.1/_locales/index.js
+++ b/extensions/amp-story-auto-ads/0.1/_locales/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import LocalizedStringaf from './af.json' assert {type: 'json'}; // lgtm[js/syntax-error]
 import LocalizedStringam from './am.json' assert {type: 'json'}; // lgtm[js/syntax-error]
 import LocalizedStringar from './ar.json' assert {type: 'json'}; // lgtm[js/syntax-error]
diff --git a/extensions/amp-story-auto-ads/0.1/algorithm-count-pages.js b/extensions/amp-story-auto-ads/0.1/algorithm-count-pages.js
index d2415786f934..8f802b5259a5 100644
--- a/extensions/amp-story-auto-ads/0.1/algorithm-count-pages.js
+++ b/extensions/amp-story-auto-ads/0.1/algorithm-count-pages.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {hasOwn, map} from '#core/types/object';
 
 import {InsertionState} from './story-ad-page-manager';
diff --git a/extensions/amp-story-auto-ads/0.1/algorithm-interface.js b/extensions/amp-story-auto-ads/0.1/algorithm-interface.js
index 09301130be6e..4cf6fa1a1d66 100644
--- a/extensions/amp-story-auto-ads/0.1/algorithm-interface.js
+++ b/extensions/amp-story-auto-ads/0.1/algorithm-interface.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Interface for all story ad placement algorithms.
  * @interface
diff --git a/extensions/amp-story-auto-ads/0.1/algorithm-predetermined.js b/extensions/amp-story-auto-ads/0.1/algorithm-predetermined.js
index ba088b5e8061..d106467fd4af 100644
--- a/extensions/amp-story-auto-ads/0.1/algorithm-predetermined.js
+++ b/extensions/amp-story-auto-ads/0.1/algorithm-predetermined.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {StoryAdPlacements} from '#experiments/story-ad-placements';
 
 import {StateProperty} from '../../amp-story/1.0/amp-story-store-service';
diff --git a/extensions/amp-story-auto-ads/0.1/algorithm-utils.js b/extensions/amp-story-auto-ads/0.1/algorithm-utils.js
index 58bd56e4337f..fa7a9d3bf9e4 100644
--- a/extensions/amp-story-auto-ads/0.1/algorithm-utils.js
+++ b/extensions/amp-story-auto-ads/0.1/algorithm-utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getExperimentBranch} from '#experiments';
 import {StoryAdPlacements} from '#experiments/story-ad-placements';
 
diff --git a/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-ad-badge.css b/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-ad-badge.css
index 2fc83e40bcda..7b69aca0123b 100644
--- a/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-ad-badge.css
+++ b/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-ad-badge.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .i-amphtml-ad-overlay-container {
   align-items: center !important;
diff --git a/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-attribution.css b/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-attribution.css
index f961c3390c50..71e8ff4142c7 100644
--- a/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-attribution.css
+++ b/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-attribution.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .i-amphtml-story-ad-attribution {
   position: absolute;
diff --git a/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-cta-button.css b/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-cta-button.css
index be72a3cccac7..7660b0dcee37 100644
--- a/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-cta-button.css
+++ b/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-cta-button.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /* If you are changing anything here that affects font, please update measurer
  in story-ad-button-text-fitter.js */
diff --git a/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-inabox.css b/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-inabox.css
index 78988df2539a..b1dc649a76df 100644
--- a/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-inabox.css
+++ b/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-inabox.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-story-cta-layer {
   display: block !important;
diff --git a/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-progress-bar.css b/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-progress-bar.css
index e696d14e8626..18b47a151441 100644
--- a/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-progress-bar.css
+++ b/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-progress-bar.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .i-amphtml-story-ad-progress-background {
   background: hsla(0, 0%, 100%, 0.4) !important;
diff --git a/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-shared.css b/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-shared.css
index 10959a621e03..5142b6a6fa1b 100644
--- a/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-shared.css
+++ b/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads-shared.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /* CSS shared between amp-story-auto-ads and inabox story ad rendering. */
 
diff --git a/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads.css b/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads.css
index d57f651f5208..c7b949c2861c 100644
--- a/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads.css
+++ b/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .i-amphtml-story-desktop-panels amp-story-page[i-amphtml-loading][ad] {
   /* Move below viewport so that ad preloads */
diff --git a/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads.js b/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads.js
index a2662e4934cd..f8b378fc1fb9 100644
--- a/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads.js
+++ b/extensions/amp-story-auto-ads/0.1/amp-story-auto-ads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CommonSignals} from '#core/constants/common-signals';
 import {toggleAttribute} from '#core/dom';
 import {svgFor} from '#core/dom/static-template';
diff --git a/extensions/amp-story-auto-ads/0.1/story-ad-analytics.js b/extensions/amp-story-auto-ads/0.1/story-ad-analytics.js
index 501b67f5269c..ad673228b321 100644
--- a/extensions/amp-story-auto-ads/0.1/story-ad-analytics.js
+++ b/extensions/amp-story-auto-ads/0.1/story-ad-analytics.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {getUniqueId} from './utils';
diff --git a/extensions/amp-story-auto-ads/0.1/story-ad-button-text-fitter.js b/extensions/amp-story-auto-ads/0.1/story-ad-button-text-fitter.js
index c9b21aad8839..13e66230b9cf 100644
--- a/extensions/amp-story-auto-ads/0.1/story-ad-button-text-fitter.js
+++ b/extensions/amp-story-auto-ads/0.1/story-ad-button-text-fitter.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {px, setStyle, setStyles} from '#core/dom/style';
 
 import {Services} from '#service';
diff --git a/extensions/amp-story-auto-ads/0.1/story-ad-config.js b/extensions/amp-story-auto-ads/0.1/story-ad-config.js
index 1939fa0cff4d..a7d2cef52f15 100644
--- a/extensions/amp-story-auto-ads/0.1/story-ad-config.js
+++ b/extensions/amp-story-auto-ads/0.1/story-ad-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isJsonScriptTag} from '#core/dom';
 import {isObject} from '#core/types';
 import {parseJson} from '#core/types/object/json';
diff --git a/extensions/amp-story-auto-ads/0.1/story-ad-localization.js b/extensions/amp-story-auto-ads/0.1/story-ad-localization.js
index e4c9108f099f..20c51fb4a98b 100644
--- a/extensions/amp-story-auto-ads/0.1/story-ad-localization.js
+++ b/extensions/amp-story-auto-ads/0.1/story-ad-localization.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {LocalizationService} from '#service/localization';
 import {
diff --git a/extensions/amp-story-auto-ads/0.1/story-ad-page-manager.js b/extensions/amp-story-auto-ads/0.1/story-ad-page-manager.js
index 5cc69bbd84a5..788cdfbe01b2 100644
--- a/extensions/amp-story-auto-ads/0.1/story-ad-page-manager.js
+++ b/extensions/amp-story-auto-ads/0.1/story-ad-page-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {findIndex} from '#core/types/array';
 
 import {
diff --git a/extensions/amp-story-auto-ads/0.1/story-ad-page.js b/extensions/amp-story-auto-ads/0.1/story-ad-page.js
index eb766986e655..938fcdb68217 100644
--- a/extensions/amp-story-auto-ads/0.1/story-ad-page.js
+++ b/extensions/amp-story-auto-ads/0.1/story-ad-page.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {CommonSignals} from '#core/constants/common-signals';
 import {
   createElementWithAttributes,
diff --git a/extensions/amp-story-auto-ads/0.1/story-ad-ui.js b/extensions/amp-story-auto-ads/0.1/story-ad-ui.js
index d09b1fd90e42..dbbc6d922bae 100644
--- a/extensions/amp-story-auto-ads/0.1/story-ad-ui.js
+++ b/extensions/amp-story-auto-ads/0.1/story-ad-ui.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes, iterateCursor} from '#core/dom';
 import {dict, map} from '#core/types/object';
 
diff --git a/extensions/amp-story-auto-ads/0.1/test-e2e/test-amp-story-auto-ads-fullbleed.js b/extensions/amp-story-auto-ads/0.1/test-e2e/test-amp-story-auto-ads-fullbleed.js
index 3f353aa40449..3a8b7e7f8ddb 100644
--- a/extensions/amp-story-auto-ads/0.1/test-e2e/test-amp-story-auto-ads-fullbleed.js
+++ b/extensions/amp-story-auto-ads/0.1/test-e2e/test-amp-story-auto-ads-fullbleed.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   clickThroughPages,
   switchToAdFrame,
diff --git a/extensions/amp-story-auto-ads/0.1/test-e2e/test-amp-story-auto-ads-utils.js b/extensions/amp-story-auto-ads/0.1/test-e2e/test-amp-story-auto-ads-utils.js
index b737438a58b0..ab90c7493e2d 100644
--- a/extensions/amp-story-auto-ads/0.1/test-e2e/test-amp-story-auto-ads-utils.js
+++ b/extensions/amp-story-auto-ads/0.1/test-e2e/test-amp-story-auto-ads-utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 export async function clickThroughPages(controller, numPages) {
   for (let i = 0; i < numPages; i++) {
     const page = await controller.findElement('[active]');
diff --git a/extensions/amp-story-auto-ads/0.1/test-e2e/test-amp-story-auto-ads.js b/extensions/amp-story-auto-ads/0.1/test-e2e/test-amp-story-auto-ads.js
index abe21abe62a2..d4db8218838f 100644
--- a/extensions/amp-story-auto-ads/0.1/test-e2e/test-amp-story-auto-ads.js
+++ b/extensions/amp-story-auto-ads/0.1/test-e2e/test-amp-story-auto-ads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   clickThroughPages,
   switchToAdFrame,
diff --git a/extensions/amp-story-auto-ads/0.1/test/story-mock.js b/extensions/amp-story-auto-ads/0.1/test/story-mock.js
index c3feff009c2b..ec527866093f 100644
--- a/extensions/amp-story-auto-ads/0.1/test/story-mock.js
+++ b/extensions/amp-story-auto-ads/0.1/test/story-mock.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CommonSignals} from '#core/constants/common-signals';
 
 /**
diff --git a/extensions/amp-story-auto-ads/0.1/test/test-algorithm-count-pages.js b/extensions/amp-story-auto-ads/0.1/test/test-algorithm-count-pages.js
index f5e95d137b59..bf99a155dac0 100644
--- a/extensions/amp-story-auto-ads/0.1/test/test-algorithm-count-pages.js
+++ b/extensions/amp-story-auto-ads/0.1/test/test-algorithm-count-pages.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {macroTask} from '#testing/helpers';
 
 import {AmpStory} from '../../../amp-story/1.0/amp-story';
diff --git a/extensions/amp-story-auto-ads/0.1/test/test-algorithm-predetermined.js b/extensions/amp-story-auto-ads/0.1/test/test-algorithm-predetermined.js
index c8fcbb7dc49f..0268845e70ec 100644
--- a/extensions/amp-story-auto-ads/0.1/test/test-algorithm-predetermined.js
+++ b/extensions/amp-story-auto-ads/0.1/test/test-algorithm-predetermined.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {StoryAdPlacements} from '#experiments/story-ad-placements';
 
 import {AmpStory} from '../../../amp-story/1.0/amp-story';
diff --git a/extensions/amp-story-auto-ads/0.1/test/test-amp-story-auto-ads.js b/extensions/amp-story-auto-ads/0.1/test/test-amp-story-auto-ads.js
index 29a3d87297e5..7de05119d1e2 100644
--- a/extensions/amp-story-auto-ads/0.1/test/test-amp-story-auto-ads.js
+++ b/extensions/amp-story-auto-ads/0.1/test/test-amp-story-auto-ads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CommonSignals} from '#core/constants/common-signals';
 
 import {forceExperimentBranch, toggleExperiment} from '#experiments';
diff --git a/extensions/amp-story-auto-ads/0.1/test/test-story-ad-analytics.js b/extensions/amp-story-auto-ads/0.1/test/test-story-ad-analytics.js
index e931e078e5a6..135724196ad6 100644
--- a/extensions/amp-story-auto-ads/0.1/test/test-story-ad-analytics.js
+++ b/extensions/amp-story-auto-ads/0.1/test/test-story-ad-analytics.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as analyticsApi from '../../../../src/analytics';
 import {
   AnalyticsEvents,
diff --git a/extensions/amp-story-auto-ads/0.1/test/test-story-ad-config.js b/extensions/amp-story-auto-ads/0.1/test/test-story-ad-config.js
index 8d95447265b6..76df3fc4b225 100644
--- a/extensions/amp-story-auto-ads/0.1/test/test-story-ad-config.js
+++ b/extensions/amp-story-auto-ads/0.1/test/test-story-ad-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {createStoryAdElementAndConfig} from './story-mock';
diff --git a/extensions/amp-story-auto-ads/0.1/test/test-story-ad-localization-strings.js b/extensions/amp-story-auto-ads/0.1/test/test-story-ad-localization-strings.js
index 34b2dbeb6acb..d304fe59955a 100644
--- a/extensions/amp-story-auto-ads/0.1/test/test-story-ad-localization-strings.js
+++ b/extensions/amp-story-auto-ads/0.1/test/test-story-ad-localization-strings.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {LocalizedStringId} from '#service/localization/strings';
 
 import localesObjs from '../_locales';
diff --git a/extensions/amp-story-auto-ads/0.1/test/test-story-ad-localization.js b/extensions/amp-story-auto-ads/0.1/test/test-story-ad-localization.js
index da85a59c3b11..dbb27e77b25e 100644
--- a/extensions/amp-story-auto-ads/0.1/test/test-story-ad-localization.js
+++ b/extensions/amp-story-auto-ads/0.1/test/test-story-ad-localization.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CtaTypes, StoryAdLocalization} from '../story-ad-localization';
 
 describes.realWin('amp-story-auto-ads:localization', {amp: true}, (env) => {
diff --git a/extensions/amp-story-auto-ads/0.1/test/test-story-ad-page-manager.js b/extensions/amp-story-auto-ads/0.1/test/test-story-ad-page-manager.js
index 531112a291cc..b5d758a494bf 100644
--- a/extensions/amp-story-auto-ads/0.1/test/test-story-ad-page-manager.js
+++ b/extensions/amp-story-auto-ads/0.1/test/test-story-ad-page-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {macroTask} from '#testing/helpers';
 
 import {getServiceForDoc} from '../../../../src/service-helpers';
diff --git a/extensions/amp-story-auto-ads/0.1/test/test-story-ad-page.js b/extensions/amp-story-auto-ads/0.1/test/test-story-ad-page.js
index 9d6932afa06d..9e80dbd2d8b6 100644
--- a/extensions/amp-story-auto-ads/0.1/test/test-story-ad-page.js
+++ b/extensions/amp-story-auto-ads/0.1/test/test-story-ad-page.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CommonSignals} from '#core/constants/common-signals';
 
 import {forceExperimentBranch} from '#experiments';
diff --git a/extensions/amp-story-auto-ads/0.1/test/test-story-ad-ui.js b/extensions/amp-story-auto-ads/0.1/test/test-story-ad-ui.js
index 9a40be4c43df..016644638850 100644
--- a/extensions/amp-story-auto-ads/0.1/test/test-story-ad-ui.js
+++ b/extensions/amp-story-auto-ads/0.1/test/test-story-ad-ui.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ButtonTextFitter} from '../story-ad-button-text-fitter';
 import {
   A4AVarNames,
diff --git a/extensions/amp-story-auto-ads/0.1/utils.js b/extensions/amp-story-auto-ads/0.1/utils.js
index b31857897ba7..4e6ebec9e178 100644
--- a/extensions/amp-story-auto-ads/0.1/utils.js
+++ b/extensions/amp-story-auto-ads/0.1/utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getCryptoRandomBytesArray} from '#core/types/string/bytes';
 
 import {CtaTypes} from './story-ad-localization';
diff --git a/extensions/amp-story-auto-analytics/0.1/amp-story-auto-analytics.js b/extensions/amp-story-auto-analytics/0.1/amp-story-auto-analytics.js
index 5974430bd766..728c6254c262 100644
--- a/extensions/amp-story-auto-analytics/0.1/amp-story-auto-analytics.js
+++ b/extensions/amp-story-auto-analytics/0.1/amp-story-auto-analytics.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {htmlFor} from '#core/dom/static-template';
 
 import {Services} from '#service';
diff --git a/extensions/amp-story-auto-analytics/0.1/test/test-amp-story-auto-analytics.js b/extensions/amp-story-auto-analytics/0.1/test/test-amp-story-auto-analytics.js
index 7aa980b1873f..f170df8cbae0 100644
--- a/extensions/amp-story-auto-analytics/0.1/test/test-amp-story-auto-analytics.js
+++ b/extensions/amp-story-auto-analytics/0.1/test/test-amp-story-auto-analytics.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-story-auto-analytics';
 import {createElementWithAttributes} from '#core/dom';
 
diff --git a/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools-tab-debug.css b/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools-tab-debug.css
index 07b67265f776..e35880114182 100644
--- a/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools-tab-debug.css
+++ b/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools-tab-debug.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-story-dev-tools-tab-debug {
   overflow-y: auto !important;
diff --git a/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools-tab-debug.js b/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools-tab-debug.js
index f1751d75ebd0..9cfc2b9b8c77 100644
--- a/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools-tab-debug.js
+++ b/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools-tab-debug.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes} from '#core/dom';
 import {htmlFor} from '#core/dom/static-template';
 
diff --git a/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools-tab-preview.css b/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools-tab-preview.css
index 7b156087d418..bb74d195396e 100644
--- a/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools-tab-preview.css
+++ b/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools-tab-preview.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
  amp-story-dev-tools-tab-preview {
   --i-amphtml-story-dev-tools-device-shadow: 0px 11.0046px 27.5114px rgba(0, 0, 0, 0.34), inset 0px 2.20091px 3.30137px rgba(44, 46, 52, 0.6) !important;
diff --git a/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools-tab-preview.js b/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools-tab-preview.js
index e4c34c179d0e..8922546ec62e 100644
--- a/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools-tab-preview.js
+++ b/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools-tab-preview.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {escapeCssSelectorIdent} from '#core/dom/css-selectors';
 import {observeContentSize} from '#core/dom/layout/size-observer';
 import {closest} from '#core/dom/query';
diff --git a/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools.css b/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools.css
index 260e55b68e0a..a9e6c8ed7ee5 100644
--- a/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools.css
+++ b/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import './amp-story-dev-tools-tab-debug.css';
 @import './amp-story-dev-tools-tab-preview.css';
diff --git a/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools.js b/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools.js
index e4abc7b1010a..97051ba7caa5 100644
--- a/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools.js
+++ b/extensions/amp-story-dev-tools/0.1/amp-story-dev-tools.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {htmlFor} from '#core/dom/static-template';
 import {toggle} from '#core/dom/style';
 import {parseQueryString} from '#core/types/string/url';
diff --git a/extensions/amp-story-dev-tools/0.1/utils.js b/extensions/amp-story-dev-tools/0.1/utils.js
index 7fb4b37cb002..050f2675a54b 100644
--- a/extensions/amp-story-dev-tools/0.1/utils.js
+++ b/extensions/amp-story-dev-tools/0.1/utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseQueryString} from '#core/types/string/url';
 
 /**
diff --git a/extensions/amp-story-education/0.1/amp-story-education.css b/extensions/amp-story-education/0.1/amp-story-education.css
index 2a14e55268a8..2992a26d42dc 100644
--- a/extensions/amp-story-education/0.1/amp-story-education.css
+++ b/extensions/amp-story-education/0.1/amp-story-education.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import url('https://fonts.googleapis.com/css?family=Open+Sans:400,600,700');
 @import '../../amp-story/1.0/amp-story-shadow-reset.css';
diff --git a/extensions/amp-story-education/0.1/amp-story-education.js b/extensions/amp-story-education/0.1/amp-story-education.js
index 4c44d5110bce..2694b8f1dfc9 100644
--- a/extensions/amp-story-education/0.1/amp-story-education.js
+++ b/extensions/amp-story-education/0.1/amp-story-education.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeChildren} from '#core/dom';
 import {Layout} from '#core/dom/layout';
 import {setModalAsClosed, setModalAsOpen} from '#core/dom/modal';
diff --git a/extensions/amp-story-education/0.1/test/test-amp-story-education.js b/extensions/amp-story-education/0.1/test/test-amp-story-education.js
index 6e089983b3be..467d3e87e700 100644
--- a/extensions/amp-story-education/0.1/test/test-amp-story-education.js
+++ b/extensions/amp-story-education/0.1/test/test-amp-story-education.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {AmpDocSingle} from '#service/ampdoc-impl';
 import {LocalizationService} from '#service/localization';
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive-abstract.js b/extensions/amp-story-interactive/0.1/amp-story-interactive-abstract.js
index 3044ae1071dc..05e1c65e46ea 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive-abstract.js
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive-abstract.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   ANALYTICS_TAG_NAME,
   StoryAnalyticsEvent,
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive-binary-poll.css b/extensions/amp-story-interactive/0.1/amp-story-interactive-binary-poll.css
index e26abf18554d..baba41736be9 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive-binary-poll.css
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive-binary-poll.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /* 1em = 16px for interactive components, unless overriden by font-size */
 .i-amphtml-story-interactive-binary-poll-container {
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive-binary-poll.js b/extensions/amp-story-interactive/0.1/amp-story-interactive-binary-poll.js
index 730717dff063..981c72b10e6a 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive-binary-poll.js
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive-binary-poll.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   AmpStoryInteractive,
   InteractiveType,
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive-disclaimer.css b/extensions/amp-story-interactive/0.1/amp-story-interactive-disclaimer.css
index 128faaa0fcf6..6bfcb69e54d2 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive-disclaimer.css
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive-disclaimer.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .i-amphtml-story-interactive-disclaimer-dialog {
   overflow: hidden !important;
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive-img-poll.css b/extensions/amp-story-interactive/0.1/amp-story-interactive-img-poll.css
index 7a4ef55a9d1d..34ed2381a3b1 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive-img-poll.css
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive-img-poll.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .i-amphtml-story-interactive-img-option {
   --i-amphtml-interactive-option-post-color: var(
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive-img-poll.js b/extensions/amp-story-interactive/0.1/amp-story-interactive-img-poll.js
index cb3c180bf240..b94a5021432f 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive-img-poll.js
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive-img-poll.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   AmpStoryInteractive,
   InteractiveType,
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive-img-quiz.css b/extensions/amp-story-interactive/0.1/amp-story-interactive-img-quiz.css
index a54878fbe5e2..6e265633d96d 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive-img-quiz.css
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive-img-quiz.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .i-amphtml-story-interactive-img-quiz-answer-choice {
   position: absolute !important;
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive-img-quiz.js b/extensions/amp-story-interactive/0.1/amp-story-interactive-img-quiz.js
index 5c29ae4ae572..b198b183452a 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive-img-quiz.js
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive-img-quiz.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   AmpStoryInteractive,
   InteractiveType,
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive-img.css b/extensions/amp-story-interactive/0.1/amp-story-interactive-img.css
index cc7094284e13..6e37408c81a6 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive-img.css
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive-img.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .i-amphtml-story-interactive-img-container {
   --i-amphtml-interactive-img-option-size: 7.5em !important;
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive-poll.css b/extensions/amp-story-interactive/0.1/amp-story-interactive-poll.css
index 93062d732ad2..f29555fe2a02 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive-poll.css
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive-poll.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /* 1em = 16px for interactive components, unless overriden by font-size */
 .i-amphtml-story-interactive-option-container {
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive-poll.js b/extensions/amp-story-interactive/0.1/amp-story-interactive-poll.js
index e3e311db85d4..dba0083ec7a3 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive-poll.js
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive-poll.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   AmpStoryInteractive,
   InteractiveType,
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive-quiz.css b/extensions/amp-story-interactive/0.1/amp-story-interactive-quiz.css
index 489a0b1c68b1..c7aa4aec8de7 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive-quiz.css
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive-quiz.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /* 1em = 16px for interactive components, unless overriden by font-size */
 .i-amphtml-story-interactive-quiz-option-container {
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive-quiz.js b/extensions/amp-story-interactive/0.1/amp-story-interactive-quiz.js
index 1fe2491bb3f0..f593f15bb74e 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive-quiz.js
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive-quiz.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   AmpStoryInteractive,
   InteractiveType,
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive-results-detailed.css b/extensions/amp-story-interactive/0.1/amp-story-interactive-results-detailed.css
index f71e3a928639..271e1ddc1043 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive-results-detailed.css
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive-results-detailed.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .i-amphtml-story-interactive-results-detailed {
   position: relative !important;
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive-results-detailed.js b/extensions/amp-story-interactive/0.1/amp-story-interactive-results-detailed.js
index 134df6c7a878..70c68822669d 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive-results-detailed.js
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive-results-detailed.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {InteractiveType} from './amp-story-interactive-abstract';
 import {
   AmpStoryInteractiveResults,
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive-results.css b/extensions/amp-story-interactive/0.1/amp-story-interactive-results.css
index 944eec1bed16..cbfeb445f60a 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive-results.css
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive-results.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /* 1em = 16px for interactive components, unless overriden by font-size */
 .i-amphtml-story-interactive-results-container {
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive-results.js b/extensions/amp-story-interactive/0.1/amp-story-interactive-results.js
index a3e9d38850e2..f734a2d84b03 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive-results.js
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive-results.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   AmpStoryInteractive,
   InteractiveType,
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive-slider.css b/extensions/amp-story-interactive/0.1/amp-story-interactive-slider.css
index 21dd2ac7a077..1f5fa8e9d866 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive-slider.css
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive-slider.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .i-amphtml-story-interactive-slider-container {
   --average: 0%;
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive-slider.js b/extensions/amp-story-interactive/0.1/amp-story-interactive-slider.js
index 1771a7fa85bb..0b3c703b1105 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive-slider.js
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive-slider.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   AmpStoryInteractive,
   InteractiveType,
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive.css b/extensions/amp-story-interactive/0.1/amp-story-interactive.css
index e582fc9adedd..cdb6dda7ddba 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive.css
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /* 1em = 16px for interactive components, unless overriden by font-size */
 .i-amphtml-story-interactive-container {
diff --git a/extensions/amp-story-interactive/0.1/amp-story-interactive.js b/extensions/amp-story-interactive/0.1/amp-story-interactive.js
index 7b3792b86175..700bfd038c7c 100644
--- a/extensions/amp-story-interactive/0.1/amp-story-interactive.js
+++ b/extensions/amp-story-interactive/0.1/amp-story-interactive.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpStoryInteractiveBinaryPoll} from './amp-story-interactive-binary-poll';
 import {AmpStoryInteractiveImgPoll} from './amp-story-interactive-img-poll';
 import {AmpStoryInteractiveImgQuiz} from './amp-story-interactive-img-quiz';
diff --git a/extensions/amp-story-interactive/0.1/interactive-confetti.js b/extensions/amp-story-interactive/0.1/interactive-confetti.js
index 767b6b7f297e..0fc98a97f12c 100644
--- a/extensions/amp-story-interactive/0.1/interactive-confetti.js
+++ b/extensions/amp-story-interactive/0.1/interactive-confetti.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {htmlFor} from '#core/dom/static-template';
 import {setStyles} from '#core/dom/style';
diff --git a/extensions/amp-story-interactive/0.1/interactive-disclaimer.js b/extensions/amp-story-interactive/0.1/interactive-disclaimer.js
index a4f79697ecd0..cb4dda76a1c8 100644
--- a/extensions/amp-story-interactive/0.1/interactive-disclaimer.js
+++ b/extensions/amp-story-interactive/0.1/interactive-disclaimer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview
  * Interactive components support a disclaimer bubble that tells users where their data is being sent to.
diff --git a/extensions/amp-story-interactive/0.1/test/helpers.js b/extensions/amp-story-interactive/0.1/test/helpers.js
index 44366904df57..1dcafb6b38e2 100644
--- a/extensions/amp-story-interactive/0.1/test/helpers.js
+++ b/extensions/amp-story-interactive/0.1/test/helpers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Returns mock interactive data.
  *
diff --git a/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-binary-poll.js b/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-binary-poll.js
index 115d9f702b53..c7960fa3533a 100644
--- a/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-binary-poll.js
+++ b/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-binary-poll.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpDocSingle} from '#service/ampdoc-impl';
 import {AmpStoryInteractiveBinaryPoll} from '../amp-story-interactive-binary-poll';
 import {AmpStoryRequestService} from '../../../amp-story/1.0/amp-story-request-service';
diff --git a/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-img-poll.js b/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-img-poll.js
index 4581773b368d..118392022a66 100644
--- a/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-img-poll.js
+++ b/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-img-poll.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpDocSingle} from '#service/ampdoc-impl';
 import {AmpStoryInteractiveImgPoll} from '../amp-story-interactive-img-poll';
 import {AmpStoryRequestService} from '../../../amp-story/1.0/amp-story-request-service';
diff --git a/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-img-quiz.js b/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-img-quiz.js
index f50bf0f9a7fc..7ea4bdd85e89 100644
--- a/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-img-quiz.js
+++ b/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-img-quiz.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpDocSingle} from '#service/ampdoc-impl';
 import {AmpStoryInteractiveImgQuiz} from '../amp-story-interactive-img-quiz';
 import {AmpStoryRequestService} from '../../../amp-story/1.0/amp-story-request-service';
diff --git a/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-poll.js b/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-poll.js
index 63ed933c9fd9..926aa22340ba 100644
--- a/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-poll.js
+++ b/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-poll.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpDocSingle} from '#service/ampdoc-impl';
 import {AmpStoryInteractivePoll} from '../amp-story-interactive-poll';
 import {AmpStoryRequestService} from '../../../amp-story/1.0/amp-story-request-service';
diff --git a/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-quiz.js b/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-quiz.js
index 7ddb6be5248e..07cdc6396c32 100644
--- a/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-quiz.js
+++ b/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-quiz.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpDocSingle} from '#service/ampdoc-impl';
 import {AmpStoryInteractiveQuiz} from '../amp-story-interactive-quiz';
 import {AmpStoryRequestService} from '../../../amp-story/1.0/amp-story-request-service';
diff --git a/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-results-detailed.js b/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-results-detailed.js
index 9d956f6d0902..26f62c2e34d4 100644
--- a/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-results-detailed.js
+++ b/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-results-detailed.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   Action,
   AmpStoryStoreService,
diff --git a/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-results.js b/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-results.js
index 4b6670128d3f..d8168ee4305d 100644
--- a/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-results.js
+++ b/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-results.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   Action,
   AmpStoryStoreService,
diff --git a/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-slider.js b/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-slider.js
index ff694e187f80..39c99da73942 100644
--- a/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-slider.js
+++ b/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive-slider.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpStoryInteractiveSlider} from '../amp-story-interactive-slider';
 import {AmpStoryStoreService} from '../../../amp-story/1.0/amp-story-store-service';
 import {registerServiceBuilder} from '../../../../src/service-helpers';
diff --git a/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive.js b/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive.js
index 1b756df2a517..48fcb5da86e1 100644
--- a/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive.js
+++ b/extensions/amp-story-interactive/0.1/test/test-amp-story-interactive.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpDocSingle} from '#service/ampdoc-impl';
 import {
   AmpStoryInteractive,
diff --git a/extensions/amp-story-interactive/0.1/utils.js b/extensions/amp-story-interactive/0.1/utils.js
index 7ec8325780cf..8bafed7c3544 100644
--- a/extensions/amp-story-interactive/0.1/utils.js
+++ b/extensions/amp-story-interactive/0.1/utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {htmlFor} from '#core/dom/static-template';
 import {map} from '#core/types/object';
 import {user} from '../../../src/log';
diff --git a/extensions/amp-story-panning-media/0.1/amp-story-panning-media.css b/extensions/amp-story-panning-media/0.1/amp-story-panning-media.css
index a0c2efb842cc..0c2f68283a44 100644
--- a/extensions/amp-story-panning-media/0.1/amp-story-panning-media.css
+++ b/extensions/amp-story-panning-media/0.1/amp-story-panning-media.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-story-panning-media {
   /* Child img gets 100% height. This centers the image. */
diff --git a/extensions/amp-story-panning-media/0.1/amp-story-panning-media.js b/extensions/amp-story-panning-media/0.1/amp-story-panning-media.js
index 4b159f1ce6ae..5240430b5e85 100644
--- a/extensions/amp-story-panning-media/0.1/amp-story-panning-media.js
+++ b/extensions/amp-story-panning-media/0.1/amp-story-panning-media.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CommonSignals} from '#core/constants/common-signals';
 import {whenUpgradedToCustomElement} from '#core/dom/amp-element-helpers';
 import {Layout} from '#core/dom/layout';
diff --git a/extensions/amp-story-panning-media/0.1/test/test-amp-story-panning-media.js b/extensions/amp-story-panning-media/0.1/test/test-amp-story-panning-media.js
index 352d0b5b887f..b48831b239d1 100644
--- a/extensions/amp-story-panning-media/0.1/test/test-amp-story-panning-media.js
+++ b/extensions/amp-story-panning-media/0.1/test/test-amp-story-panning-media.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-story-panning-media';
 import {createElementWithAttributes} from '#core/dom';
 
diff --git a/extensions/amp-story-player/0.1/amp-story-player.css b/extensions/amp-story-player/0.1/amp-story-player.css
index c474a3ab4441..7f33587a1c82 100644
--- a/extensions/amp-story-player/0.1/amp-story-player.css
+++ b/extensions/amp-story-player/0.1/amp-story-player.css
@@ -1,17 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import '../../../css/amp-story-player.css'
diff --git a/extensions/amp-story-player/0.1/amp-story-player.js b/extensions/amp-story-player/0.1/amp-story-player.js
index 5b3b4d781bd6..82c900b58e3c 100644
--- a/extensions/amp-story-player/0.1/amp-story-player.js
+++ b/extensions/amp-story-player/0.1/amp-story-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isLayoutSizeDefined} from '#core/dom/layout';
 
 import {cssText} from '../../../build/amp-story-player.css';
diff --git a/extensions/amp-story-player/0.1/test/test-e2e/test-amp-story-player-navigation.js b/extensions/amp-story-player/0.1/test/test-e2e/test-amp-story-player-navigation.js
index bead5bfeab2a..af08105130fe 100644
--- a/extensions/amp-story-player/0.1/test/test-e2e/test-amp-story-player-navigation.js
+++ b/extensions/amp-story-player/0.1/test/test-e2e/test-amp-story-player-navigation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const VIEWPORT = {
   HEIGHT: 768,
   WIDTH: 1024,
diff --git a/extensions/amp-story-player/0.1/test/test-e2e/test-amp-story-player-prerender.js b/extensions/amp-story-player/0.1/test/test-e2e/test-amp-story-player-prerender.js
index 8c3a58c59458..919d4ed78fa6 100644
--- a/extensions/amp-story-player/0.1/test/test-e2e/test-amp-story-player-prerender.js
+++ b/extensions/amp-story-player/0.1/test/test-e2e/test-amp-story-player-prerender.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const VIEWPORT = {
   HEIGHT: 768,
   WIDTH: 1024,
diff --git a/extensions/amp-story-player/0.1/test/test-e2e/test-amp-story-player.js b/extensions/amp-story-player/0.1/test/test-e2e/test-amp-story-player.js
index d42857ff48ed..e3ca2f483253 100644
--- a/extensions/amp-story-player/0.1/test/test-e2e/test-amp-story-player.js
+++ b/extensions/amp-story-player/0.1/test/test-e2e/test-amp-story-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const VIEWPORT = {
   HEIGHT: 768,
   WIDTH: 1024,
diff --git a/extensions/amp-story/1.0/_locales/index.js b/extensions/amp-story/1.0/_locales/index.js
index b923888269e5..941e1fe0f54b 100644
--- a/extensions/amp-story/1.0/_locales/index.js
+++ b/extensions/amp-story/1.0/_locales/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import LocalizedStringaf from './af.json' assert {type: 'json'}; // lgtm[js/syntax-error]
 import LocalizedStringam from './am.json' assert {type: 'json'}; // lgtm[js/syntax-error]
 import LocalizedStringar from './ar.json' assert {type: 'json'}; // lgtm[js/syntax-error]
diff --git a/extensions/amp-story/1.0/amp-story-access.css b/extensions/amp-story/1.0/amp-story-access.css
index f8a1415812de..7ce37c3813e8 100644
--- a/extensions/amp-story/1.0/amp-story-access.css
+++ b/extensions/amp-story/1.0/amp-story-access.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-story-access {
   position: absolute !important;
diff --git a/extensions/amp-story/1.0/amp-story-access.js b/extensions/amp-story/1.0/amp-story-access.js
index b65feab73238..9fbe81a20f52 100644
--- a/extensions/amp-story/1.0/amp-story-access.js
+++ b/extensions/amp-story/1.0/amp-story-access.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   Action,
   StateProperty,
diff --git a/extensions/amp-story/1.0/amp-story-affiliate-link.css b/extensions/amp-story/1.0/amp-story-affiliate-link.css
index f79ccf2781bd..bdd884ce6bde 100644
--- a/extensions/amp-story/1.0/amp-story-affiliate-link.css
+++ b/extensions/amp-story/1.0/amp-story-affiliate-link.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
  [affiliate-link-icon] {
   position: relative !important;
diff --git a/extensions/amp-story/1.0/amp-story-affiliate-link.js b/extensions/amp-story/1.0/amp-story-affiliate-link.js
index 0bc4ed9f2e0a..a7239ae33c47 100644
--- a/extensions/amp-story/1.0/amp-story-affiliate-link.js
+++ b/extensions/amp-story/1.0/amp-story-affiliate-link.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Affiliate link component that expands when clicked.
  */
diff --git a/extensions/amp-story/1.0/amp-story-base-layer.js b/extensions/amp-story/1.0/amp-story-base-layer.js
index f411014e0f1f..65d720d0b4e8 100644
--- a/extensions/amp-story/1.0/amp-story-base-layer.js
+++ b/extensions/amp-story/1.0/amp-story-base-layer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Base layer from which other layers in a story page extend from.
  */
diff --git a/extensions/amp-story/1.0/amp-story-consent.css b/extensions/amp-story/1.0/amp-story-consent.css
index 82fff11d5c69..f5a9a2feb421 100644
--- a/extensions/amp-story/1.0/amp-story-consent.css
+++ b/extensions/amp-story/1.0/amp-story-consent.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import './amp-story-shadow-reset.css';
 
diff --git a/extensions/amp-story/1.0/amp-story-consent.js b/extensions/amp-story/1.0/amp-story-consent.js
index 6a0b8864e236..b9ee72c17678 100644
--- a/extensions/amp-story/1.0/amp-story-consent.js
+++ b/extensions/amp-story/1.0/amp-story-consent.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   Action,
   StateProperty,
diff --git a/extensions/amp-story/1.0/amp-story-cta-layer.js b/extensions/amp-story/1.0/amp-story-cta-layer.js
index 42d6eef48f04..50be17f77250 100644
--- a/extensions/amp-story/1.0/amp-story-cta-layer.js
+++ b/extensions/amp-story/1.0/amp-story-cta-layer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview This is a layer that allows a call to action in a story page.
  * With this, a user could link to an external site from inside a story using
diff --git a/extensions/amp-story/1.0/amp-story-desktop-one-panel.css b/extensions/amp-story/1.0/amp-story-desktop-one-panel.css
index 379f99bcd169..40d856ad1f63 100644
--- a/extensions/amp-story/1.0/amp-story-desktop-one-panel.css
+++ b/extensions/amp-story/1.0/amp-story-desktop-one-panel.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import './amp-story-desktop-user-overridable.css';
 
diff --git a/extensions/amp-story/1.0/amp-story-desktop-one-panel.js b/extensions/amp-story/1.0/amp-story-desktop-one-panel.js
index fc4578e62f3d..81ea143467f9 100644
--- a/extensions/amp-story/1.0/amp-story-desktop-one-panel.js
+++ b/extensions/amp-story/1.0/amp-story-desktop-one-panel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isExperimentOn} from '#experiments';
 
 /**
diff --git a/extensions/amp-story/1.0/amp-story-desktop-panels.css b/extensions/amp-story/1.0/amp-story-desktop-panels.css
index f6e13ecc775d..716da4b6007d 100644
--- a/extensions/amp-story/1.0/amp-story-desktop-panels.css
+++ b/extensions/amp-story/1.0/amp-story-desktop-panels.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import './amp-story-desktop-user-overridable.css';
 
diff --git a/extensions/amp-story/1.0/amp-story-desktop-user-overridable.css b/extensions/amp-story/1.0/amp-story-desktop-user-overridable.css
index 2de18b950f16..7621147020ff 100644
--- a/extensions/amp-story/1.0/amp-story-desktop-user-overridable.css
+++ b/extensions/amp-story/1.0/amp-story-desktop-user-overridable.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 
 .i-amphtml-story-background {
diff --git a/extensions/amp-story/1.0/amp-story-draggable-drawer-header.css b/extensions/amp-story/1.0/amp-story-draggable-drawer-header.css
index 78da3fc79605..559ba96c4b58 100644
--- a/extensions/amp-story/1.0/amp-story-draggable-drawer-header.css
+++ b/extensions/amp-story/1.0/amp-story-draggable-drawer-header.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import './amp-story-shadow-reset.css';
 
diff --git a/extensions/amp-story/1.0/amp-story-draggable-drawer.css b/extensions/amp-story/1.0/amp-story-draggable-drawer.css
index 976e3206bc5f..f5ccf0d2f332 100644
--- a/extensions/amp-story/1.0/amp-story-draggable-drawer.css
+++ b/extensions/amp-story/1.0/amp-story-draggable-drawer.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .amp-story-draggable-drawer-root {
   display: block !important;
diff --git a/extensions/amp-story/1.0/amp-story-draggable-drawer.js b/extensions/amp-story/1.0/amp-story-draggable-drawer.js
index ab780d57710f..c7aa42cb5c1f 100644
--- a/extensions/amp-story/1.0/amp-story-draggable-drawer.js
+++ b/extensions/amp-story/1.0/amp-story-draggable-drawer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   Action,
   StateProperty,
diff --git a/extensions/amp-story/1.0/amp-story-embedded-component.js b/extensions/amp-story/1.0/amp-story-embedded-component.js
index d59b46f4ce3d..a4e739ab6b7c 100644
--- a/extensions/amp-story/1.0/amp-story-embedded-component.js
+++ b/extensions/amp-story/1.0/amp-story-embedded-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   Action,
   EmbeddedComponentState,
diff --git a/extensions/amp-story/1.0/amp-story-grid-layer.js b/extensions/amp-story/1.0/amp-story-grid-layer.js
index 181ed264aa4f..d15b50bc9458 100644
--- a/extensions/amp-story/1.0/amp-story-grid-layer.js
+++ b/extensions/amp-story/1.0/amp-story-grid-layer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview This is a layer that lays its children out into a grid. Its
  * implementation is based off of the CSS Grid Spec.
diff --git a/extensions/amp-story/1.0/amp-story-hint.css b/extensions/amp-story/1.0/amp-story-hint.css
index 85bd674e4a3a..046e53f0ccdf 100644
--- a/extensions/amp-story/1.0/amp-story-hint.css
+++ b/extensions/amp-story/1.0/amp-story-hint.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .i-amphtml-story-hint-container {
   transition-property: opacity !important;
diff --git a/extensions/amp-story/1.0/amp-story-hint.js b/extensions/amp-story/1.0/amp-story-hint.js
index 536ed6b17518..1f64dafc43da 100644
--- a/extensions/amp-story/1.0/amp-story-hint.js
+++ b/extensions/amp-story/1.0/amp-story-hint.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CSS} from '../../../build/amp-story-hint-1.0.css';
 import {
   EmbeddedComponentState,
diff --git a/extensions/amp-story/1.0/amp-story-info-dialog.js b/extensions/amp-story/1.0/amp-story-info-dialog.js
index 33f085eb11cd..d1c33fd9b952 100644
--- a/extensions/amp-story/1.0/amp-story-info-dialog.js
+++ b/extensions/amp-story/1.0/amp-story-info-dialog.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   ANALYTICS_TAG_NAME,
   StoryAnalyticsEvent,
diff --git a/extensions/amp-story/1.0/amp-story-localization-service.js b/extensions/amp-story/1.0/amp-story-localization-service.js
index 75cfceb1f27d..8bb2acac8b87 100644
--- a/extensions/amp-story/1.0/amp-story-localization-service.js
+++ b/extensions/amp-story/1.0/amp-story-localization-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {LocalizationService} from '#service/localization';
 import {Services} from '#service';
 import {registerServiceBuilderForDoc} from '../../../src/service-helpers';
diff --git a/extensions/amp-story/1.0/amp-story-media-query-service.js b/extensions/amp-story/1.0/amp-story-media-query-service.js
index 2d1633ab2771..f550664fb201 100644
--- a/extensions/amp-story/1.0/amp-story-media-query-service.js
+++ b/extensions/amp-story/1.0/amp-story-media-query-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {dev} from '../../../src/log';
 import {registerServiceBuilder} from '../../../src/service-helpers';
diff --git a/extensions/amp-story/1.0/amp-story-open-page-attachment.css b/extensions/amp-story/1.0/amp-story-open-page-attachment.css
index f95320e66d44..2bbb30bb4caf 100644
--- a/extensions/amp-story/1.0/amp-story-open-page-attachment.css
+++ b/extensions/amp-story/1.0/amp-story-open-page-attachment.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /**
    * Hiding the element and only showing it on the active page so the animation
diff --git a/extensions/amp-story/1.0/amp-story-open-page-attachment.js b/extensions/amp-story/1.0/amp-story-open-page-attachment.js
index 9efdfcb5a237..6d667abb906c 100644
--- a/extensions/amp-story/1.0/amp-story-open-page-attachment.js
+++ b/extensions/amp-story/1.0/amp-story-open-page-attachment.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Helper for amp-story rendering of page-attachment UI.
  */
diff --git a/extensions/amp-story/1.0/amp-story-page-attachment.css b/extensions/amp-story/1.0/amp-story-page-attachment.css
index 30da06536541..259386f4ed29 100644
--- a/extensions/amp-story/1.0/amp-story-page-attachment.css
+++ b/extensions/amp-story/1.0/amp-story-page-attachment.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /** Remote attachment styles. */
 
diff --git a/extensions/amp-story/1.0/amp-story-page-attachment.js b/extensions/amp-story/1.0/amp-story-page-attachment.js
index 33c9597fd625..3f20c0206ff0 100644
--- a/extensions/amp-story/1.0/amp-story-page-attachment.js
+++ b/extensions/amp-story/1.0/amp-story-page-attachment.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Action, StateProperty, UIType} from './amp-story-store-service';
 import {DraggableDrawer, DrawerState} from './amp-story-draggable-drawer';
 import {HistoryState, setHistoryState} from './history';
diff --git a/extensions/amp-story/1.0/amp-story-page.js b/extensions/amp-story/1.0/amp-story-page.js
index 7af9b925f0db..82a72e7e0d35 100644
--- a/extensions/amp-story/1.0/amp-story-page.js
+++ b/extensions/amp-story/1.0/amp-story-page.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Embeds a single page in a story
  *
diff --git a/extensions/amp-story/1.0/amp-story-render-service.js b/extensions/amp-story/1.0/amp-story-render-service.js
index fe4618d65678..596f788586aa 100644
--- a/extensions/amp-story/1.0/amp-story-render-service.js
+++ b/extensions/amp-story/1.0/amp-story-render-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CommonSignals} from '#core/constants/common-signals';
 import {Services} from '#service';
 import {whenUpgradedToCustomElement} from '#core/dom/amp-element-helpers';
diff --git a/extensions/amp-story/1.0/amp-story-request-service.js b/extensions/amp-story/1.0/amp-story-request-service.js
index 02f0470626d7..65ecf663f549 100644
--- a/extensions/amp-story/1.0/amp-story-request-service.js
+++ b/extensions/amp-story/1.0/amp-story-request-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {getChildJsonConfig} from '#core/dom';
 import {isProtocolValid} from '../../../src/url';
diff --git a/extensions/amp-story/1.0/amp-story-shadow-reset.css b/extensions/amp-story/1.0/amp-story-shadow-reset.css
index 9ce3003cf199..a328ce2304b1 100644
--- a/extensions/amp-story/1.0/amp-story-shadow-reset.css
+++ b/extensions/amp-story/1.0/amp-story-shadow-reset.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 :host {
   all: initial !important;
diff --git a/extensions/amp-story/1.0/amp-story-share-menu.css b/extensions/amp-story/1.0/amp-story-share-menu.css
index e45296f6aa39..feaf7d053f15 100644
--- a/extensions/amp-story/1.0/amp-story-share-menu.css
+++ b/extensions/amp-story/1.0/amp-story-share-menu.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import './amp-story-shadow-reset.css';
 @import './amp-story-share.css';
diff --git a/extensions/amp-story/1.0/amp-story-share-menu.js b/extensions/amp-story/1.0/amp-story-share-menu.js
index 2603fd7b9f80..4629460f370d 100644
--- a/extensions/amp-story/1.0/amp-story-share-menu.js
+++ b/extensions/amp-story/1.0/amp-story-share-menu.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   ANALYTICS_TAG_NAME,
   StoryAnalyticsEvent,
diff --git a/extensions/amp-story/1.0/amp-story-share.css b/extensions/amp-story/1.0/amp-story-share.css
index 485f9e9252b2..3217ccd57cb1 100644
--- a/extensions/amp-story/1.0/amp-story-share.css
+++ b/extensions/amp-story/1.0/amp-story-share.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import '../../amp-social-share/0.1/amp-social-share.css';
 
diff --git a/extensions/amp-story/1.0/amp-story-share.js b/extensions/amp-story/1.0/amp-story-share.js
index bd89b63c020a..52f05efbde21 100644
--- a/extensions/amp-story/1.0/amp-story-share.js
+++ b/extensions/amp-story/1.0/amp-story-share.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {LocalizedStringId} from '#service/localization/strings';
 import {Services} from '#service';
 import {Toast} from './toast';
diff --git a/extensions/amp-story/1.0/amp-story-store-service.js b/extensions/amp-story/1.0/amp-story-store-service.js
index fbb29e384349..d640fe4ba9ea 100644
--- a/extensions/amp-story/1.0/amp-story-store-service.js
+++ b/extensions/amp-story/1.0/amp-story-store-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {EmbedMode, parseEmbedMode} from './embed-mode';
 import {Observable} from '#core/data-structures/observable';
 import {Services} from '#service';
diff --git a/extensions/amp-story/1.0/amp-story-system-layer.css b/extensions/amp-story/1.0/amp-story-system-layer.css
index e9ae58974507..bd9dc3284df7 100644
--- a/extensions/amp-story/1.0/amp-story-system-layer.css
+++ b/extensions/amp-story/1.0/amp-story-system-layer.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import './amp-story-share.css';
 
diff --git a/extensions/amp-story/1.0/amp-story-system-layer.js b/extensions/amp-story/1.0/amp-story-system-layer.js
index 150d72b6b627..7c1749deab38 100644
--- a/extensions/amp-story/1.0/amp-story-system-layer.js
+++ b/extensions/amp-story/1.0/amp-story-system-layer.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {AMP_STORY_PLAYER_EVENT} from '../../../src/amp-story-player/amp-story-player-impl';
 import {
   Action,
diff --git a/extensions/amp-story/1.0/amp-story-templates.css b/extensions/amp-story/1.0/amp-story-templates.css
index d8745c435649..180585a0624b 100644
--- a/extensions/amp-story/1.0/amp-story-templates.css
+++ b/extensions/amp-story/1.0/amp-story-templates.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /**
  * position="landscape-half-left" template.
diff --git a/extensions/amp-story/1.0/amp-story-tooltip.css b/extensions/amp-story/1.0/amp-story-tooltip.css
index f4086d7145b7..2d22aadc3cc4 100644
--- a/extensions/amp-story/1.0/amp-story-tooltip.css
+++ b/extensions/amp-story/1.0/amp-story-tooltip.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .i-amphtml-story-focused-state-layer {
   top: 0 !important;
diff --git a/extensions/amp-story/1.0/amp-story-unsupported-browser-layer.css b/extensions/amp-story/1.0/amp-story-unsupported-browser-layer.css
index 85c911a7b19f..4fbaaa248c85 100644
--- a/extensions/amp-story/1.0/amp-story-unsupported-browser-layer.css
+++ b/extensions/amp-story/1.0/amp-story-unsupported-browser-layer.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .i-amphtml-story-unsupported-browser-overlay {
   position: absolute !important;
diff --git a/extensions/amp-story/1.0/amp-story-unsupported-browser-layer.js b/extensions/amp-story/1.0/amp-story-unsupported-browser-layer.js
index ff86c55355ef..2a36840a8b37 100644
--- a/extensions/amp-story/1.0/amp-story-unsupported-browser-layer.js
+++ b/extensions/amp-story/1.0/amp-story-unsupported-browser-layer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Action, getStoreService} from './amp-story-store-service';
 import {CSS} from '../../../build/amp-story-unsupported-browser-layer-1.0.css';
 import {LocalizedStringId} from '#service/localization/strings';
diff --git a/extensions/amp-story/1.0/amp-story-user-overridable.css b/extensions/amp-story/1.0/amp-story-user-overridable.css
index 5093afddbd1c..7ce704958f73 100644
--- a/extensions/amp-story/1.0/amp-story-user-overridable.css
+++ b/extensions/amp-story/1.0/amp-story-user-overridable.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-story {
   font-display: optional;
diff --git a/extensions/amp-story/1.0/amp-story-vertical.css b/extensions/amp-story/1.0/amp-story-vertical.css
index 7aaf94739846..b51ba2e14635 100644
--- a/extensions/amp-story/1.0/amp-story-vertical.css
+++ b/extensions/amp-story/1.0/amp-story-vertical.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /**
  * Vertical scrolling rendering, so the pages are visible to search engine
diff --git a/extensions/amp-story/1.0/amp-story-viewer-messaging-handler.js b/extensions/amp-story/1.0/amp-story-viewer-messaging-handler.js
index dd13d0bd8188..3055fc06efcb 100644
--- a/extensions/amp-story/1.0/amp-story-viewer-messaging-handler.js
+++ b/extensions/amp-story/1.0/amp-story-viewer-messaging-handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   Action,
   StateProperty,
diff --git a/extensions/amp-story/1.0/amp-story-viewport-warning-layer.css b/extensions/amp-story/1.0/amp-story-viewport-warning-layer.css
index f722f7ab0742..6d5eb2eb383a 100644
--- a/extensions/amp-story/1.0/amp-story-viewport-warning-layer.css
+++ b/extensions/amp-story/1.0/amp-story-viewport-warning-layer.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import './amp-story-shadow-reset.css';
 
diff --git a/extensions/amp-story/1.0/amp-story-viewport-warning-layer.js b/extensions/amp-story/1.0/amp-story-viewport-warning-layer.js
index 49ad418c537a..f142485e096d 100644
--- a/extensions/amp-story/1.0/amp-story-viewport-warning-layer.js
+++ b/extensions/amp-story/1.0/amp-story-viewport-warning-layer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CSS} from '../../../build/amp-story-viewport-warning-layer-1.0.css';
 import {LocalizedStringId} from '#service/localization/strings';
 import {Services} from '#service';
diff --git a/extensions/amp-story/1.0/amp-story.css b/extensions/amp-story/1.0/amp-story.css
index d7eb721581e5..e67af7edf46d 100644
--- a/extensions/amp-story/1.0/amp-story.css
+++ b/extensions/amp-story/1.0/amp-story.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import './amp-story-access.css';
 @import './amp-story-affiliate-link.css';
diff --git a/extensions/amp-story/1.0/amp-story.js b/extensions/amp-story/1.0/amp-story.js
index c659bf0945e7..fcff27541397 100644
--- a/extensions/amp-story/1.0/amp-story.js
+++ b/extensions/amp-story/1.0/amp-story.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Embeds a story
  *
diff --git a/extensions/amp-story/1.0/animation-presets-utils.js b/extensions/amp-story/1.0/animation-presets-utils.js
index 5327fb5048e3..c309265f5924 100644
--- a/extensions/amp-story/1.0/animation-presets-utils.js
+++ b/extensions/amp-story/1.0/animation-presets-utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Common animations utility functions used in the animation
  * presets.
diff --git a/extensions/amp-story/1.0/animation-presets.js b/extensions/amp-story/1.0/animation-presets.js
index 55fba013f037..8c50ff0e9eb4 100644
--- a/extensions/amp-story/1.0/animation-presets.js
+++ b/extensions/amp-story/1.0/animation-presets.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {GRID_LAYER_TEMPLATE_CLASS_NAMES} from './amp-story-grid-layer';
 import {StoryAnimationPresetDef} from './animation-types';
 import {
diff --git a/extensions/amp-story/1.0/animation-types.js b/extensions/amp-story/1.0/animation-types.js
index 7fe50be5c554..762fd7b582e3 100644
--- a/extensions/amp-story/1.0/animation-types.js
+++ b/extensions/amp-story/1.0/animation-types.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   WebAnimationBuilderOptionsDef,
   WebAnimationDef,
diff --git a/extensions/amp-story/1.0/animation.js b/extensions/amp-story/1.0/animation.js
index 4dcb63938580..12a96c5ba436 100644
--- a/extensions/amp-story/1.0/animation.js
+++ b/extensions/amp-story/1.0/animation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {
   PRESET_OPTION_ATTRIBUTES,
diff --git a/extensions/amp-story/1.0/audio.js b/extensions/amp-story/1.0/audio.js
index 0b1937eea1a4..f4d47cb637aa 100644
--- a/extensions/amp-story/1.0/audio.js
+++ b/extensions/amp-story/1.0/audio.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 /**
diff --git a/extensions/amp-story/1.0/background-blur.js b/extensions/amp-story/1.0/background-blur.js
index fab34e5fee82..f15c898918f6 100644
--- a/extensions/amp-story/1.0/background-blur.js
+++ b/extensions/amp-story/1.0/background-blur.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CommonSignals} from '#core/constants/common-signals';
 import {scopedQuerySelectorAll} from '#core/dom/query';
 import {setImportantStyles} from '#core/dom/style';
diff --git a/extensions/amp-story/1.0/development-ui.js b/extensions/amp-story/1.0/development-ui.js
index aff28fb53852..7fefd5ce8800 100644
--- a/extensions/amp-story/1.0/development-ui.js
+++ b/extensions/amp-story/1.0/development-ui.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {LogLevel, dev} from '../../../src/log';
 import {Services} from '#service';
 import {isArray} from '#core/types';
diff --git a/extensions/amp-story/1.0/embed-mode.js b/extensions/amp-story/1.0/embed-mode.js
index d533fd3c0af3..634df5079973 100644
--- a/extensions/amp-story/1.0/embed-mode.js
+++ b/extensions/amp-story/1.0/embed-mode.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {isEnumValue} from '#core/types';
 import {parseQueryString} from '#core/types/string/url';
 
diff --git a/extensions/amp-story/1.0/events.js b/extensions/amp-story/1.0/events.js
index 6ff92200e889..1e818a27c26d 100644
--- a/extensions/amp-story/1.0/events.js
+++ b/extensions/amp-story/1.0/events.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createCustomEvent} from '../../../src/event-helper';
 
 /** @const {!Object<string, string>} */
diff --git a/extensions/amp-story/1.0/history.js b/extensions/amp-story/1.0/history.js
index c88acda84688..780edf5b99cf 100644
--- a/extensions/amp-story/1.0/history.js
+++ b/extensions/amp-story/1.0/history.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 import {getHistoryState as getWindowHistoryState} from '#core/window/history';
 import {parseJson} from '#core/types/object/json';
diff --git a/extensions/amp-story/1.0/jsonld.js b/extensions/amp-story/1.0/jsonld.js
index 8e5b0c42a32b..e631ac12e220 100644
--- a/extensions/amp-story/1.0/jsonld.js
+++ b/extensions/amp-story/1.0/jsonld.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isJsonLdScriptTag} from '#core/dom';
 import {tryParseJson} from '#core/types/object/json';
 import {user} from '../../../src/log';
diff --git a/extensions/amp-story/1.0/live-story-manager.js b/extensions/amp-story/1.0/live-story-manager.js
index 9f7a2efac628..3398f90e0e6b 100644
--- a/extensions/amp-story/1.0/live-story-manager.js
+++ b/extensions/amp-story/1.0/live-story-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Action, getStoreService} from './amp-story-store-service';
 import {CommonSignals} from '#core/constants/common-signals';
 import {Services} from '#service';
diff --git a/extensions/amp-story/1.0/loading-spinner.js b/extensions/amp-story/1.0/loading-spinner.js
index be91eb38cb4e..ccf4c7f14db7 100644
--- a/extensions/amp-story/1.0/loading-spinner.js
+++ b/extensions/amp-story/1.0/loading-spinner.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {dev} from '../../../src/log';
 import {dict} from '#core/types/object';
 import {renderAsElement} from './simple-template';
diff --git a/extensions/amp-story/1.0/logging.js b/extensions/amp-story/1.0/logging.js
index 7aa71280033f..61c9b015bd75 100644
--- a/extensions/amp-story/1.0/logging.js
+++ b/extensions/amp-story/1.0/logging.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {LogLevel, devAssert} from '../../../src/log';
 import {scopedQuerySelectorAll} from '#core/dom/query';
 import {tryResolve} from '#core/data-structures/promise';
diff --git a/extensions/amp-story/1.0/media-performance-metrics-service.js b/extensions/amp-story/1.0/media-performance-metrics-service.js
index 315675873434..f7571fb3ef32 100644
--- a/extensions/amp-story/1.0/media-performance-metrics-service.js
+++ b/extensions/amp-story/1.0/media-performance-metrics-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   MEDIA_LOAD_FAILURE_SRC_PROPERTY,
   listen,
diff --git a/extensions/amp-story/1.0/media-pool.js b/extensions/amp-story/1.0/media-pool.js
index 27e8120fe87b..615429fca16e 100644
--- a/extensions/amp-story/1.0/media-pool.js
+++ b/extensions/amp-story/1.0/media-pool.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   BlessTask,
   ELEMENT_BLESSED_PROPERTY_NAME,
diff --git a/extensions/amp-story/1.0/media-tasks.js b/extensions/amp-story/1.0/media-tasks.js
index 278bbdd56f24..f5e02af35932 100644
--- a/extensions/amp-story/1.0/media-tasks.js
+++ b/extensions/amp-story/1.0/media-tasks.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred, tryResolve} from '#core/data-structures/promise';
 import {Sources} from './sources';
 import {isConnectedNode} from '#core/dom';
diff --git a/extensions/amp-story/1.0/page-advancement.js b/extensions/amp-story/1.0/page-advancement.js
index b9b8c3bcb051..7a9eaa1a0ee8 100644
--- a/extensions/amp-story/1.0/page-advancement.js
+++ b/extensions/amp-story/1.0/page-advancement.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {AFFILIATE_LINK_SELECTOR} from './amp-story-affiliate-link';
 import {
   Action,
diff --git a/extensions/amp-story/1.0/pagination-buttons.css b/extensions/amp-story/1.0/pagination-buttons.css
index c8ede0d42ad7..dbc66aa334e8 100644
--- a/extensions/amp-story/1.0/pagination-buttons.css
+++ b/extensions/amp-story/1.0/pagination-buttons.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * In desktop panel mode i-amphtml-story-button-container acts as a sentinel
diff --git a/extensions/amp-story/1.0/pagination-buttons.js b/extensions/amp-story/1.0/pagination-buttons.js
index 2f10b3426b64..5cae566e0ac0 100644
--- a/extensions/amp-story/1.0/pagination-buttons.js
+++ b/extensions/amp-story/1.0/pagination-buttons.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {
   Action,
   StateProperty,
diff --git a/extensions/amp-story/1.0/prerender-active-page.js b/extensions/amp-story/1.0/prerender-active-page.js
index cbd65463b326..da543730eb69 100644
--- a/extensions/amp-story/1.0/prerender-active-page.js
+++ b/extensions/amp-story/1.0/prerender-active-page.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {escapeCssSelectorIdent} from '#core/dom/css-selectors';
 import {parseQueryString} from '#core/types/string/url';
 import {toWin} from '#core/window';
diff --git a/extensions/amp-story/1.0/progress-bar.js b/extensions/amp-story/1.0/progress-bar.js
index cdda96cd62d0..575ed8d24864 100644
--- a/extensions/amp-story/1.0/progress-bar.js
+++ b/extensions/amp-story/1.0/progress-bar.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {
   BranchToTimeValues,
   StoryAdSegmentExp,
diff --git a/extensions/amp-story/1.0/semantic-render.js b/extensions/amp-story/1.0/semantic-render.js
index f060781dfdc0..6a0a44284e9a 100644
--- a/extensions/amp-story/1.0/semantic-render.js
+++ b/extensions/amp-story/1.0/semantic-render.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {createElementWithAttributes} from '#core/dom';
 import {dev} from '../../../src/log';
diff --git a/extensions/amp-story/1.0/simple-template.js b/extensions/amp-story/1.0/simple-template.js
index 446d86a433d3..844f888e9759 100644
--- a/extensions/amp-story/1.0/simple-template.js
+++ b/extensions/amp-story/1.0/simple-template.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {LocalizedStringId} from '#service/localization/strings'; // eslint-disable-line no-unused-vars
 import {createElementWithAttributes} from '#core/dom';
 import {devAssert} from '../../../src/log';
diff --git a/extensions/amp-story/1.0/sources.js b/extensions/amp-story/1.0/sources.js
index 27f02eddab85..73b2fa0e8acf 100644
--- a/extensions/amp-story/1.0/sources.js
+++ b/extensions/amp-story/1.0/sources.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ampMediaElementFor} from './utils';
 import {removeElement} from '#core/dom';
 import {toArray} from '#core/types/array';
diff --git a/extensions/amp-story/1.0/story-analytics.js b/extensions/amp-story/1.0/story-analytics.js
index 420c992dd1af..4588d2f6c710 100644
--- a/extensions/amp-story/1.0/story-analytics.js
+++ b/extensions/amp-story/1.0/story-analytics.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Services} from '#service';
 import {StateProperty, getStoreService} from './amp-story-store-service';
 import {getDataParamsFromAttributes} from '#core/dom';
diff --git a/extensions/amp-story/1.0/test-e2e/test-amp-story-share-menu.js b/extensions/amp-story/1.0/test-e2e/test-amp-story-share-menu.js
index 2d7e241aa768..e1cb47960b1f 100644
--- a/extensions/amp-story/1.0/test-e2e/test-amp-story-share-menu.js
+++ b/extensions/amp-story/1.0/test-e2e/test-amp-story-share-menu.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Key} from '#testing/helpers/types';
 import {sleep} from '#testing/helpers';
 
diff --git a/extensions/amp-story/1.0/test/integration/test-amp-story-affiliate-link.js b/extensions/amp-story/1.0/test/integration/test-amp-story-affiliate-link.js
index 33ed4f83d3af..ebda323751f6 100644
--- a/extensions/amp-story/1.0/test/integration/test-amp-story-affiliate-link.js
+++ b/extensions/amp-story/1.0/test/integration/test-amp-story-affiliate-link.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BrowserController, RequestBank} from '#testing/test-helper';
 
 const t = describes.sandboxed.configure().skipSafari().skipEdge();
diff --git a/extensions/amp-story/1.0/test/test-amp-story-access.js b/extensions/amp-story/1.0/test/test-amp-story-access.js
index ca64a6fe4528..cedb04eeb547 100644
--- a/extensions/amp-story/1.0/test/test-amp-story-access.js
+++ b/extensions/amp-story/1.0/test/test-amp-story-access.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   Action,
   AmpStoryStoreService,
diff --git a/extensions/amp-story/1.0/test/test-amp-story-consent.js b/extensions/amp-story/1.0/test/test-amp-story-consent.js
index 4fc61453b709..8c24ca81382b 100644
--- a/extensions/amp-story/1.0/test/test-amp-story-consent.js
+++ b/extensions/amp-story/1.0/test/test-amp-story-consent.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpStoryConsent} from '../amp-story-consent';
 import {AmpStoryStoreService, StateProperty} from '../amp-story-store-service';
 import {LocalizationService} from '#service/localization';
diff --git a/extensions/amp-story/1.0/test/test-amp-story-cta-layer.js b/extensions/amp-story/1.0/test/test-amp-story-cta-layer.js
index 090a431737ca..d8d53096cece 100644
--- a/extensions/amp-story/1.0/test/test-amp-story-cta-layer.js
+++ b/extensions/amp-story/1.0/test/test-amp-story-cta-layer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpStoryCtaLayer} from '../amp-story-cta-layer';
 import {registerServiceBuilder} from '../../../../src/service-helpers';
 
diff --git a/extensions/amp-story/1.0/test/test-amp-story-embedded-component.js b/extensions/amp-story/1.0/test/test-amp-story-embedded-component.js
index 5732597f3ea2..cfe8af623102 100644
--- a/extensions/amp-story/1.0/test/test-amp-story-embedded-component.js
+++ b/extensions/amp-story/1.0/test/test-amp-story-embedded-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as analyticsApi from '../../../../src/analytics';
 import {
   Action,
diff --git a/extensions/amp-story/1.0/test/test-amp-story-grid-layer.js b/extensions/amp-story/1.0/test/test-amp-story-grid-layer.js
index b00a035428fb..96e73482c31d 100644
--- a/extensions/amp-story/1.0/test/test-amp-story-grid-layer.js
+++ b/extensions/amp-story/1.0/test/test-amp-story-grid-layer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Action, AmpStoryStoreService} from '../amp-story-store-service';
 import {AmpDocSingle} from '#service/ampdoc-impl';
 import {AmpStoryGridLayer} from '../amp-story-grid-layer';
diff --git a/extensions/amp-story/1.0/test/test-amp-story-hint.js b/extensions/amp-story/1.0/test/test-amp-story-hint.js
index d720f73efae2..60d526a7744d 100644
--- a/extensions/amp-story/1.0/test/test-amp-story-hint.js
+++ b/extensions/amp-story/1.0/test/test-amp-story-hint.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpStoryHint} from '../amp-story-hint';
 import {AmpStoryStoreService} from '../amp-story-store-service';
 import {LocalizationService} from '#service/localization';
diff --git a/extensions/amp-story/1.0/test/test-amp-story-info-dialog.js b/extensions/amp-story/1.0/test/test-amp-story-info-dialog.js
index 58432f7191c9..f8fc1abf3c7a 100644
--- a/extensions/amp-story/1.0/test/test-amp-story-info-dialog.js
+++ b/extensions/amp-story/1.0/test/test-amp-story-info-dialog.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   Action,
   AmpStoryStoreService,
diff --git a/extensions/amp-story/1.0/test/test-amp-story-localization-strings.js b/extensions/amp-story/1.0/test/test-amp-story-localization-strings.js
index 8afc4ac9859f..05cd3c11fe1b 100644
--- a/extensions/amp-story/1.0/test/test-amp-story-localization-strings.js
+++ b/extensions/amp-story/1.0/test/test-amp-story-localization-strings.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {LocalizedStringId} from '#service/localization/strings';
 import localesObjs from '../_locales';
 
diff --git a/extensions/amp-story/1.0/test/test-amp-story-media-query-service.js b/extensions/amp-story/1.0/test/test-amp-story-media-query-service.js
index 2a78a22550ed..aef29488e0a9 100644
--- a/extensions/amp-story/1.0/test/test-amp-story-media-query-service.js
+++ b/extensions/amp-story/1.0/test/test-amp-story-media-query-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpStoryMediaQueryService} from '../amp-story-media-query-service';
 import {poll} from '#testing/iframe';
 import {afterRenderPromise} from '#testing/helpers';
diff --git a/extensions/amp-story/1.0/test/test-amp-story-page.js b/extensions/amp-story/1.0/test/test-amp-story-page.js
index dbba10680e93..2a1e058acf13 100644
--- a/extensions/amp-story/1.0/test/test-amp-story-page.js
+++ b/extensions/amp-story/1.0/test/test-amp-story-page.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as VideoUtils from '#core/dom/video';
 import {Action, AmpStoryStoreService} from '../amp-story-store-service';
 import {AmpAudio} from '../../../amp-audio/0.1/amp-audio';
diff --git a/extensions/amp-story/1.0/test/test-amp-story-progress-bar.js b/extensions/amp-story/1.0/test/test-amp-story-progress-bar.js
index 7836cdffad6d..e606eb5cd0b9 100644
--- a/extensions/amp-story/1.0/test/test-amp-story-progress-bar.js
+++ b/extensions/amp-story/1.0/test/test-amp-story-progress-bar.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Action, getStoreService} from '../amp-story-store-service';
 import {ProgressBar} from '../progress-bar';
 import {Services} from '#service';
diff --git a/extensions/amp-story/1.0/test/test-amp-story-request-service.js b/extensions/amp-story/1.0/test/test-amp-story-request-service.js
index 8897b3957f55..718c824002fd 100644
--- a/extensions/amp-story/1.0/test/test-amp-story-request-service.js
+++ b/extensions/amp-story/1.0/test/test-amp-story-request-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   AmpStoryRequestService,
   CONFIG_SRC_ATTRIBUTE_NAME,
diff --git a/extensions/amp-story/1.0/test/test-amp-story-share-menu.js b/extensions/amp-story/1.0/test/test-amp-story-share-menu.js
index 283320759caa..776681253ae6 100644
--- a/extensions/amp-story/1.0/test/test-amp-story-share-menu.js
+++ b/extensions/amp-story/1.0/test/test-amp-story-share-menu.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   Action,
   AmpStoryStoreService,
diff --git a/extensions/amp-story/1.0/test/test-amp-story-store-service.js b/extensions/amp-story/1.0/test/test-amp-story-store-service.js
index 424553434640..90db07c4a440 100644
--- a/extensions/amp-story/1.0/test/test-amp-story-store-service.js
+++ b/extensions/amp-story/1.0/test/test-amp-story-store-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   Action,
   AmpStoryStoreService,
diff --git a/extensions/amp-story/1.0/test/test-amp-story-system-layer.js b/extensions/amp-story/1.0/test/test-amp-story-system-layer.js
index a07ad6e3d764..b9aeca19d53f 100644
--- a/extensions/amp-story/1.0/test/test-amp-story-system-layer.js
+++ b/extensions/amp-story/1.0/test/test-amp-story-system-layer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   Action,
   AmpStoryStoreService,
diff --git a/extensions/amp-story/1.0/test/test-amp-story-viewer-messaging-handler.js b/extensions/amp-story/1.0/test/test-amp-story-viewer-messaging-handler.js
index 153e9a779b53..162da6e7890e 100644
--- a/extensions/amp-story/1.0/test/test-amp-story-viewer-messaging-handler.js
+++ b/extensions/amp-story/1.0/test/test-amp-story-viewer-messaging-handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   Action,
   StateProperty,
diff --git a/extensions/amp-story/1.0/test/test-amp-story.js b/extensions/amp-story/1.0/test/test-amp-story.js
index 6415849388fa..6bc08ac2a35b 100644
--- a/extensions/amp-story/1.0/test/test-amp-story.js
+++ b/extensions/amp-story/1.0/test/test-amp-story.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as consent from '../../../../src/consent';
 import * as utils from '../utils';
 import {
diff --git a/extensions/amp-story/1.0/test/test-analytics.js b/extensions/amp-story/1.0/test/test-analytics.js
index 7569ff51c9a7..e20c224991b5 100644
--- a/extensions/amp-story/1.0/test/test-analytics.js
+++ b/extensions/amp-story/1.0/test/test-analytics.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Action, getStoreService} from '../amp-story-store-service';
 import {getAnalyticsService} from '../story-analytics';
 import {installDocService} from '#service/ampdoc-impl';
diff --git a/extensions/amp-story/1.0/test/test-animation.js b/extensions/amp-story/1.0/test/test-animation.js
index 308a50de4c25..08df16269131 100644
--- a/extensions/amp-story/1.0/test/test-animation.js
+++ b/extensions/amp-story/1.0/test/test-animation.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {AmpDocSingle} from '#service/ampdoc-impl';
 import {
   AnimationManager,
diff --git a/extensions/amp-story/1.0/test/test-full-bleed-animations.js b/extensions/amp-story/1.0/test/test-full-bleed-animations.js
index c8ea85e3a56f..619513f336e0 100644
--- a/extensions/amp-story/1.0/test/test-full-bleed-animations.js
+++ b/extensions/amp-story/1.0/test/test-full-bleed-animations.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Tests full-bleed animations like panning and zooming.
  */
diff --git a/extensions/amp-story/1.0/test/test-history.js b/extensions/amp-story/1.0/test/test-history.js
index 95d08c1665a1..b03701e02227 100644
--- a/extensions/amp-story/1.0/test/test-history.js
+++ b/extensions/amp-story/1.0/test/test-history.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {LOCAL_STORAGE_KEY, getHistoryState, setHistoryState} from '../history';
 import {loadPromise} from '../../../../src/event-helper';
 import {removeElement} from '#core/dom';
diff --git a/extensions/amp-story/1.0/test/test-live-story-manager.js b/extensions/amp-story/1.0/test/test-live-story-manager.js
index 40a39c90e1d0..1874e3d4f9fc 100644
--- a/extensions/amp-story/1.0/test/test-live-story-manager.js
+++ b/extensions/amp-story/1.0/test/test-live-story-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Action} from '../amp-story-store-service';
 import {AmpStory} from '../amp-story';
 import {AmpStoryPage} from '../amp-story-page';
diff --git a/extensions/amp-story/1.0/test/test-loading-spinner.js b/extensions/amp-story/1.0/test/test-loading-spinner.js
index 0741e065ac23..693fc9694e84 100644
--- a/extensions/amp-story/1.0/test/test-loading-spinner.js
+++ b/extensions/amp-story/1.0/test/test-loading-spinner.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {LoadingSpinner} from '../loading-spinner';
 
 describes.realWin('loading-spinner', {}, (env) => {
diff --git a/extensions/amp-story/1.0/test/test-media-performance-metrics-service.js b/extensions/amp-story/1.0/test/test-media-performance-metrics-service.js
index e96b5cb448e5..ca2e73913f00 100644
--- a/extensions/amp-story/1.0/test/test-media-performance-metrics-service.js
+++ b/extensions/amp-story/1.0/test/test-media-performance-metrics-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 import {MEDIA_LOAD_FAILURE_SRC_PROPERTY} from '../../../../src/event-helper';
 import {MediaPerformanceMetricsService} from '../media-performance-metrics-service';
diff --git a/extensions/amp-story/1.0/test/test-media-pool.js b/extensions/amp-story/1.0/test/test-media-pool.js
index 84dad69a5377..b3983dd37bcc 100644
--- a/extensions/amp-story/1.0/test/test-media-pool.js
+++ b/extensions/amp-story/1.0/test/test-media-pool.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {MediaPool, MediaType} from '../media-pool';
 import {Services} from '#service';
 import {findIndex} from '#core/types/array';
diff --git a/extensions/amp-story/1.0/test/test-media-tasks.js b/extensions/amp-story/1.0/test/test-media-tasks.js
index f909af458e3a..c4f62f4ecf03 100644
--- a/extensions/amp-story/1.0/test/test-media-tasks.js
+++ b/extensions/amp-story/1.0/test/test-media-tasks.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {
   LoadTask,
   MuteTask,
diff --git a/extensions/amp-story/1.0/test/test-page-advancement.js b/extensions/amp-story/1.0/test/test-page-advancement.js
index a9c9e8ee660c..29dbcbc7fd97 100644
--- a/extensions/amp-story/1.0/test/test-page-advancement.js
+++ b/extensions/amp-story/1.0/test/test-page-advancement.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   AdvancementConfig,
   ManualAdvancement,
diff --git a/extensions/amp-story/1.0/test/test-semantic-render.js b/extensions/amp-story/1.0/test/test-semantic-render.js
index 4e4540beda56..e60dc7fab7ab 100644
--- a/extensions/amp-story/1.0/test/test-semantic-render.js
+++ b/extensions/amp-story/1.0/test/test-semantic-render.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {extractTextContent} from '../semantic-render';
 
 describes.fakeWin('amp-story semantic-render', {}, () => {
diff --git a/extensions/amp-story/1.0/test/test-story-analytics.js b/extensions/amp-story/1.0/test/test-story-analytics.js
index 4d2a1d23c614..56c7ad0cf1c7 100644
--- a/extensions/amp-story/1.0/test/test-story-analytics.js
+++ b/extensions/amp-story/1.0/test/test-story-analytics.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as analytics from '../../../../src/analytics';
 import {Action, getStoreService} from '../amp-story-store-service';
 import {StoryAnalyticsService} from '../story-analytics';
diff --git a/extensions/amp-story/1.0/test/test-utils.js b/extensions/amp-story/1.0/test/test-utils.js
index 6ff875f71359..89e61d8cf5cc 100644
--- a/extensions/amp-story/1.0/test/test-utils.js
+++ b/extensions/amp-story/1.0/test/test-utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {StateProperty} from '../amp-story-store-service';
 import {
   getRGBFromCssColorValue,
diff --git a/extensions/amp-story/1.0/test/test-variable-service.js b/extensions/amp-story/1.0/test/test-variable-service.js
index 1b75cbffa4bd..d8a135c224c3 100644
--- a/extensions/amp-story/1.0/test/test-variable-service.js
+++ b/extensions/amp-story/1.0/test/test-variable-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Action, getStoreService} from '../amp-story-store-service';
 import {AdvancementMode} from '../story-analytics';
 import {AnalyticsVariable, getVariableService} from '../variable-service';
diff --git a/extensions/amp-story/1.0/toast.js b/extensions/amp-story/1.0/toast.js
index ace4d61f4150..93d57ef3fbe8 100644
--- a/extensions/amp-story/1.0/toast.js
+++ b/extensions/amp-story/1.0/toast.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Services} from '#service';
 import {createElementWithAttributes, removeElement} from '#core/dom';
 import {toWin} from '#core/window';
diff --git a/extensions/amp-story/1.0/utils.js b/extensions/amp-story/1.0/utils.js
index ba0cbe628e3e..7b132d38fd71 100644
--- a/extensions/amp-story/1.0/utils.js
+++ b/extensions/amp-story/1.0/utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {StateProperty} from './amp-story-store-service';
 import {
diff --git a/extensions/amp-story/1.0/variable-service.js b/extensions/amp-story/1.0/variable-service.js
index d32ecb6dd099..8145cbb0438c 100644
--- a/extensions/amp-story/1.0/variable-service.js
+++ b/extensions/amp-story/1.0/variable-service.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Services} from '#service';
 import {StateProperty, getStoreService} from './amp-story-store-service';
 import {dict} from '#core/types/object';
diff --git a/extensions/amp-story/amp-story-analytics.md b/extensions/amp-story/amp-story-analytics.md
index 2555ec9420db..14e4baf7ef56 100644
--- a/extensions/amp-story/amp-story-analytics.md
+++ b/extensions/amp-story/amp-story-analytics.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP Story and Analytics
 
 This document details triggers associated with AMP Stories. If you're looking for a guide to setting up analytics for your AMP pages, see [this blog post](https://blog.amp.dev/2019/08/28/analytics-for-your-amp-stories/)
diff --git a/extensions/amp-stream-gallery/0.1/amp-stream-gallery.css b/extensions/amp-stream-gallery/0.1/amp-stream-gallery.css
index bef1b8eea3c1..42f3c181cb69 100644
--- a/extensions/amp-stream-gallery/0.1/amp-stream-gallery.css
+++ b/extensions/amp-stream-gallery/0.1/amp-stream-gallery.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import "../../amp-base-carousel/0.1/carousel.css";
 @import "arrows.css";
diff --git a/extensions/amp-stream-gallery/0.1/amp-stream-gallery.js b/extensions/amp-stream-gallery/0.1/amp-stream-gallery.js
index 01d0bb7af416..f0ee952a8776 100644
--- a/extensions/amp-stream-gallery/0.1/amp-stream-gallery.js
+++ b/extensions/amp-stream-gallery/0.1/amp-stream-gallery.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionSource} from '../../amp-base-carousel/0.1/action-source';
 import {ActionTrust} from '#core/constants/action-constants';
 import {CSS} from '../../../build/amp-stream-gallery-0.1.css';
diff --git a/extensions/amp-stream-gallery/0.1/arrows.css b/extensions/amp-stream-gallery/0.1/arrows.css
index cac714c2805b..6fba1326c507 100644
--- a/extensions/amp-stream-gallery/0.1/arrows.css
+++ b/extensions/amp-stream-gallery/0.1/arrows.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import "inset-arrows.css";
 @import "outset-arrows.css";
diff --git a/extensions/amp-stream-gallery/0.1/inset-arrows.css b/extensions/amp-stream-gallery/0.1/inset-arrows.css
index 6058b96c1f21..25c9a55c398e 100644
--- a/extensions/amp-stream-gallery/0.1/inset-arrows.css
+++ b/extensions/amp-stream-gallery/0.1/inset-arrows.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 :not([amp-stream-gallery-outset-arrows]) > .i-amphtml-stream-gallery-arrow-prev-slot {
   width: 0;
diff --git a/extensions/amp-stream-gallery/0.1/outset-arrows.css b/extensions/amp-stream-gallery/0.1/outset-arrows.css
index 0a103bf5cd9c..d58244b22ff7 100644
--- a/extensions/amp-stream-gallery/0.1/outset-arrows.css
+++ b/extensions/amp-stream-gallery/0.1/outset-arrows.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 [amp-stream-gallery-outset-arrows] > .i-amphtml-stream-gallery-arrow-prev-slot > [disabled],
 [amp-stream-gallery-outset-arrows] > .i-amphtml-stream-gallery-arrow-next-slot > [disabled] {
diff --git a/extensions/amp-stream-gallery/0.1/test/test-amp-stream-gallery.js b/extensions/amp-stream-gallery/0.1/test/test-amp-stream-gallery.js
index 405e3d364187..11dcbf225c90 100644
--- a/extensions/amp-stream-gallery/0.1/test/test-amp-stream-gallery.js
+++ b/extensions/amp-stream-gallery/0.1/test/test-amp-stream-gallery.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-stream-gallery';
 import {CarouselEvents} from '../../../amp-base-carousel/0.1/carousel-events';
 import {getDetail, listenOncePromise} from '../../../../src/event-helper';
diff --git a/extensions/amp-stream-gallery/1.0/amp-stream-gallery.css b/extensions/amp-stream-gallery/1.0/amp-stream-gallery.css
index d16f39f9275e..c0299e5e4343 100644
--- a/extensions/amp-stream-gallery/1.0/amp-stream-gallery.css
+++ b/extensions/amp-stream-gallery/1.0/amp-stream-gallery.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * Pre-upgrade:
diff --git a/extensions/amp-stream-gallery/1.0/amp-stream-gallery.js b/extensions/amp-stream-gallery/1.0/amp-stream-gallery.js
index 0e04526dafb6..d27c223ea4fb 100644
--- a/extensions/amp-stream-gallery/1.0/amp-stream-gallery.js
+++ b/extensions/amp-stream-gallery/1.0/amp-stream-gallery.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {BaseElement} from './base-element';
 import {CSS} from '../../../build/amp-stream-gallery-1.0.css';
diff --git a/extensions/amp-stream-gallery/1.0/base-element.js b/extensions/amp-stream-gallery/1.0/base-element.js
index 35c47b2b1de5..805f07dec508 100644
--- a/extensions/amp-stream-gallery/1.0/base-element.js
+++ b/extensions/amp-stream-gallery/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CSS as CAROUSEL_CSS} from '../../amp-base-carousel/1.0/component.jss';
 import {CSS as GALLERY_CSS} from './component.jss';
 import {PreactBaseElement} from '#preact/base-element';
diff --git a/extensions/amp-stream-gallery/1.0/component.js b/extensions/amp-stream-gallery/1.0/component.js
index 84234646cefb..0681c227cdf4 100644
--- a/extensions/amp-stream-gallery/1.0/component.js
+++ b/extensions/amp-stream-gallery/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {BaseCarousel} from '../../amp-base-carousel/1.0/component';
 import {forwardRef} from '#preact/compat';
diff --git a/extensions/amp-stream-gallery/1.0/component.jss.js b/extensions/amp-stream-gallery/1.0/component.jss.js
index cb067829fc35..0d745792e90c 100644
--- a/extensions/amp-stream-gallery/1.0/component.jss.js
+++ b/extensions/amp-stream-gallery/1.0/component.jss.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createUseStyles} from 'react-jss';
 
 const gallery = {
diff --git a/extensions/amp-stream-gallery/1.0/component.type.js b/extensions/amp-stream-gallery/1.0/component.type.js
index 92e904e5b025..8c4813f08fed 100644
--- a/extensions/amp-stream-gallery/1.0/component.type.js
+++ b/extensions/amp-stream-gallery/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-stream-gallery/1.0/storybook/Basic.amp.js b/extensions/amp-stream-gallery/1.0/storybook/Basic.amp.js
index 3f4a7f426a8e..e71b3bc85ec7 100644
--- a/extensions/amp-stream-gallery/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-stream-gallery/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {boolean, number, select, withKnobs} from '@storybook/addon-knobs';
 import {withAmp} from '@ampproject/storybook-addon';
diff --git a/extensions/amp-stream-gallery/1.0/storybook/Basic.js b/extensions/amp-stream-gallery/1.0/storybook/Basic.js
index 39d28db89367..66d35a2af7da 100644
--- a/extensions/amp-stream-gallery/1.0/storybook/Basic.js
+++ b/extensions/amp-stream-gallery/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {StreamGallery} from '../component';
 import {boolean, number, select, withKnobs} from '@storybook/addon-knobs';
diff --git a/extensions/amp-stream-gallery/1.0/test/test-amp-stream-gallery.js b/extensions/amp-stream-gallery/1.0/test/test-amp-stream-gallery.js
index ffa4018c7a9b..7de8d8aef59b 100644
--- a/extensions/amp-stream-gallery/1.0/test/test-amp-stream-gallery.js
+++ b/extensions/amp-stream-gallery/1.0/test/test-amp-stream-gallery.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import '../../../amp-base-carousel/1.0/amp-base-carousel';
 import '../amp-stream-gallery';
 import {ActionInvocation} from '#service/action-impl';
diff --git a/extensions/amp-stream-gallery/1.0/test/test-component.js b/extensions/amp-stream-gallery/1.0/test/test-component.js
index 472ff99b2328..3eba2f0feff5 100644
--- a/extensions/amp-stream-gallery/1.0/test/test-component.js
+++ b/extensions/amp-stream-gallery/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {StreamGallery} from '../component';
 import {mount} from 'enzyme';
diff --git a/extensions/amp-stream-gallery/amp-stream-gallery.md b/extensions/amp-stream-gallery/amp-stream-gallery.md
index e2689ef1d230..aded9f6ae377 100644
--- a/extensions/amp-stream-gallery/amp-stream-gallery.md
+++ b/extensions/amp-stream-gallery/amp-stream-gallery.md
@@ -8,22 +8,6 @@ experimental: true
 bento: true
 ---
 
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-stream-gallery
 
 ## Usage
diff --git a/extensions/amp-subscriptions-google/0.1/amp-subscriptions-google.css b/extensions/amp-subscriptions-google/0.1/amp-subscriptions-google.css
index 9614ae57951a..fd6c6a48e155 100644
--- a/extensions/amp-subscriptions-google/0.1/amp-subscriptions-google.css
+++ b/extensions/amp-subscriptions-google/0.1/amp-subscriptions-google.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 @import url("../../../third_party/subscriptions-project/swg-button.css");
 
diff --git a/extensions/amp-subscriptions-google/0.1/amp-subscriptions-google.js b/extensions/amp-subscriptions-google/0.1/amp-subscriptions-google.js
index 73e3362beffe..bc2bd3c9e8cd 100644
--- a/extensions/amp-subscriptions-google/0.1/amp-subscriptions-google.js
+++ b/extensions/amp-subscriptions-google/0.1/amp-subscriptions-google.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getValueForExpr} from '#core/types/object';
 import {parseQueryString} from '#core/types/string/url';
 import {WindowInterface} from '#core/window/interface';
diff --git a/extensions/amp-subscriptions-google/0.1/test-e2e/test-amp-subscriptions-google.js b/extensions/amp-subscriptions-google/0.1/test-e2e/test-amp-subscriptions-google.js
index 47fba0d9ab8e..c90d31e3d31b 100644
--- a/extensions/amp-subscriptions-google/0.1/test-e2e/test-amp-subscriptions-google.js
+++ b/extensions/amp-subscriptions-google/0.1/test-e2e/test-amp-subscriptions-google.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-subscriptions-google',
   {
diff --git a/extensions/amp-subscriptions-google/0.1/test/test-amp-subscriptions-google.js b/extensions/amp-subscriptions-google/0.1/test/test-amp-subscriptions-google.js
index 8fb5852a464c..ea5cae065893 100644
--- a/extensions/amp-subscriptions-google/0.1/test/test-amp-subscriptions-google.js
+++ b/extensions/amp-subscriptions-google/0.1/test/test-amp-subscriptions-google.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {WindowInterface} from '#core/window/interface';
 
 import {toggleExperiment} from '#experiments';
diff --git a/extensions/amp-subscriptions-google/amp-subscriptions-google.md b/extensions/amp-subscriptions-google/amp-subscriptions-google.md
index ca0d0d8f8afb..9967079efdd5 100644
--- a/extensions/amp-subscriptions-google/amp-subscriptions-google.md
+++ b/extensions/amp-subscriptions-google/amp-subscriptions-google.md
@@ -6,22 +6,6 @@ teaser:
   text: Implements subscription-style access protocol for Subscribe with Google.
 ---
 
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-subscriptions-google
 
 ## Introduction
diff --git a/extensions/amp-subscriptions/0.1/actions.js b/extensions/amp-subscriptions/0.1/actions.js
index c1dd3e141a6c..deb4bcec7391 100644
--- a/extensions/amp-subscriptions/0.1/actions.js
+++ b/extensions/amp-subscriptions/0.1/actions.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionStatus} from './analytics';
 import {assertHttpsUrl} from '../../../src/url';
 import {dev, userAssert} from '../../../src/log';
diff --git a/extensions/amp-subscriptions/0.1/amp-subscriptions.css b/extensions/amp-subscriptions/0.1/amp-subscriptions.css
index ed946ccfe4b9..065e839e8bd9 100644
--- a/extensions/amp-subscriptions/0.1/amp-subscriptions.css
+++ b/extensions/amp-subscriptions/0.1/amp-subscriptions.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 
 /**
diff --git a/extensions/amp-subscriptions/0.1/amp-subscriptions.js b/extensions/amp-subscriptions/0.1/amp-subscriptions.js
index d87164d999e2..2f7517f5cdf3 100644
--- a/extensions/amp-subscriptions/0.1/amp-subscriptions.js
+++ b/extensions/amp-subscriptions/0.1/amp-subscriptions.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   ActionStatus,
   SubscriptionAnalytics,
diff --git a/extensions/amp-subscriptions/0.1/analytics.js b/extensions/amp-subscriptions/0.1/analytics.js
index 1d8a801a0744..565ceaf0ef7b 100644
--- a/extensions/amp-subscriptions/0.1/analytics.js
+++ b/extensions/amp-subscriptions/0.1/analytics.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 import {triggerAnalyticsEvent} from '../../../src/analytics';
 import {user} from '../../../src/log';
diff --git a/extensions/amp-subscriptions/0.1/constants.js b/extensions/amp-subscriptions/0.1/constants.js
index c83b3aa84752..ca4371527dce 100644
--- a/extensions/amp-subscriptions/0.1/constants.js
+++ b/extensions/amp-subscriptions/0.1/constants.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @fileoverview Shared constants. */
 
 /**
diff --git a/extensions/amp-subscriptions/0.1/crypto-handler.js b/extensions/amp-subscriptions/0.1/crypto-handler.js
index 0bcc65e45eb0..2bf3bb9ee56f 100644
--- a/extensions/amp-subscriptions/0.1/crypto-handler.js
+++ b/extensions/amp-subscriptions/0.1/crypto-handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   base64Decode,
   decryptAesGcmImpl,
diff --git a/extensions/amp-subscriptions/0.1/dialog.js b/extensions/amp-subscriptions/0.1/dialog.js
index ed46b5d16aa2..71509a0e5db6 100644
--- a/extensions/amp-subscriptions/0.1/dialog.js
+++ b/extensions/amp-subscriptions/0.1/dialog.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {createElementWithAttributes} from '#core/dom';
 import {setImportantStyles, toggle} from '#core/dom/style';
diff --git a/extensions/amp-subscriptions/0.1/doc-impl.js b/extensions/amp-subscriptions/0.1/doc-impl.js
index 6355c981a514..bfcc0e8f1245 100644
--- a/extensions/amp-subscriptions/0.1/doc-impl.js
+++ b/extensions/amp-subscriptions/0.1/doc-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Doc} from '#third_party/subscriptions-project/config';
 import {Services} from '#service';
 import {dev} from '../../../src/log';
diff --git a/extensions/amp-subscriptions/0.1/entitlement.js b/extensions/amp-subscriptions/0.1/entitlement.js
index 771b3eb2e503..15dbfed52507 100644
--- a/extensions/amp-subscriptions/0.1/entitlement.js
+++ b/extensions/amp-subscriptions/0.1/entitlement.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {dict} from '#core/types/object';
 
 /** @enum {string} */
diff --git a/extensions/amp-subscriptions/0.1/expr.js b/extensions/amp-subscriptions/0.1/expr.js
index 7766d967c662..8f288284d300 100644
--- a/extensions/amp-subscriptions/0.1/expr.js
+++ b/extensions/amp-subscriptions/0.1/expr.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {evaluateAccessExpr} from '../../amp-access/0.1/access-expr';
 
 /**
diff --git a/extensions/amp-subscriptions/0.1/local-subscription-platform-base.js b/extensions/amp-subscriptions/0.1/local-subscription-platform-base.js
index e89e1eb2cd37..019b1b375bcd 100644
--- a/extensions/amp-subscriptions/0.1/local-subscription-platform-base.js
+++ b/extensions/amp-subscriptions/0.1/local-subscription-platform-base.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Action} from './analytics';
 import {Actions} from './actions';
 import {LocalSubscriptionPlatformRenderer} from './local-subscription-platform-renderer';
diff --git a/extensions/amp-subscriptions/0.1/local-subscription-platform-iframe.js b/extensions/amp-subscriptions/0.1/local-subscription-platform-iframe.js
index 7843f7b194b5..04108f1a0fda 100644
--- a/extensions/amp-subscriptions/0.1/local-subscription-platform-iframe.js
+++ b/extensions/amp-subscriptions/0.1/local-subscription-platform-iframe.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {Entitlement} from './entitlement';
 import {LocalSubscriptionBasePlatform} from './local-subscription-platform-base';
diff --git a/extensions/amp-subscriptions/0.1/local-subscription-platform-remote.js b/extensions/amp-subscriptions/0.1/local-subscription-platform-remote.js
index faaccb17a42d..3133d036fd94 100644
--- a/extensions/amp-subscriptions/0.1/local-subscription-platform-remote.js
+++ b/extensions/amp-subscriptions/0.1/local-subscription-platform-remote.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Entitlement} from './entitlement';
 import {LocalSubscriptionBasePlatform} from './local-subscription-platform-base';
 import {Services} from '#service';
diff --git a/extensions/amp-subscriptions/0.1/local-subscription-platform-renderer.js b/extensions/amp-subscriptions/0.1/local-subscription-platform-renderer.js
index 50b21035f8d0..aa2b04c2dd5a 100644
--- a/extensions/amp-subscriptions/0.1/local-subscription-platform-renderer.js
+++ b/extensions/amp-subscriptions/0.1/local-subscription-platform-renderer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {dict} from '#core/types/object';
 import {evaluateExpr} from './expr';
diff --git a/extensions/amp-subscriptions/0.1/local-subscription-platform.js b/extensions/amp-subscriptions/0.1/local-subscription-platform.js
index 1e2ef846a298..c44c56bec411 100644
--- a/extensions/amp-subscriptions/0.1/local-subscription-platform.js
+++ b/extensions/amp-subscriptions/0.1/local-subscription-platform.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {LocalSubscriptionIframePlatform} from './local-subscription-platform-iframe';
 import {LocalSubscriptionRemotePlatform} from './local-subscription-platform-remote';
 
diff --git a/extensions/amp-subscriptions/0.1/metering.js b/extensions/amp-subscriptions/0.1/metering.js
index bb6602e96b97..06ce03476b9e 100644
--- a/extensions/amp-subscriptions/0.1/metering.js
+++ b/extensions/amp-subscriptions/0.1/metering.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {user} from '../../../src/log';
 
 /** @const */
diff --git a/extensions/amp-subscriptions/0.1/platform-store.js b/extensions/amp-subscriptions/0.1/platform-store.js
index 6f6808f51e91..1a3f6d1ef9c2 100644
--- a/extensions/amp-subscriptions/0.1/platform-store.js
+++ b/extensions/amp-subscriptions/0.1/platform-store.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {DEFAULT_SCORE_CONFIG, SubscriptionsScoreFactor} from './constants';
 import {Deferred} from '#core/data-structures/promise';
 import {Entitlement} from './entitlement';
diff --git a/extensions/amp-subscriptions/0.1/renderer.js b/extensions/amp-subscriptions/0.1/renderer.js
index 5d324377c643..ada41c1cc69a 100644
--- a/extensions/amp-subscriptions/0.1/renderer.js
+++ b/extensions/amp-subscriptions/0.1/renderer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {childElementByTag} from '#core/dom/query';
 import {createElementWithAttributes} from '#core/dom';
diff --git a/extensions/amp-subscriptions/0.1/service-adapter.js b/extensions/amp-subscriptions/0.1/service-adapter.js
index 41c3b5219b14..d2da925005b7 100644
--- a/extensions/amp-subscriptions/0.1/service-adapter.js
+++ b/extensions/amp-subscriptions/0.1/service-adapter.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {PageConfig as PageConfigInterface} from '#third_party/subscriptions-project/config';
 
 export class ServiceAdapter {
diff --git a/extensions/amp-subscriptions/0.1/subscription-platform.js b/extensions/amp-subscriptions/0.1/subscription-platform.js
index 35611ba773e9..f76611c5aa85 100644
--- a/extensions/amp-subscriptions/0.1/subscription-platform.js
+++ b/extensions/amp-subscriptions/0.1/subscription-platform.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * This interface is intended to be implemented by Subscription platforms to
  * provide method of getting entitlements.
diff --git a/extensions/amp-subscriptions/0.1/test/test-actions.js b/extensions/amp-subscriptions/0.1/test/test-actions.js
index cc23b00c0712..8f1583f3901b 100644
--- a/extensions/amp-subscriptions/0.1/test/test-actions.js
+++ b/extensions/amp-subscriptions/0.1/test/test-actions.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   Action,
   ActionStatus,
diff --git a/extensions/amp-subscriptions/0.1/test/test-amp-subscriptions.js b/extensions/amp-subscriptions/0.1/test/test-amp-subscriptions.js
index 1e96d3ca1f59..ca56587ea277 100644
--- a/extensions/amp-subscriptions/0.1/test/test-amp-subscriptions.js
+++ b/extensions/amp-subscriptions/0.1/test/test-amp-subscriptions.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as utilsStory from '../../../../src/utils/story';
 import {Entitlement, GrantReason} from '../entitlement';
 import {LocalSubscriptionIframePlatform} from '../local-subscription-platform-iframe';
diff --git a/extensions/amp-subscriptions/0.1/test/test-analytics.js b/extensions/amp-subscriptions/0.1/test/test-analytics.js
index dbbc8a9489b1..55c151821d1c 100644
--- a/extensions/amp-subscriptions/0.1/test/test-analytics.js
+++ b/extensions/amp-subscriptions/0.1/test/test-analytics.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as AmpAnalytics from '../../../../src/analytics';
 import {
   ActionStatus,
diff --git a/extensions/amp-subscriptions/0.1/test/test-crypto-handler.js b/extensions/amp-subscriptions/0.1/test/test-crypto-handler.js
index 6d54b6e9364b..af2756efa47c 100644
--- a/extensions/amp-subscriptions/0.1/test/test-crypto-handler.js
+++ b/extensions/amp-subscriptions/0.1/test/test-crypto-handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CryptoHandler} from '../crypto-handler';
 import {decryptAesGcm} from '#third_party/subscriptions-project/aes_gcm';
 
diff --git a/extensions/amp-subscriptions/0.1/test/test-dialog.js b/extensions/amp-subscriptions/0.1/test/test-dialog.js
index 0fe87bf6a96e..cf7e4f3625b8 100644
--- a/extensions/amp-subscriptions/0.1/test/test-dialog.js
+++ b/extensions/amp-subscriptions/0.1/test/test-dialog.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CSS} from '../../../../build/amp-subscriptions-0.1.css';
 import {Dialog} from '../dialog';
 import {Services} from '#service';
diff --git a/extensions/amp-subscriptions/0.1/test/test-doc-impl.js b/extensions/amp-subscriptions/0.1/test/test-doc-impl.js
index 54f6af288360..56daba3c9966 100644
--- a/extensions/amp-subscriptions/0.1/test/test-doc-impl.js
+++ b/extensions/amp-subscriptions/0.1/test/test-doc-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {DocImpl} from '../doc-impl';
 
 describes.realWin('DocImpl', {amp: true}, (env) => {
diff --git a/extensions/amp-subscriptions/0.1/test/test-entitlement.js b/extensions/amp-subscriptions/0.1/test/test-entitlement.js
index 5610250c008e..7ff00afaf31a 100644
--- a/extensions/amp-subscriptions/0.1/test/test-entitlement.js
+++ b/extensions/amp-subscriptions/0.1/test/test-entitlement.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Entitlement, GrantReason} from '../entitlement';
 
 describes.realWin('EntitlementClass', {}, () => {
diff --git a/extensions/amp-subscriptions/0.1/test/test-local-subscription-rendering.js b/extensions/amp-subscriptions/0.1/test/test-local-subscription-rendering.js
index 0be373eff176..6ba65bcbdf4d 100644
--- a/extensions/amp-subscriptions/0.1/test/test-local-subscription-rendering.js
+++ b/extensions/amp-subscriptions/0.1/test/test-local-subscription-rendering.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Action} from '../analytics';
 import {Dialog} from '../dialog';
 import {Entitlement} from '../entitlement';
diff --git a/extensions/amp-subscriptions/0.1/test/test-local-subscriptions-iframe-platform.js b/extensions/amp-subscriptions/0.1/test/test-local-subscriptions-iframe-platform.js
index a16063850dcb..f972e6a7a46a 100644
--- a/extensions/amp-subscriptions/0.1/test/test-local-subscriptions-iframe-platform.js
+++ b/extensions/amp-subscriptions/0.1/test/test-local-subscriptions-iframe-platform.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Action, SubscriptionAnalytics} from '../analytics';
 import {Dialog} from '../dialog';
 import {Entitlement} from '../entitlement';
diff --git a/extensions/amp-subscriptions/0.1/test/test-local-subscriptions.js b/extensions/amp-subscriptions/0.1/test/test-local-subscriptions.js
index 3b6872d65727..591607744bf5 100644
--- a/extensions/amp-subscriptions/0.1/test/test-local-subscriptions.js
+++ b/extensions/amp-subscriptions/0.1/test/test-local-subscriptions.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Action, SubscriptionAnalytics} from '../analytics';
 import {Dialog} from '../dialog';
 import {Entitlement, GrantReason} from '../entitlement';
diff --git a/extensions/amp-subscriptions/0.1/test/test-metering.js b/extensions/amp-subscriptions/0.1/test/test-metering.js
index fbd9a77e735b..34e93e452fc2 100644
--- a/extensions/amp-subscriptions/0.1/test/test-metering.js
+++ b/extensions/amp-subscriptions/0.1/test/test-metering.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Metering} from '../metering';
 
 describes.fakeWin('Metering', {amp: true}, () => {
diff --git a/extensions/amp-subscriptions/0.1/test/test-platform-store.js b/extensions/amp-subscriptions/0.1/test/test-platform-store.js
index ef07b4c308da..67d32b2c2918 100644
--- a/extensions/amp-subscriptions/0.1/test/test-platform-store.js
+++ b/extensions/amp-subscriptions/0.1/test/test-platform-store.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Entitlement, GrantReason} from '../entitlement';
 
 import {PlatformStore} from '../platform-store';
diff --git a/extensions/amp-subscriptions/0.1/test/test-renderer.js b/extensions/amp-subscriptions/0.1/test/test-renderer.js
index 3eb90813eda8..be127b1a60b3 100644
--- a/extensions/amp-subscriptions/0.1/test/test-renderer.js
+++ b/extensions/amp-subscriptions/0.1/test/test-renderer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Action} from '../analytics';
 import {CSS} from '../../../../build/amp-subscriptions-0.1.css';
 import {Renderer} from '../renderer';
diff --git a/extensions/amp-subscriptions/0.1/test/test-service-adapter.js b/extensions/amp-subscriptions/0.1/test/test-service-adapter.js
index 3aad59b31eba..ea0c7d5b8247 100644
--- a/extensions/amp-subscriptions/0.1/test/test-service-adapter.js
+++ b/extensions/amp-subscriptions/0.1/test/test-service-adapter.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {PageConfig} from '#third_party/subscriptions-project/config';
 import {ServiceAdapter} from '../service-adapter';
 import {SubscriptionService} from '../amp-subscriptions';
diff --git a/extensions/amp-subscriptions/0.1/test/test-url-builder.js b/extensions/amp-subscriptions/0.1/test/test-url-builder.js
index 1063e613df2a..cd39654b9133 100644
--- a/extensions/amp-subscriptions/0.1/test/test-url-builder.js
+++ b/extensions/amp-subscriptions/0.1/test/test-url-builder.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {UrlBuilder} from '../url-builder';
 
 describes.fakeWin('UrlBuilder', {amp: true}, (env) => {
diff --git a/extensions/amp-subscriptions/0.1/test/test-viewer-platform.js b/extensions/amp-subscriptions/0.1/test/test-viewer-platform.js
index 4cb6569ca02e..caef82b45a5a 100644
--- a/extensions/amp-subscriptions/0.1/test/test-viewer-platform.js
+++ b/extensions/amp-subscriptions/0.1/test/test-viewer-platform.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Action, SubscriptionAnalytics} from '../analytics';
 import {Dialog} from '../dialog';
 import {ENTITLEMENTS_REQUEST_TIMEOUT} from '../constants';
diff --git a/extensions/amp-subscriptions/0.1/test/test-viewer-tracker.js b/extensions/amp-subscriptions/0.1/test/test-viewer-tracker.js
index 4e2eb4ef197d..3f176535751b 100644
--- a/extensions/amp-subscriptions/0.1/test/test-viewer-tracker.js
+++ b/extensions/amp-subscriptions/0.1/test/test-viewer-tracker.js
@@ -1,22 +1,6 @@
 import {Observable} from '#core/data-structures/observable';
 import {ViewerTracker} from '../viewer-tracker';
 
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.realWin('ViewerTracker', {amp: true}, (env) => {
   let ampdoc;
   let viewTracker;
diff --git a/extensions/amp-subscriptions/0.1/url-builder.js b/extensions/amp-subscriptions/0.1/url-builder.js
index eb8405ef7447..548fe13d8357 100644
--- a/extensions/amp-subscriptions/0.1/url-builder.js
+++ b/extensions/amp-subscriptions/0.1/url-builder.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {getValueForExpr} from '#core/types/object';
 
diff --git a/extensions/amp-subscriptions/0.1/viewer-subscription-platform.js b/extensions/amp-subscriptions/0.1/viewer-subscription-platform.js
index 117d8913046b..33a6c4003d6b 100644
--- a/extensions/amp-subscriptions/0.1/viewer-subscription-platform.js
+++ b/extensions/amp-subscriptions/0.1/viewer-subscription-platform.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ENTITLEMENTS_REQUEST_TIMEOUT} from './constants';
 import {Entitlement, GrantReason} from './entitlement';
 import {JwtHelper} from '../../amp-access/0.1/jwt';
diff --git a/extensions/amp-subscriptions/0.1/viewer-tracker.js b/extensions/amp-subscriptions/0.1/viewer-tracker.js
index d99710093a35..8a173a0d2226 100644
--- a/extensions/amp-subscriptions/0.1/viewer-tracker.js
+++ b/extensions/amp-subscriptions/0.1/viewer-tracker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {cancellation} from '../../../src/error-reporting';
 import {dev} from '../../../src/log';
diff --git a/extensions/amp-subscriptions/amp-subscriptions.md b/extensions/amp-subscriptions/amp-subscriptions.md
index af669cef8947..4e9af9504dda 100644
--- a/extensions/amp-subscriptions/amp-subscriptions.md
+++ b/extensions/amp-subscriptions/amp-subscriptions.md
@@ -6,22 +6,6 @@ teaser:
   text: Implements subscription-style access protocol.
 ---
 
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-subscriptions
 
 ## Usage
diff --git a/extensions/amp-tiktok/0.1/amp-tiktok.css b/extensions/amp-tiktok/0.1/amp-tiktok.css
index b7177c0a6a46..d6ba959a7a4d 100644
--- a/extensions/amp-tiktok/0.1/amp-tiktok.css
+++ b/extensions/amp-tiktok/0.1/amp-tiktok.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .i-amphtml-tiktok-centered {
     height: 100%;
diff --git a/extensions/amp-tiktok/0.1/amp-tiktok.js b/extensions/amp-tiktok/0.1/amp-tiktok.js
index 5942377e68b5..9d6bb868bc05 100644
--- a/extensions/amp-tiktok/0.1/amp-tiktok.js
+++ b/extensions/amp-tiktok/0.1/amp-tiktok.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CSS} from '../../../build/amp-tiktok-0.1.css';
 import {Deferred} from '#core/data-structures/promise';
 import {Services} from '#service';
diff --git a/extensions/amp-tiktok/0.1/test/test-amp-tiktok.js b/extensions/amp-tiktok/0.1/test/test-amp-tiktok.js
index ea65fbe6a224..09de4b735184 100644
--- a/extensions/amp-tiktok/0.1/test/test-amp-tiktok.js
+++ b/extensions/amp-tiktok/0.1/test/test-amp-tiktok.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-tiktok';
 import * as dom from '#core/dom';
 import {Services} from '#service';
diff --git a/extensions/amp-tiktok/amp-tiktok.md b/extensions/amp-tiktok/amp-tiktok.md
index 5d51e249e315..4fbb6d881828 100644
--- a/extensions/amp-tiktok/amp-tiktok.md
+++ b/extensions/amp-tiktok/amp-tiktok.md
@@ -7,22 +7,6 @@ teaser:
 experimental: true
 ---
 
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-tiktok
 
 ## Usage
diff --git a/extensions/amp-timeago/0.1/amp-timeago.js b/extensions/amp-timeago/0.1/amp-timeago.js
index 8b3e1b80f8f5..4d6552234db1 100644
--- a/extensions/amp-timeago/0.1/amp-timeago.js
+++ b/extensions/amp-timeago/0.1/amp-timeago.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isLayoutSizeDefined} from '#core/dom/layout';
 import {
   observeWithSharedInOb,
diff --git a/extensions/amp-timeago/0.1/locales.js b/extensions/amp-timeago/0.1/locales.js
index 9005926c6cfa..c069ebb52c2f 100644
--- a/extensions/amp-timeago/0.1/locales.js
+++ b/extensions/amp-timeago/0.1/locales.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * This file registers all necessary locales supported by amp-timeago.
  */
diff --git a/extensions/amp-timeago/0.1/test/test-amp-timeago.js b/extensions/amp-timeago/0.1/test/test-amp-timeago.js
index 672a61765eef..25eea437ef5b 100644
--- a/extensions/amp-timeago/0.1/test/test-amp-timeago.js
+++ b/extensions/amp-timeago/0.1/test/test-amp-timeago.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import '../amp-timeago';
 
 describes.realWin(
diff --git a/extensions/amp-timeago/1.0/amp-timeago.css b/extensions/amp-timeago/1.0/amp-timeago.css
index 360b541f4af3..c7079bba8e53 100644
--- a/extensions/amp-timeago/1.0/amp-timeago.css
+++ b/extensions/amp-timeago/1.0/amp-timeago.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * Pre-upgrade:
diff --git a/extensions/amp-timeago/1.0/amp-timeago.js b/extensions/amp-timeago/1.0/amp-timeago.js
index 1158896a2ab2..32464ca525ed 100644
--- a/extensions/amp-timeago/1.0/amp-timeago.js
+++ b/extensions/amp-timeago/1.0/amp-timeago.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isExperimentOn} from '#experiments';
 
 import {BaseElement} from './base-element';
diff --git a/extensions/amp-timeago/1.0/base-element.js b/extensions/amp-timeago/1.0/base-element.js
index 5146a4c8741e..9b8edd6b0325 100644
--- a/extensions/amp-timeago/1.0/base-element.js
+++ b/extensions/amp-timeago/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseDateAttrs as parseDateAttrsBase} from '#core/dom/parse-date-attributes';
 
 import {PreactBaseElement} from '#preact/base-element';
diff --git a/extensions/amp-timeago/1.0/component.js b/extensions/amp-timeago/1.0/component.js
index 0308a662b2c5..549870b95c60 100644
--- a/extensions/amp-timeago/1.0/component.js
+++ b/extensions/amp-timeago/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getDate} from '#core/types/date';
 import {toWin} from '#core/window';
 
diff --git a/extensions/amp-timeago/1.0/component.type.js b/extensions/amp-timeago/1.0/component.type.js
index 30054a5c9112..85cf7ec2a67c 100644
--- a/extensions/amp-timeago/1.0/component.type.js
+++ b/extensions/amp-timeago/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /**
diff --git a/extensions/amp-timeago/1.0/locales.js b/extensions/amp-timeago/1.0/locales.js
index 9005926c6cfa..c069ebb52c2f 100644
--- a/extensions/amp-timeago/1.0/locales.js
+++ b/extensions/amp-timeago/1.0/locales.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * This file registers all necessary locales supported by amp-timeago.
  */
diff --git a/extensions/amp-timeago/1.0/storybook/Basic.amp.js b/extensions/amp-timeago/1.0/storybook/Basic.amp.js
index c9a1aa3b5dbe..f187ad41b186 100644
--- a/extensions/amp-timeago/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-timeago/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {date, number, text, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-timeago/1.0/storybook/Basic.js b/extensions/amp-timeago/1.0/storybook/Basic.js
index 3a46d8b67bf0..062cad42e51f 100644
--- a/extensions/amp-timeago/1.0/storybook/Basic.js
+++ b/extensions/amp-timeago/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {date, number, select, text, withKnobs} from '@storybook/addon-knobs';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-timeago/1.0/test/test-amp-timeago.js b/extensions/amp-timeago/1.0/test/test-amp-timeago.js
index b082279cb5c9..cc15fa59a12b 100644
--- a/extensions/amp-timeago/1.0/test/test-amp-timeago.js
+++ b/extensions/amp-timeago/1.0/test/test-amp-timeago.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import '../amp-timeago';
 import {toggleExperiment} from '#experiments';
 
diff --git a/extensions/amp-timeago/1.0/test/test-component.js b/extensions/amp-timeago/1.0/test/test-component.js
index f4996849dbfb..4d2100188c3d 100644
--- a/extensions/amp-timeago/1.0/test/test-component.js
+++ b/extensions/amp-timeago/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {mount} from 'enzyme';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-truncate-text/0.1/amp-truncate-text-shadow.css b/extensions/amp-truncate-text/0.1/amp-truncate-text-shadow.css
index 02bcf83f59ea..1265721cad45 100644
--- a/extensions/amp-truncate-text/0.1/amp-truncate-text-shadow.css
+++ b/extensions/amp-truncate-text/0.1/amp-truncate-text-shadow.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 :host {
   padding: 0 !important;
diff --git a/extensions/amp-truncate-text/0.1/amp-truncate-text.css b/extensions/amp-truncate-text/0.1/amp-truncate-text.css
index 5fadb5558afc..c4764f2cc8a7 100644
--- a/extensions/amp-truncate-text/0.1/amp-truncate-text.css
+++ b/extensions/amp-truncate-text/0.1/amp-truncate-text.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 amp-truncate-text {
   padding: 0 !important;
diff --git a/extensions/amp-truncate-text/0.1/amp-truncate-text.js b/extensions/amp-truncate-text/0.1/amp-truncate-text.js
index ee743f632b98..0cf57add1963 100644
--- a/extensions/amp-truncate-text/0.1/amp-truncate-text.js
+++ b/extensions/amp-truncate-text/0.1/amp-truncate-text.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {iterateCursor} from '#core/dom';
 import {
   closestAncestorElementBySelector,
diff --git a/extensions/amp-truncate-text/0.1/binary-search.js b/extensions/amp-truncate-text/0.1/binary-search.js
index 2b3cee5bd59d..8dcc1c6961b9 100644
--- a/extensions/amp-truncate-text/0.1/binary-search.js
+++ b/extensions/amp-truncate-text/0.1/binary-search.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert} from '../../../src/log';
 
 /**
diff --git a/extensions/amp-truncate-text/0.1/shadow-utils.js b/extensions/amp-truncate-text/0.1/shadow-utils.js
index 181467d39cc0..2099c73c7d12 100644
--- a/extensions/amp-truncate-text/0.1/shadow-utils.js
+++ b/extensions/amp-truncate-text/0.1/shadow-utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Creates a ShadowRoot for a given Element with some style text. This also
  * tags the first sizer element found with a slot, which is placed at the top
diff --git a/extensions/amp-truncate-text/0.1/test/test-amp-truncate-text.js b/extensions/amp-truncate-text/0.1/test/test-amp-truncate-text.js
index a657dda4ad3b..b82acacd26e3 100644
--- a/extensions/amp-truncate-text/0.1/test/test-amp-truncate-text.js
+++ b/extensions/amp-truncate-text/0.1/test/test-amp-truncate-text.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-truncate-text';
 import {setStyles} from '#core/dom/style';
 import {toArray} from '#core/types/array';
diff --git a/extensions/amp-truncate-text/0.1/test/test-binary-search.js b/extensions/amp-truncate-text/0.1/test/test-binary-search.js
index 4d7f9498696f..628eeb9c721b 100644
--- a/extensions/amp-truncate-text/0.1/test/test-binary-search.js
+++ b/extensions/amp-truncate-text/0.1/test/test-binary-search.js
@@ -4,22 +4,6 @@ import {
   binarySearch,
 } from '../binary-search';
 
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.sandboxed('binarySearch', {}, () => {
   const {NEXT, PREV} = BinarySearchPreference;
   const {LEFT, RIGHT} = BinarySearchStop;
diff --git a/extensions/amp-truncate-text/0.1/truncate-text.js b/extensions/amp-truncate-text/0.1/truncate-text.js
index dbe842d33e3a..ee2b1aba3e81 100644
--- a/extensions/amp-truncate-text/0.1/truncate-text.js
+++ b/extensions/amp-truncate-text/0.1/truncate-text.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {trimEnd} from '#core/types/string';
 
 import {
diff --git a/extensions/amp-twitter/0.1/amp-twitter.js b/extensions/amp-twitter/0.1/amp-twitter.js
index 9048c274a809..74bdd7137b3e 100644
--- a/extensions/amp-twitter/0.1/amp-twitter.js
+++ b/extensions/amp-twitter/0.1/amp-twitter.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {MessageType} from '#core/3p-frame-messaging';
 import {Services} from '#service';
 import {applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
diff --git a/extensions/amp-twitter/0.1/storybook/Basic.amp.js b/extensions/amp-twitter/0.1/storybook/Basic.amp.js
index c14c37852743..9f32b117c6ba 100644
--- a/extensions/amp-twitter/0.1/storybook/Basic.amp.js
+++ b/extensions/amp-twitter/0.1/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {boolean, number, select, withKnobs} from '@storybook/addon-knobs';
 import {withAmp} from '@ampproject/storybook-addon';
diff --git a/extensions/amp-twitter/0.1/test/test-amp-twitter.js b/extensions/amp-twitter/0.1/test/test-amp-twitter.js
index c2d6ba74f605..7e6a26e25ebe 100644
--- a/extensions/amp-twitter/0.1/test/test-amp-twitter.js
+++ b/extensions/amp-twitter/0.1/test/test-amp-twitter.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-twitter';
 import {cleanupTweetId_, twitter} from '#3p/twitter';
 
diff --git a/extensions/amp-twitter/1.0/amp-twitter.css b/extensions/amp-twitter/1.0/amp-twitter.css
index fb64405c4ae1..988d8e7c9351 100644
--- a/extensions/amp-twitter/1.0/amp-twitter.css
+++ b/extensions/amp-twitter/1.0/amp-twitter.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * Pre-upgrade:
diff --git a/extensions/amp-twitter/1.0/amp-twitter.js b/extensions/amp-twitter/1.0/amp-twitter.js
index 078997bbcf1c..0b64aace7fe3 100644
--- a/extensions/amp-twitter/1.0/amp-twitter.js
+++ b/extensions/amp-twitter/1.0/amp-twitter.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BaseElement} from './base-element';
 import {dict} from '#core/types/object';
 import {getBootstrapBaseUrl, getBootstrapUrl} from '../../../src/3p-frame';
diff --git a/extensions/amp-twitter/1.0/base-element.js b/extensions/amp-twitter/1.0/base-element.js
index 9fdc8e624689..970dc72e4c19 100644
--- a/extensions/amp-twitter/1.0/base-element.js
+++ b/extensions/amp-twitter/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {PreactBaseElement} from '#preact/base-element';
 import {Twitter} from './component';
 
diff --git a/extensions/amp-twitter/1.0/component.js b/extensions/amp-twitter/1.0/component.js
index eb832a22b41d..fae04b987e2b 100644
--- a/extensions/amp-twitter/1.0/component.js
+++ b/extensions/amp-twitter/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {MessageType, ProxyIframeEmbed} from '#preact/component/3p-frame';
 import {deserializeMessage} from '#core/3p-frame-messaging';
diff --git a/extensions/amp-twitter/1.0/component.type.js b/extensions/amp-twitter/1.0/component.type.js
index 054bc64168f6..4e6ae0d47d6a 100644
--- a/extensions/amp-twitter/1.0/component.type.js
+++ b/extensions/amp-twitter/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-twitter/1.0/storybook/Basic.amp.js b/extensions/amp-twitter/1.0/storybook/Basic.amp.js
index de4d1c8c8a60..5b7468e3a81f 100644
--- a/extensions/amp-twitter/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-twitter/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {boolean, number, select, withKnobs} from '@storybook/addon-knobs';
 import {withAmp} from '@ampproject/storybook-addon';
diff --git a/extensions/amp-twitter/1.0/storybook/Basic.js b/extensions/amp-twitter/1.0/storybook/Basic.js
index 453deb002b53..d490a15c25e4 100644
--- a/extensions/amp-twitter/1.0/storybook/Basic.js
+++ b/extensions/amp-twitter/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {Twitter} from '../component';
 import {boolean, number, select, withKnobs} from '@storybook/addon-knobs';
diff --git a/extensions/amp-twitter/1.0/test/test-amp-twitter.js b/extensions/amp-twitter/1.0/test/test-amp-twitter.js
index 7a069e70cf2e..27978eb3e5ad 100644
--- a/extensions/amp-twitter/1.0/test/test-amp-twitter.js
+++ b/extensions/amp-twitter/1.0/test/test-amp-twitter.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-twitter';
 import {createElementWithAttributes} from '#core/dom';
 import {doNotLoadExternalResourcesInTest} from '#testing/iframe';
diff --git a/extensions/amp-twitter/1.0/test/test-component.js b/extensions/amp-twitter/1.0/test/test-component.js
index d8b0cd48719a..47a626c0eb6e 100644
--- a/extensions/amp-twitter/1.0/test/test-component.js
+++ b/extensions/amp-twitter/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {Twitter} from '../component';
 import {WithAmpContext} from '#preact/context';
diff --git a/extensions/amp-twitter/amp-twitter.md b/extensions/amp-twitter/amp-twitter.md
index e1adfad7d7c3..c5603db7ad7c 100644
--- a/extensions/amp-twitter/amp-twitter.md
+++ b/extensions/amp-twitter/amp-twitter.md
@@ -7,22 +7,6 @@ teaser:
   text: Displays a Twitter Tweet or Moment.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-twitter
 
 ## Behavior
diff --git a/extensions/amp-user-notification/0.1/amp-user-notification.css b/extensions/amp-user-notification/0.1/amp-user-notification.css
index 1a0eda5348f7..9be689f9ac86 100644
--- a/extensions/amp-user-notification/0.1/amp-user-notification.css
+++ b/extensions/amp-user-notification/0.1/amp-user-notification.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 
 amp-user-notification {
diff --git a/extensions/amp-user-notification/0.1/amp-user-notification.js b/extensions/amp-user-notification/0.1/amp-user-notification.js
index 3997ffd9e6ff..db86ca9a7387 100644
--- a/extensions/amp-user-notification/0.1/amp-user-notification.js
+++ b/extensions/amp-user-notification/0.1/amp-user-notification.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {toggle} from '#core/dom/style';
 import {rethrowAsync} from '#core/error';
diff --git a/extensions/amp-user-notification/0.1/test/test-amp-user-notification.js b/extensions/amp-user-notification/0.1/test/test-amp-user-notification.js
index 4edeb712e894..2017aa7f6777 100644
--- a/extensions/amp-user-notification/0.1/test/test-amp-user-notification.js
+++ b/extensions/amp-user-notification/0.1/test/test-amp-user-notification.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {macroTask} from '#testing/helpers';
diff --git a/extensions/amp-video-docking/0.1/amp-video-docking.css b/extensions/amp-video-docking/0.1/amp-video-docking.css
index 70ea21d2ca0e..354579b2c035 100644
--- a/extensions/amp-video-docking/0.1/amp-video-docking.css
+++ b/extensions/amp-video-docking/0.1/amp-video-docking.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 .amp-video-docked-controls {
   /* Override in case of RTL so that buttons match their DOM order visually. */
diff --git a/extensions/amp-video-docking/0.1/amp-video-docking.js b/extensions/amp-video-docking/0.1/amp-video-docking.js
index c6e49c2b11d6..1479c05ab9ec 100644
--- a/extensions/amp-video-docking/0.1/amp-video-docking.js
+++ b/extensions/amp-video-docking/0.1/amp-video-docking.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {ActionTrust} from '#core/constants/action-constants';
 import {isRTL, removeElement} from '#core/dom';
 import {escapeCssSelectorIdent} from '#core/dom/css-selectors';
diff --git a/extensions/amp-video-docking/0.1/breakpoints.js b/extensions/amp-video-docking/0.1/breakpoints.js
index ff8ffd5491b1..2cc64fd82b9b 100644
--- a/extensions/amp-video-docking/0.1/breakpoints.js
+++ b/extensions/amp-video-docking/0.1/breakpoints.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @typedef {{className: string, minWidth: number}} */
 export let SyntheticBreakpointDef;
 
diff --git a/extensions/amp-video-docking/0.1/controls.js b/extensions/amp-video-docking/0.1/controls.js
index 71199a8c8813..ad3565c3750f 100644
--- a/extensions/amp-video-docking/0.1/controls.js
+++ b/extensions/amp-video-docking/0.1/controls.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {iterateCursor} from '#core/dom';
 import {layoutRectLtwh} from '#core/dom/layout/rect';
 import {closestAncestorElementBySelector} from '#core/dom/query';
diff --git a/extensions/amp-video-docking/0.1/def.js b/extensions/amp-video-docking/0.1/def.js
index c82d87025e56..bb823cb01e82 100644
--- a/extensions/amp-video-docking/0.1/def.js
+++ b/extensions/amp-video-docking/0.1/def.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * These are interchangeable.
  * @typedef {!ClientRect|!../../../src/layout-rect.LayoutRectDef}
diff --git a/extensions/amp-video-docking/0.1/events.js b/extensions/amp-video-docking/0.1/events.js
index 921b96492a2f..d8d29dad3a06 100644
--- a/extensions/amp-video-docking/0.1/events.js
+++ b/extensions/amp-video-docking/0.1/events.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dev} from '../../../src/log';
 
 /** @enum {string} */
diff --git a/extensions/amp-video-docking/0.1/html.js b/extensions/amp-video-docking/0.1/html.js
index 76002a1ed350..3bdd3afac902 100644
--- a/extensions/amp-video-docking/0.1/html.js
+++ b/extensions/amp-video-docking/0.1/html.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * See `src/core/dom/static-template.js`.
  * @typedef {function(!Array<string>):!Element}
diff --git a/extensions/amp-video-docking/0.1/math.js b/extensions/amp-video-docking/0.1/math.js
index b8a0fa9a6bf0..35a513e3970f 100644
--- a/extensions/amp-video-docking/0.1/math.js
+++ b/extensions/amp-video-docking/0.1/math.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {layoutRectLtwh} from '#core/dom/layout/rect';
 import {mapRange} from '#core/math';
 
diff --git a/extensions/amp-video-docking/0.1/test/test-amp-video-docking.js b/extensions/amp-video-docking/0.1/test/test-amp-video-docking.js
index 8c6a2ffbb441..0e433666ef28 100644
--- a/extensions/amp-video-docking/0.1/test/test-amp-video-docking.js
+++ b/extensions/amp-video-docking/0.1/test/test-amp-video-docking.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Deferred, tryResolve} from '#core/data-structures/promise';
 import {createElementWithAttributes} from '#core/dom';
 import {layoutRectLtwh} from '#core/dom/layout/rect';
diff --git a/extensions/amp-video-docking/0.1/test/test-breakpoints.js b/extensions/amp-video-docking/0.1/test/test-breakpoints.js
index 05ec53c402ff..0e8ae5b87395 100644
--- a/extensions/amp-video-docking/0.1/test/test-breakpoints.js
+++ b/extensions/amp-video-docking/0.1/test/test-breakpoints.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {applyBreakpointClassname} from '../breakpoints';
 
 describes.realWin('Synthetic Breakpoints', {amp: false}, (env) => {
diff --git a/extensions/amp-video-docking/0.1/timeout.js b/extensions/amp-video-docking/0.1/timeout.js
index 36f867d56bbf..11b1c8dc56c0 100644
--- a/extensions/amp-video-docking/0.1/timeout.js
+++ b/extensions/amp-video-docking/0.1/timeout.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 /** Timeout that can be postponed, repeated or cancelled. */
diff --git a/extensions/amp-video-docking/0.1/viewport-rect.js b/extensions/amp-video-docking/0.1/viewport-rect.js
index 3019ac2dbdf4..64c709e1d475 100644
--- a/extensions/amp-video-docking/0.1/viewport-rect.js
+++ b/extensions/amp-video-docking/0.1/viewport-rect.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {LayoutRectDef, layoutRectLtwh} from '#core/dom/layout/rect';
 
 /**
diff --git a/extensions/amp-video-docking/amp-video-docking.md b/extensions/amp-video-docking/amp-video-docking.md
index 51a78a4a2527..f68371950d4b 100644
--- a/extensions/amp-video-docking/amp-video-docking.md
+++ b/extensions/amp-video-docking/amp-video-docking.md
@@ -6,22 +6,6 @@ teaser:
   text: Functionality for videos that minimize ("dock") to a corner or a custom position on scroll.
 ---
 
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-video-docking
 
 ## Usage
diff --git a/extensions/amp-video-iframe/0.1/amp-video-iframe.js b/extensions/amp-video-iframe/0.1/amp-video-iframe.js
index 95f87cd619c5..b7c70b2e3847 100644
--- a/extensions/amp-video-iframe/0.1/amp-video-iframe.js
+++ b/extensions/amp-video-iframe/0.1/amp-video-iframe.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Deferred} from '#core/data-structures/promise';
 import {
   dispatchCustomEvent,
diff --git a/extensions/amp-video-iframe/0.1/test/test-amp-video-iframe.js b/extensions/amp-video-iframe/0.1/test/test-amp-video-iframe.js
index 44c32c09d348..6a2abfefab1e 100644
--- a/extensions/amp-video-iframe/0.1/test/test-amp-video-iframe.js
+++ b/extensions/amp-video-iframe/0.1/test/test-amp-video-iframe.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-video-iframe';
 import {createElementWithAttributes} from '#core/dom';
 import {whenUpgradedToCustomElement} from '#core/dom/amp-element-helpers';
diff --git a/extensions/amp-video-iframe/1.0/amp-video-iframe.css b/extensions/amp-video-iframe/1.0/amp-video-iframe.css
index bdc92cf1faa8..01ee407d58a4 100644
--- a/extensions/amp-video-iframe/1.0/amp-video-iframe.css
+++ b/extensions/amp-video-iframe/1.0/amp-video-iframe.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * Pre-upgrade:
diff --git a/extensions/amp-video-iframe/1.0/amp-video-iframe.js b/extensions/amp-video-iframe/1.0/amp-video-iframe.js
index f8ac9369dfbe..9c7e44703b0f 100644
--- a/extensions/amp-video-iframe/1.0/amp-video-iframe.js
+++ b/extensions/amp-video-iframe/1.0/amp-video-iframe.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {measureIntersection} from '#core/dom/layout/intersection';
 import {dict} from '#core/types/object';
 
diff --git a/extensions/amp-video-iframe/1.0/base-element.js b/extensions/amp-video-iframe/1.0/base-element.js
index 9a73b8df1a3a..6e5d5e59a005 100644
--- a/extensions/amp-video-iframe/1.0/base-element.js
+++ b/extensions/amp-video-iframe/1.0/base-element.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {VideoIframe} from './component';
 
 import {VideoBaseElement} from '../../amp-video/1.0/video-base-element';
diff --git a/extensions/amp-video-iframe/1.0/component.js b/extensions/amp-video-iframe/1.0/component.js
index fb45e155876a..1714d79dcf65 100644
--- a/extensions/amp-video-iframe/1.0/component.js
+++ b/extensions/amp-video-iframe/1.0/component.js
@@ -1,17 +1 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 export {VideoIframe} from '../../amp-video/1.0/video-iframe';
diff --git a/extensions/amp-video-iframe/1.0/storybook/Basic.amp.js b/extensions/amp-video-iframe/1.0/storybook/Basic.amp.js
index d36986e21184..13bc7b143144 100644
--- a/extensions/amp-video-iframe/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-video-iframe/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {boolean, number, text, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-video-iframe/1.0/test/test-amp-video-iframe.js b/extensions/amp-video-iframe/1.0/test/test-amp-video-iframe.js
index a2e6af98052d..6df089078d46 100644
--- a/extensions/amp-video-iframe/1.0/test/test-amp-video-iframe.js
+++ b/extensions/amp-video-iframe/1.0/test/test-amp-video-iframe.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-video-iframe';
 import {dispatchCustomEvent} from '#core/dom';
 import {htmlFor} from '#core/dom/static-template';
diff --git a/extensions/amp-video-iframe/amp-video-iframe-api.js b/extensions/amp-video-iframe/amp-video-iframe-api.js
index d02a2dbd0a9a..18ba06fab28d 100644
--- a/extensions/amp-video-iframe/amp-video-iframe-api.js
+++ b/extensions/amp-video-iframe/amp-video-iframe-api.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {VideoEvents} from '../../src/video-interface';
 
 /**
diff --git a/extensions/amp-video/0.1/amp-video.js b/extensions/amp-video/0.1/amp-video.js
index 1a57d0f0f23b..a9fe3522b2b2 100644
--- a/extensions/amp-video/0.1/amp-video.js
+++ b/extensions/amp-video/0.1/amp-video.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {EMPTY_METADATA} from '../../../src/mediasession-helper';
 import {PauseHelper} from '#core/dom/video/pause-helper';
 import {Services} from '#service';
diff --git a/extensions/amp-video/0.1/amp-video.md b/extensions/amp-video/0.1/amp-video.md
index 89d85514cd7c..6d3cec8dc34a 100644
--- a/extensions/amp-video/0.1/amp-video.md
+++ b/extensions/amp-video/0.1/amp-video.md
@@ -8,22 +8,6 @@ teaser:
   text: Replaces the HTML5 video tag.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-video
 
 ## Usage
diff --git a/extensions/amp-video/0.1/flexible-bitrate.js b/extensions/amp-video/0.1/flexible-bitrate.js
index 591269c1e810..23b0b7307e29 100644
--- a/extensions/amp-video/0.1/flexible-bitrate.js
+++ b/extensions/amp-video/0.1/flexible-bitrate.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {DomBasedWeakRef} from '#core/data-structures/dom-based-weakref';
 import {Services} from '#service';
 import {childElement, childElementsByTag} from '#core/dom/query';
diff --git a/extensions/amp-video/0.1/test-e2e/test-amp-video-analytics.js b/extensions/amp-video/0.1/test-e2e/test-amp-video-analytics.js
index ef57e1835f98..bec0814765de 100644
--- a/extensions/amp-video/0.1/test-e2e/test-amp-video-analytics.js
+++ b/extensions/amp-video/0.1/test-e2e/test-amp-video-analytics.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {awaitFrameAfter} from '#testing/helpers';
 
 describes.endtoend(
diff --git a/extensions/amp-video/0.1/test-e2e/test-amp-video-flexible-bitrate.js b/extensions/amp-video/0.1/test-e2e/test-amp-video-flexible-bitrate.js
index 42cf2df7c2d9..9ff57a9fb5d5 100644
--- a/extensions/amp-video/0.1/test-e2e/test-amp-video-flexible-bitrate.js
+++ b/extensions/amp-video/0.1/test-e2e/test-amp-video-flexible-bitrate.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {afterRenderPromise} from '#testing/helpers';
 
 const VIEWPORT = {
diff --git a/extensions/amp-video/0.1/test-e2e/test-amp-video.js b/extensions/amp-video/0.1/test-e2e/test-amp-video.js
index 2ed2848bb986..f45fc2ca0d6f 100644
--- a/extensions/amp-video/0.1/test-e2e/test-amp-video.js
+++ b/extensions/amp-video/0.1/test-e2e/test-amp-video.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-video autoplay with control',
   {
diff --git a/extensions/amp-video/0.1/test/test-amp-video.js b/extensions/amp-video/0.1/test/test-amp-video.js
index 03894f29bf22..4a77bbf1cf3d 100644
--- a/extensions/amp-video/0.1/test/test-amp-video.js
+++ b/extensions/amp-video/0.1/test/test-amp-video.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpCacheUrlService} from '../../../amp-cache-url/0.1/amp-cache-url';
 import {AmpVideo, isCachedByCdn} from '../amp-video';
 import {Services} from '#service';
diff --git a/extensions/amp-video/0.1/test/test-flexible-bitrate.js b/extensions/amp-video/0.1/test/test-flexible-bitrate.js
index 46813ac5aced..c2a3acb31f72 100644
--- a/extensions/amp-video/0.1/test/test-flexible-bitrate.js
+++ b/extensions/amp-video/0.1/test/test-flexible-bitrate.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../flexible-bitrate';
 import {BitrateManager} from '../flexible-bitrate';
 import {childElementsByTag} from '#core/dom/query';
diff --git a/extensions/amp-video/0.1/test/test-video-cache.js b/extensions/amp-video/0.1/test/test-video-cache.js
index 317814153c1d..349247a51219 100644
--- a/extensions/amp-video/0.1/test/test-video-cache.js
+++ b/extensions/amp-video/0.1/test/test-video-cache.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpCacheUrlService} from '../../../amp-cache-url/0.1/amp-cache-url';
 import {Services} from '#service';
 import {createElementWithAttributes} from '#core/dom';
diff --git a/extensions/amp-video/0.1/video-cache.js b/extensions/amp-video/0.1/video-cache.js
index 2704933cc2b5..3b2f12034f79 100644
--- a/extensions/amp-video/0.1/video-cache.js
+++ b/extensions/amp-video/0.1/video-cache.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {addParamsToUrl, resolveRelativeUrl} from '../../../src/url';
 import {
diff --git a/extensions/amp-video/1.0/amp-video.css b/extensions/amp-video/1.0/amp-video.css
index c1606459faa2..3c693140514c 100644
--- a/extensions/amp-video/1.0/amp-video.css
+++ b/extensions/amp-video/1.0/amp-video.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * Pre-upgrade:
diff --git a/extensions/amp-video/1.0/amp-video.js b/extensions/amp-video/1.0/amp-video.js
index 3a35d3a5be79..7e625afc9a47 100644
--- a/extensions/amp-video/1.0/amp-video.js
+++ b/extensions/amp-video/1.0/amp-video.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CSS} from '../../../build/amp-video-1.0.css';
 import {VideoBaseElement} from './video-base-element';
 import {isExperimentOn} from '#experiments';
diff --git a/extensions/amp-video/1.0/autoplay.jss.js b/extensions/amp-video/1.0/autoplay.jss.js
index ad384f92a50c..9099d1a277a8 100644
--- a/extensions/amp-video/1.0/autoplay.jss.js
+++ b/extensions/amp-video/1.0/autoplay.jss.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createUseStyles} from 'react-jss';
 
 const eq = {
diff --git a/extensions/amp-video/1.0/base-element.js b/extensions/amp-video/1.0/base-element.js
index f9605e5c2e5f..5f17be0f8541 100644
--- a/extensions/amp-video/1.0/base-element.js
+++ b/extensions/amp-video/1.0/base-element.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {CSS} from './component.jss';
 import {CSS as CSS_AUTOPLAY} from './autoplay.jss';
 import {PreactBaseElement} from '#preact/base-element';
diff --git a/extensions/amp-video/1.0/component.js b/extensions/amp-video/1.0/component.js
index c1b09dbddecd..dfc8d51f2ecc 100644
--- a/extensions/amp-video/1.0/component.js
+++ b/extensions/amp-video/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {ContainWrapper, useValueRef} from '#preact/component';
 import {Deferred} from '#core/data-structures/promise';
diff --git a/extensions/amp-video/1.0/component.jss.js b/extensions/amp-video/1.0/component.jss.js
index 48d3912fc6c3..e48d71208e44 100644
--- a/extensions/amp-video/1.0/component.jss.js
+++ b/extensions/amp-video/1.0/component.jss.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createUseStyles} from 'react-jss';
 
 // TODO(alanorozco): Share these across components.
diff --git a/extensions/amp-video/1.0/component.type.js b/extensions/amp-video/1.0/component.type.js
index 1efac073d63d..b1112647cb46 100644
--- a/extensions/amp-video/1.0/component.type.js
+++ b/extensions/amp-video/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-video/1.0/storybook/Basic.amp.js b/extensions/amp-video/1.0/storybook/Basic.amp.js
index 9e04dd1d745e..94d1cb719a35 100644
--- a/extensions/amp-video/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-video/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {VideoElementWithActions} from './_helpers';
 import {boolean, number, object, text, withKnobs} from '@storybook/addon-knobs';
diff --git a/extensions/amp-video/1.0/storybook/Basic.js b/extensions/amp-video/1.0/storybook/Basic.js
index 74f612a09e0c..4d9867827102 100644
--- a/extensions/amp-video/1.0/storybook/Basic.js
+++ b/extensions/amp-video/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {
   Accordion,
diff --git a/extensions/amp-video/1.0/storybook/_helpers.js b/extensions/amp-video/1.0/storybook/_helpers.js
index f4b793724c50..330a1c0024fc 100644
--- a/extensions/amp-video/1.0/storybook/_helpers.js
+++ b/extensions/amp-video/1.0/storybook/_helpers.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import * as Preact from '#preact';
 
 export const VideoElementWithActions = ({
diff --git a/extensions/amp-video/1.0/test/test-amp-video.js b/extensions/amp-video/1.0/test/test-amp-video.js
index 296f08d10509..d04873e1ac87 100644
--- a/extensions/amp-video/1.0/test/test-amp-video.js
+++ b/extensions/amp-video/1.0/test/test-amp-video.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-video';
 import {dispatchCustomEvent} from '#core/dom';
 import {htmlFor} from '#core/dom/static-template';
diff --git a/extensions/amp-video/1.0/test/test-video-iframe.js b/extensions/amp-video/1.0/test/test-video-iframe.js
index 58c450bfc07b..39b78b216fdb 100644
--- a/extensions/amp-video/1.0/test/test-video-iframe.js
+++ b/extensions/amp-video/1.0/test/test-video-iframe.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {VideoIframeInternal} from '../video-iframe';
 import {createRef} from '#preact';
diff --git a/extensions/amp-video/1.0/test/test-video-wrapper.js b/extensions/amp-video/1.0/test/test-video-wrapper.js
index 8e3d83c3348a..1a3e6d230188 100644
--- a/extensions/amp-video/1.0/test/test-video-wrapper.js
+++ b/extensions/amp-video/1.0/test/test-video-wrapper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {VideoWrapper} from '../component';
 import {WithAmpContext} from '#preact/context';
diff --git a/extensions/amp-video/1.0/video-base-element.js b/extensions/amp-video/1.0/video-base-element.js
index 5b5a0792593e..5af188ebbba2 100644
--- a/extensions/amp-video/1.0/video-base-element.js
+++ b/extensions/amp-video/1.0/video-base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {BaseElement} from './base-element';
 
diff --git a/extensions/amp-video/1.0/video-iframe.js b/extensions/amp-video/1.0/video-iframe.js
index 2b3d4164ea84..931b86973788 100644
--- a/extensions/amp-video/1.0/video-iframe.js
+++ b/extensions/amp-video/1.0/video-iframe.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {Deferred} from '#core/data-structures/promise';
 import {VideoWrapper} from './component';
diff --git a/extensions/amp-video/1.0/video-iframe.type.js b/extensions/amp-video/1.0/video-iframe.type.js
index 8df6328bd2e2..43aeae382be8 100644
--- a/extensions/amp-video/1.0/video-iframe.type.js
+++ b/extensions/amp-video/1.0/video-iframe.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-video/amp-video.md b/extensions/amp-video/amp-video.md
index 116dfc6b1bf9..759e229c812a 100644
--- a/extensions/amp-video/amp-video.md
+++ b/extensions/amp-video/amp-video.md
@@ -8,22 +8,6 @@ experimental: true
 bento: true
 ---
 
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-video
 
 ## Usage
diff --git a/extensions/amp-viewer-integration/0.1/amp-viewer-integration.js b/extensions/amp-viewer-integration/0.1/amp-viewer-integration.js
index 64c3aa1f9b41..dd28eb4b4ae8 100644
--- a/extensions/amp-viewer-integration/0.1/amp-viewer-integration.js
+++ b/extensions/amp-viewer-integration/0.1/amp-viewer-integration.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isIframed} from '#core/dom';
 import {dict} from '#core/types/object';
 
diff --git a/extensions/amp-viewer-integration/0.1/examples/amp-viewer-host.js b/extensions/amp-viewer-integration/0.1/examples/amp-viewer-host.js
index 4edf2d59df89..bd8919704348 100644
--- a/extensions/amp-viewer-integration/0.1/examples/amp-viewer-host.js
+++ b/extensions/amp-viewer-integration/0.1/examples/amp-viewer-host.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Messaging} from '../messaging/messaging';
 
 /**
diff --git a/extensions/amp-viewer-integration/0.1/findtext.js b/extensions/amp-viewer-integration/0.1/findtext.js
index 5a2cb8d57e0a..bdfbca420637 100644
--- a/extensions/amp-viewer-integration/0.1/findtext.js
+++ b/extensions/amp-viewer-integration/0.1/findtext.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {computedStyle} from '#core/dom/style';
 
 import {devAssert} from '../../../src/log';
diff --git a/extensions/amp-viewer-integration/0.1/focus-handler.js b/extensions/amp-viewer-integration/0.1/focus-handler.js
index 97cf7812e4af..b516f81d07b3 100644
--- a/extensions/amp-viewer-integration/0.1/focus-handler.js
+++ b/extensions/amp-viewer-integration/0.1/focus-handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {listen} from '../../../src/event-helper';
diff --git a/extensions/amp-viewer-integration/0.1/highlight-handler.js b/extensions/amp-viewer-integration/0.1/highlight-handler.js
index 344b8ee5142d..a24b8cc21683 100644
--- a/extensions/amp-viewer-integration/0.1/highlight-handler.js
+++ b/extensions/amp-viewer-integration/0.1/highlight-handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {whenDocumentReady} from '#core/document-ready';
 import {moveLayoutRect} from '#core/dom/layout/rect';
 import {resetStyles, setInitialDisplay, setStyles} from '#core/dom/style';
diff --git a/extensions/amp-viewer-integration/0.1/keyboard-handler.js b/extensions/amp-viewer-integration/0.1/keyboard-handler.js
index 0ccf1c7c2659..b5aaf4b5fd05 100644
--- a/extensions/amp-viewer-integration/0.1/keyboard-handler.js
+++ b/extensions/amp-viewer-integration/0.1/keyboard-handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Keys} from '#core/constants/key-codes';
 import {dict} from '#core/types/object';
 
diff --git a/extensions/amp-viewer-integration/0.1/messaging/messaging.js b/extensions/amp-viewer-integration/0.1/messaging/messaging.js
index 62383e59bd57..84400df00ef9 100644
--- a/extensions/amp-viewer-integration/0.1/messaging/messaging.js
+++ b/extensions/amp-viewer-integration/0.1/messaging/messaging.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const TAG = 'amp-viewer-messaging';
 const CHANNEL_OPEN_MSG = 'channelOpen';
 const HANDSHAKE_POLL_MSG = 'handshake-poll';
diff --git a/extensions/amp-viewer-integration/0.1/test/integration/test-amp-viewer-integration.js b/extensions/amp-viewer-integration/0.1/test/integration/test-amp-viewer-integration.js
index 6c2d50613eab..870f5f1189ce 100644
--- a/extensions/amp-viewer-integration/0.1/test/integration/test-amp-viewer-integration.js
+++ b/extensions/amp-viewer-integration/0.1/test/integration/test-amp-viewer-integration.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {done} from 'fetch-mock';
 
 import {getSourceUrl} from '../../../../../src/url';
diff --git a/extensions/amp-viewer-integration/0.1/test/integration/test-amp-webview-viewer-integration.js b/extensions/amp-viewer-integration/0.1/test/integration/test-amp-webview-viewer-integration.js
index 5cfebb36a60d..f8833d668798 100644
--- a/extensions/amp-viewer-integration/0.1/test/integration/test-amp-webview-viewer-integration.js
+++ b/extensions/amp-viewer-integration/0.1/test/integration/test-amp-webview-viewer-integration.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpViewerIntegration} from '../../amp-viewer-integration';
 import {WebviewViewerForTesting} from '../../webview-viewer-for-testing';
 
diff --git a/extensions/amp-viewer-integration/0.1/test/integration/test-messaging-handshake.js b/extensions/amp-viewer-integration/0.1/test/integration/test-messaging-handshake.js
index 5c58571d82cb..49a488c3ef38 100644
--- a/extensions/amp-viewer-integration/0.1/test/integration/test-messaging-handshake.js
+++ b/extensions/amp-viewer-integration/0.1/test/integration/test-messaging-handshake.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getWinOrigin, serializeQueryString} from '../../../../../src/url';
 import {Messaging} from '../../messaging/messaging';
 
diff --git a/extensions/amp-viewer-integration/0.1/test/integration/test-viewer-initiated-handshake.js b/extensions/amp-viewer-integration/0.1/test/integration/test-viewer-initiated-handshake.js
index 05fd3b296ad3..e3202a0a1da4 100644
--- a/extensions/amp-viewer-integration/0.1/test/integration/test-viewer-initiated-handshake.js
+++ b/extensions/amp-viewer-integration/0.1/test/integration/test-viewer-initiated-handshake.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {WebviewViewerForTesting} from '../../viewer-initiated-handshake-viewer-for-testing';
 
 describes.sandboxed('AmpWebviewViewerIntegration', {}, (env) => {
diff --git a/extensions/amp-viewer-integration/0.1/test/test-findtext.js b/extensions/amp-viewer-integration/0.1/test/test-findtext.js
index abe01d66da91..32e87f4a8a85 100644
--- a/extensions/amp-viewer-integration/0.1/test/test-findtext.js
+++ b/extensions/amp-viewer-integration/0.1/test/test-findtext.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   CircularBuffer,
   TextScanner,
diff --git a/extensions/amp-viewer-integration/0.1/test/test-focus-handler.js b/extensions/amp-viewer-integration/0.1/test/test-focus-handler.js
index f63bae305016..f7383a0629a7 100644
--- a/extensions/amp-viewer-integration/0.1/test/test-focus-handler.js
+++ b/extensions/amp-viewer-integration/0.1/test/test-focus-handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {FocusHandler} from '../focus-handler';
 import {Messaging} from '../messaging/messaging';
 
diff --git a/extensions/amp-viewer-integration/0.1/test/test-highlight-handler.js b/extensions/amp-viewer-integration/0.1/test/test-highlight-handler.js
index f7d1616ac4e4..c186a70f04e2 100644
--- a/extensions/amp-viewer-integration/0.1/test/test-highlight-handler.js
+++ b/extensions/amp-viewer-integration/0.1/test/test-highlight-handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {VisibilityState} from '#core/constants/visibility-state';
 import * as docready from '#core/document-ready';
 import {layoutRectLtwh} from '#core/dom/layout/rect';
diff --git a/extensions/amp-viewer-integration/0.1/test/test-keyboard-handler.js b/extensions/amp-viewer-integration/0.1/test/test-keyboard-handler.js
index f84650efd778..1f2190d9c362 100644
--- a/extensions/amp-viewer-integration/0.1/test/test-keyboard-handler.js
+++ b/extensions/amp-viewer-integration/0.1/test/test-keyboard-handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {KeyCodes, Keys} from '#core/constants/key-codes';
 
 import {KeyboardHandler} from '../keyboard-handler';
diff --git a/extensions/amp-viewer-integration/0.1/test/test-touch-handler.js b/extensions/amp-viewer-integration/0.1/test/test-touch-handler.js
index 8154c792c362..f6204831d093 100644
--- a/extensions/amp-viewer-integration/0.1/test/test-touch-handler.js
+++ b/extensions/amp-viewer-integration/0.1/test/test-touch-handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Messaging} from '../messaging/messaging';
 import {TouchHandler} from '../touch-handler';
 
diff --git a/extensions/amp-viewer-integration/0.1/touch-handler.js b/extensions/amp-viewer-integration/0.1/touch-handler.js
index e695a36f2266..198004b9e66c 100644
--- a/extensions/amp-viewer-integration/0.1/touch-handler.js
+++ b/extensions/amp-viewer-integration/0.1/touch-handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {listen} from '../../../src/event-helper';
diff --git a/extensions/amp-viewer-integration/0.1/viewer-for-testing.js b/extensions/amp-viewer-integration/0.1/viewer-for-testing.js
index 0f2c400e6ea6..7962622523de 100644
--- a/extensions/amp-viewer-integration/0.1/viewer-for-testing.js
+++ b/extensions/amp-viewer-integration/0.1/viewer-for-testing.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseUrlDeprecated, serializeQueryString} from '../../../src/url';
 
 const APP = '__AMPHTML__';
diff --git a/extensions/amp-viewer-integration/0.1/viewer-initiated-handshake-viewer-for-testing.js b/extensions/amp-viewer-integration/0.1/viewer-initiated-handshake-viewer-for-testing.js
index 2e0206bc5ad1..edd1a4fa4d29 100644
--- a/extensions/amp-viewer-integration/0.1/viewer-initiated-handshake-viewer-for-testing.js
+++ b/extensions/amp-viewer-integration/0.1/viewer-initiated-handshake-viewer-for-testing.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseUrlDeprecated, serializeQueryString} from '../../../src/url';
 
 const APP = '__AMPHTML__';
diff --git a/extensions/amp-viewer-integration/0.1/webview-viewer-for-testing.js b/extensions/amp-viewer-integration/0.1/webview-viewer-for-testing.js
index 00ac33f1d98f..4948cf7940fd 100644
--- a/extensions/amp-viewer-integration/0.1/webview-viewer-for-testing.js
+++ b/extensions/amp-viewer-integration/0.1/webview-viewer-for-testing.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Messaging} from './messaging/messaging';
 
 import {parseUrlDeprecated, serializeQueryString} from '../../../src/url';
diff --git a/extensions/amp-viewer-integration/CAPABILITIES.md b/extensions/amp-viewer-integration/CAPABILITIES.md
index 324b8e4b2b11..b6f4b01f1698 100644
--- a/extensions/amp-viewer-integration/CAPABILITIES.md
+++ b/extensions/amp-viewer-integration/CAPABILITIES.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 ### Viewer Capabilities
 
 Viewers can communicate their supported "capabilities" to documents through the
diff --git a/extensions/amp-viewer-integration/TICKEVENTS.md b/extensions/amp-viewer-integration/TICKEVENTS.md
index f2bb5aae2ada..0e127695b817 100644
--- a/extensions/amp-viewer-integration/TICKEVENTS.md
+++ b/extensions/amp-viewer-integration/TICKEVENTS.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 ### Tick Events
 
 When implementing a viewer one can use the tick events for performance tracking.
diff --git a/extensions/amp-viewer-integration/amp-doc-viewer-api.md b/extensions/amp-viewer-integration/amp-doc-viewer-api.md
index f7e123b8cf45..aa0c1e85ce4d 100644
--- a/extensions/amp-viewer-integration/amp-doc-viewer-api.md
+++ b/extensions/amp-viewer-integration/amp-doc-viewer-api.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2019 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP Viewer API
 
 ## Introduction
diff --git a/extensions/amp-viewer-integration/integrating-viewer-with-amp-doc-guide.md b/extensions/amp-viewer-integration/integrating-viewer-with-amp-doc-guide.md
index ec24b18fc52f..c89488a6fe5f 100644
--- a/extensions/amp-viewer-integration/integrating-viewer-with-amp-doc-guide.md
+++ b/extensions/amp-viewer-integration/integrating-viewer-with-amp-doc-guide.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Connecting AMP Viewers with AMP pages
 
 ## Introduction
diff --git a/extensions/amp-vimeo/0.1/amp-vimeo.js b/extensions/amp-vimeo/0.1/amp-vimeo.js
index 11ccf691288c..6196112c104e 100644
--- a/extensions/amp-vimeo/0.1/amp-vimeo.js
+++ b/extensions/amp-vimeo/0.1/amp-vimeo.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {dispatchCustomEvent, removeElement} from '#core/dom';
 import {isLayoutSizeDefined} from '#core/dom/layout';
 import {isAutoplaySupported} from '#core/dom/video';
diff --git a/extensions/amp-vimeo/0.1/test/test-amp-vimeo.js b/extensions/amp-vimeo/0.1/test/test-amp-vimeo.js
index 35da96b95c5c..ce8eef85bf8a 100644
--- a/extensions/amp-vimeo/0.1/test/test-amp-vimeo.js
+++ b/extensions/amp-vimeo/0.1/test/test-amp-vimeo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-vimeo';
 import * as VideoUtils from '#core/dom/video';
 
diff --git a/extensions/amp-vimeo/1.0/amp-vimeo.css b/extensions/amp-vimeo/1.0/amp-vimeo.css
index 07581d487732..2d31141a1156 100644
--- a/extensions/amp-vimeo/1.0/amp-vimeo.css
+++ b/extensions/amp-vimeo/1.0/amp-vimeo.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * Pre-upgrade:
diff --git a/extensions/amp-vimeo/1.0/amp-vimeo.js b/extensions/amp-vimeo/1.0/amp-vimeo.js
index a2a553b48a08..636d9ab15e73 100644
--- a/extensions/amp-vimeo/1.0/amp-vimeo.js
+++ b/extensions/amp-vimeo/1.0/amp-vimeo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isExperimentOn} from '#experiments';
 
 import {BaseElement} from './base-element';
diff --git a/extensions/amp-vimeo/1.0/base-element.js b/extensions/amp-vimeo/1.0/base-element.js
index 81a6f9f26f5b..6a9baa2e8412 100644
--- a/extensions/amp-vimeo/1.0/base-element.js
+++ b/extensions/amp-vimeo/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Vimeo} from './component';
 
 import {VideoBaseElement} from '../../amp-video/1.0/video-base-element';
diff --git a/extensions/amp-vimeo/1.0/component.js b/extensions/amp-vimeo/1.0/component.js
index 8f5080115dfc..924e35e9d6a1 100644
--- a/extensions/amp-vimeo/1.0/component.js
+++ b/extensions/amp-vimeo/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dispatchCustomEvent} from '#core/dom';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-vimeo/1.0/component.type.js b/extensions/amp-vimeo/1.0/component.type.js
index 6d69f37c49ac..d29ebce934a9 100644
--- a/extensions/amp-vimeo/1.0/component.type.js
+++ b/extensions/amp-vimeo/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-vimeo/1.0/storybook/Basic.amp.js b/extensions/amp-vimeo/1.0/storybook/Basic.amp.js
index 886704ab8dd9..3b1e37068153 100644
--- a/extensions/amp-vimeo/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-vimeo/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {boolean, text, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-vimeo/1.0/storybook/Basic.js b/extensions/amp-vimeo/1.0/storybook/Basic.js
index 6d3b07709680..b63a141781f7 100644
--- a/extensions/amp-vimeo/1.0/storybook/Basic.js
+++ b/extensions/amp-vimeo/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {boolean, number, text, withKnobs} from '@storybook/addon-knobs';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-vimeo/1.0/test/test-amp-vimeo.js b/extensions/amp-vimeo/1.0/test/test-amp-vimeo.js
index 3bfce774f621..24914a071fdb 100644
--- a/extensions/amp-vimeo/1.0/test/test-amp-vimeo.js
+++ b/extensions/amp-vimeo/1.0/test/test-amp-vimeo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-vimeo';
 import {htmlFor} from '#core/dom/static-template';
 
diff --git a/extensions/amp-vimeo/amp-vimeo.md b/extensions/amp-vimeo/amp-vimeo.md
index 887bf0798c03..facd9ce1cf01 100644
--- a/extensions/amp-vimeo/amp-vimeo.md
+++ b/extensions/amp-vimeo/amp-vimeo.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays a Vimeo video.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-vimeo
 
 ## Example
diff --git a/extensions/amp-vimeo/vimeo-api.js b/extensions/amp-vimeo/vimeo-api.js
index aaa5ef73b1fd..abf2aa80e666 100644
--- a/extensions/amp-vimeo/vimeo-api.js
+++ b/extensions/amp-vimeo/vimeo-api.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {dict} from '#core/types/object';
 
 import {postMessageWhenAvailable} from '../../src/iframe-video';
diff --git a/extensions/amp-vine/0.1/amp-vine.js b/extensions/amp-vine/0.1/amp-vine.js
index 4522e55a4b78..6e5855b69ea9 100644
--- a/extensions/amp-vine/0.1/amp-vine.js
+++ b/extensions/amp-vine/0.1/amp-vine.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
 import {PauseHelper} from '#core/dom/video/pause-helper';
 
diff --git a/extensions/amp-vine/0.1/test/test-amp-vine.js b/extensions/amp-vine/0.1/test/test-amp-vine.js
index f0890a2118a0..e7b24d1dbdee 100644
--- a/extensions/amp-vine/0.1/test/test-amp-vine.js
+++ b/extensions/amp-vine/0.1/test/test-amp-vine.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-vine';
 
 describes.realWin(
diff --git a/extensions/amp-vine/amp-vine.md b/extensions/amp-vine/amp-vine.md
index 790b090db035..4407f3135f73 100644
--- a/extensions/amp-vine/amp-vine.md
+++ b/extensions/amp-vine/amp-vine.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays a Vine simple embed.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-vine
 
 ## Example
diff --git a/extensions/amp-viqeo-player/0.1/amp-viqeo-player.js b/extensions/amp-viqeo-player/0.1/amp-viqeo-player.js
index 80de1b629a49..cef3e863f0f0 100644
--- a/extensions/amp-viqeo-player/0.1/amp-viqeo-player.js
+++ b/extensions/amp-viqeo-player/0.1/amp-viqeo-player.js
@@ -1,19 +1,4 @@
 /* eslint-disable no-unused-vars */
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 
 import {Deferred} from '#core/data-structures/promise';
 import {removeElement} from '#core/dom';
diff --git a/extensions/amp-viqeo-player/0.1/test/test-amp-viqeo-player.js b/extensions/amp-viqeo-player/0.1/test/test-amp-viqeo-player.js
index 0ddcd19e972e..dd6ad5fb4b00 100644
--- a/extensions/amp-viqeo-player/0.1/test/test-amp-viqeo-player.js
+++ b/extensions/amp-viqeo-player/0.1/test/test-amp-viqeo-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {listenOncePromise} from '../../../../src/event-helper';
diff --git a/extensions/amp-viqeo-player/amp-viqeo-player.md b/extensions/amp-viqeo-player/amp-viqeo-player.md
index cb6cef436083..8fc50885bb5f 100644
--- a/extensions/amp-viqeo-player/amp-viqeo-player.md
+++ b/extensions/amp-viqeo-player/amp-viqeo-player.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays a Viqeo video player.
 ---
 
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-viqeo-player
 
 ## Example
diff --git a/extensions/amp-vk/0.1/amp-vk.js b/extensions/amp-vk/0.1/amp-vk.js
index d59790cd162f..6ad883637263 100644
--- a/extensions/amp-vk/0.1/amp-vk.js
+++ b/extensions/amp-vk/0.1/amp-vk.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeElement} from '#core/dom';
 import {Layout, applyFillContent} from '#core/dom/layout';
 import {isEnumValue} from '#core/types';
diff --git a/extensions/amp-vk/0.1/test/test-amp-vk.js b/extensions/amp-vk/0.1/test/test-amp-vk.js
index 31cf47ac2d0f..d512240ddf90 100644
--- a/extensions/amp-vk/0.1/test/test-amp-vk.js
+++ b/extensions/amp-vk/0.1/test/test-amp-vk.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-vk';
 import {Layout} from '#core/dom/layout';
 
diff --git a/extensions/amp-web-push/0.1/test/test-web-push-config.js b/extensions/amp-web-push/0.1/test/test-web-push-config.js
index e331388dd54c..2f80c05d3bc2 100644
--- a/extensions/amp-web-push/0.1/test/test-web-push-config.js
+++ b/extensions/amp-web-push/0.1/test/test-web-push-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-web-push';
 import {WebPushConfigAttributes} from '../amp-web-push-config';
 import {CONFIG_TAG, TAG} from '../vars';
diff --git a/extensions/amp-web-push/0.1/test/test-web-push-permission-dialog.js b/extensions/amp-web-push/0.1/test/test-web-push-permission-dialog.js
index 278b8f77a733..30463cd3b2eb 100644
--- a/extensions/amp-web-push/0.1/test/test-web-push-permission-dialog.js
+++ b/extensions/amp-web-push/0.1/test/test-web-push-permission-dialog.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseUrlDeprecated} from '../../../../src/url';
 import {WebPushConfigAttributes} from '../amp-web-push-config';
 import {AmpWebPushPermissionDialog} from '../amp-web-push-permission-dialog';
diff --git a/extensions/amp-web-push/0.1/test/test-web-push-service.js b/extensions/amp-web-push/0.1/test/test-web-push-service.js
index 7c4c21895169..a709bc0d9e4f 100644
--- a/extensions/amp-web-push/0.1/test/test-web-push-service.js
+++ b/extensions/amp-web-push/0.1/test/test-web-push-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as mode from '../../../../src/mode';
 import {WebPushConfigAttributes} from '../amp-web-push-config';
 import {AmpWebPushHelperFrame} from '../amp-web-push-helper-frame';
diff --git a/extensions/amp-wistia-player/0.1/amp-wistia-player.js b/extensions/amp-wistia-player/0.1/amp-wistia-player.js
index 059562930484..753a5e995b4c 100644
--- a/extensions/amp-wistia-player/0.1/amp-wistia-player.js
+++ b/extensions/amp-wistia-player/0.1/amp-wistia-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {dispatchCustomEvent, removeElement} from '#core/dom';
 import {
diff --git a/extensions/amp-wistia-player/0.1/test/test-amp-wistia-player.js b/extensions/amp-wistia-player/0.1/test/test-amp-wistia-player.js
index 6e784a503534..a2682aab02a2 100644
--- a/extensions/amp-wistia-player/0.1/test/test-amp-wistia-player.js
+++ b/extensions/amp-wistia-player/0.1/test/test-amp-wistia-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-wistia-player';
 import * as fullscreen from '#core/dom/fullscreen';
 
diff --git a/extensions/amp-wistia-player/amp-wistia-player.md b/extensions/amp-wistia-player/amp-wistia-player.md
index d65786868723..3b66852b0005 100644
--- a/extensions/amp-wistia-player/amp-wistia-player.md
+++ b/extensions/amp-wistia-player/amp-wistia-player.md
@@ -6,22 +6,6 @@ teaser:
   text: Displays a Wistia video.
 ---
 
-<!---
-Copyright 2018 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-wistia-player
 
 ## Example
diff --git a/extensions/amp-wordpress-embed/1.0/amp-wordpress-embed.js b/extensions/amp-wordpress-embed/1.0/amp-wordpress-embed.js
index c16bcfc8a778..12728c0eba3e 100644
--- a/extensions/amp-wordpress-embed/1.0/amp-wordpress-embed.js
+++ b/extensions/amp-wordpress-embed/1.0/amp-wordpress-embed.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {isExperimentOn} from '#experiments';
diff --git a/extensions/amp-wordpress-embed/1.0/base-element.js b/extensions/amp-wordpress-embed/1.0/base-element.js
index db0403898196..df526a1e0179 100644
--- a/extensions/amp-wordpress-embed/1.0/base-element.js
+++ b/extensions/amp-wordpress-embed/1.0/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {PreactBaseElement} from '#preact/base-element';
 
 import {WordPressEmbed} from './component';
diff --git a/extensions/amp-wordpress-embed/1.0/component.js b/extensions/amp-wordpress-embed/1.0/component.js
index 687ed16e70ad..f30426d29bb2 100644
--- a/extensions/amp-wordpress-embed/1.0/component.js
+++ b/extensions/amp-wordpress-embed/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-wordpress-embed/1.0/component.type.js b/extensions/amp-wordpress-embed/1.0/component.type.js
index f61893db4c49..1facedda9cb1 100644
--- a/extensions/amp-wordpress-embed/1.0/component.type.js
+++ b/extensions/amp-wordpress-embed/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/extensions/amp-wordpress-embed/1.0/storybook/Basic.amp.js b/extensions/amp-wordpress-embed/1.0/storybook/Basic.amp.js
index d2bed9381fcf..16eec0bb88b7 100644
--- a/extensions/amp-wordpress-embed/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-wordpress-embed/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {number, text, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-wordpress-embed/1.0/storybook/Basic.js b/extensions/amp-wordpress-embed/1.0/storybook/Basic.js
index 95df2c33e47e..51c41213d4c4 100644
--- a/extensions/amp-wordpress-embed/1.0/storybook/Basic.js
+++ b/extensions/amp-wordpress-embed/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {number, text, withKnobs} from '@storybook/addon-knobs';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-wordpress-embed/1.0/test/test-amp-wordpress-embed.js b/extensions/amp-wordpress-embed/1.0/test/test-amp-wordpress-embed.js
index d919543ece08..69e90d5cc3aa 100644
--- a/extensions/amp-wordpress-embed/1.0/test/test-amp-wordpress-embed.js
+++ b/extensions/amp-wordpress-embed/1.0/test/test-amp-wordpress-embed.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-wordpress-embed';
 import {createElementWithAttributes} from '#core/dom';
 
diff --git a/extensions/amp-yotpo/0.1/amp-yotpo.js b/extensions/amp-yotpo/0.1/amp-yotpo.js
index 8fcebcd74a15..17f30b067582 100644
--- a/extensions/amp-yotpo/0.1/amp-yotpo.js
+++ b/extensions/amp-yotpo/0.1/amp-yotpo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeElement} from '#core/dom';
 import {applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
 
diff --git a/extensions/amp-yotpo/0.1/test/test-amp-yotpo.js b/extensions/amp-yotpo/0.1/test/test-amp-yotpo.js
index 14ed9effc786..640d5dacf0b4 100644
--- a/extensions/amp-yotpo/0.1/test/test-amp-yotpo.js
+++ b/extensions/amp-yotpo/0.1/test/test-amp-yotpo.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-yotpo';
 import {yotpo} from '#3p/yotpo';
 
diff --git a/extensions/amp-youtube/0.1/amp-youtube.js b/extensions/amp-youtube/0.1/amp-youtube.js
index 4a2afc678d9d..47f9493a9022 100644
--- a/extensions/amp-youtube/0.1/amp-youtube.js
+++ b/extensions/amp-youtube/0.1/amp-youtube.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {
   dispatchCustomEvent,
diff --git a/extensions/amp-youtube/0.1/amp-youtube.md b/extensions/amp-youtube/0.1/amp-youtube.md
index e53f585f6f36..231ee1edd262 100644
--- a/extensions/amp-youtube/0.1/amp-youtube.md
+++ b/extensions/amp-youtube/0.1/amp-youtube.md
@@ -7,22 +7,6 @@ teaser:
   text: Displays a YouTube video.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-youtube
 
 ## Usage
diff --git a/extensions/amp-youtube/0.1/storybook/Basic.amp.js b/extensions/amp-youtube/0.1/storybook/Basic.amp.js
index 1249b04eec55..d8abfc23092f 100644
--- a/extensions/amp-youtube/0.1/storybook/Basic.amp.js
+++ b/extensions/amp-youtube/0.1/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {text, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-youtube/0.1/test/test-amp-youtube.js b/extensions/amp-youtube/0.1/test/test-amp-youtube.js
index a7bfec1c15f6..c5bf59472bd1 100644
--- a/extensions/amp-youtube/0.1/test/test-amp-youtube.js
+++ b/extensions/amp-youtube/0.1/test/test-amp-youtube.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-youtube';
 import {Services} from '#service';
 
diff --git a/extensions/amp-youtube/1.0/amp-youtube.css b/extensions/amp-youtube/1.0/amp-youtube.css
index d7c9248636fc..7b98f3e0c1cc 100644
--- a/extensions/amp-youtube/1.0/amp-youtube.css
+++ b/extensions/amp-youtube/1.0/amp-youtube.css
@@ -1,18 +1,4 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /*
  * Pre-upgrade:
diff --git a/extensions/amp-youtube/1.0/amp-youtube.js b/extensions/amp-youtube/1.0/amp-youtube.js
index 06ad5773f3cf..2d3aa6890357 100644
--- a/extensions/amp-youtube/1.0/amp-youtube.js
+++ b/extensions/amp-youtube/1.0/amp-youtube.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isExperimentOn} from '#experiments';
 
 import {BaseElement} from './base-element';
diff --git a/extensions/amp-youtube/1.0/base-element.js b/extensions/amp-youtube/1.0/base-element.js
index 1bca266236bd..857b9d458a53 100644
--- a/extensions/amp-youtube/1.0/base-element.js
+++ b/extensions/amp-youtube/1.0/base-element.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Youtube} from './component';
 
 import {VideoBaseElement} from '../../amp-video/1.0/video-base-element';
diff --git a/extensions/amp-youtube/1.0/component.js b/extensions/amp-youtube/1.0/component.js
index 7cb12e63fe41..355aa6e03bff 100644
--- a/extensions/amp-youtube/1.0/component.js
+++ b/extensions/amp-youtube/1.0/component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dispatchCustomEvent} from '#core/dom';
 import {dict} from '#core/types/object';
 
diff --git a/extensions/amp-youtube/1.0/component.type.js b/extensions/amp-youtube/1.0/component.type.js
index 7a2f51100c6a..c842c8315b3f 100644
--- a/extensions/amp-youtube/1.0/component.type.js
+++ b/extensions/amp-youtube/1.0/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /**
diff --git a/extensions/amp-youtube/1.0/storybook/Basic.amp.js b/extensions/amp-youtube/1.0/storybook/Basic.amp.js
index 064cc77e5b42..e00c3e5c3f0c 100644
--- a/extensions/amp-youtube/1.0/storybook/Basic.amp.js
+++ b/extensions/amp-youtube/1.0/storybook/Basic.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {boolean, number, text, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/extensions/amp-youtube/1.0/storybook/Basic.js b/extensions/amp-youtube/1.0/storybook/Basic.js
index 3dfb2e3529f0..f48ce1d3aab3 100644
--- a/extensions/amp-youtube/1.0/storybook/Basic.js
+++ b/extensions/amp-youtube/1.0/storybook/Basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {boolean, number, object, text, withKnobs} from '@storybook/addon-knobs';
 
 import * as Preact from '#preact';
diff --git a/extensions/amp-youtube/1.0/test/test-amp-youtube.js b/extensions/amp-youtube/1.0/test/test-amp-youtube.js
index a5438f70ec49..88480e6355cf 100644
--- a/extensions/amp-youtube/1.0/test/test-amp-youtube.js
+++ b/extensions/amp-youtube/1.0/test/test-amp-youtube.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '../amp-youtube';
 import {createElementWithAttributes} from '#core/dom';
 
diff --git a/extensions/amp-youtube/1.0/test/test-component.js b/extensions/amp-youtube/1.0/test/test-component.js
index 6755fe5c6721..e706319ee156 100644
--- a/extensions/amp-youtube/1.0/test/test-component.js
+++ b/extensions/amp-youtube/1.0/test/test-component.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {mount} from 'enzyme';
 
 import {dispatchCustomEvent} from '#core/dom';
diff --git a/extensions/amp-youtube/amp-youtube.md b/extensions/amp-youtube/amp-youtube.md
index 2d1ea0208457..05db6199d7ba 100644
--- a/extensions/amp-youtube/amp-youtube.md
+++ b/extensions/amp-youtube/amp-youtube.md
@@ -8,22 +8,6 @@ experimental: true
 bento: true
 ---
 
-<!---
-Copyright 2021 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-youtube
 
 ## Usage
diff --git a/package-scripts.js b/package-scripts.js
index f93afd1fc774..232c610a45dd 100644
--- a/package-scripts.js
+++ b/package-scripts.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/src/.eslintrc.js b/src/.eslintrc.js
index 860b7b585980..baf9d0f17172 100644
--- a/src/.eslintrc.js
+++ b/src/.eslintrc.js
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 const {isCiBuild} = require('../build-system/common/ci');
 
 module.exports = {
diff --git a/src/3p-frame.js b/src/3p-frame.js
index 994bcc2165d0..59014258a13d 100644
--- a/src/3p-frame.js
+++ b/src/3p-frame.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getOptionalSandboxFlags, getRequiredSandboxFlags} from '#core/3p-frame';
 import {setStyle} from '#core/dom/style';
 import * as mode from '#core/mode';
diff --git a/src/ad-cid.js b/src/ad-cid.js
index 4f0b0b499cd8..6c9489e1768b 100644
--- a/src/ad-cid.js
+++ b/src/ad-cid.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {adConfig} from '#ads/_config';
 
 import {Services} from '#service';
diff --git a/src/ad-helper.js b/src/ad-helper.js
index d30158968001..6deadf51b5b1 100644
--- a/src/ad-helper.js
+++ b/src/ad-helper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {computedStyle} from '#core/dom/style';
 
 import {dev} from './log';
diff --git a/src/amp-shadow.js b/src/amp-shadow.js
index 942d1ccfd98b..cb944043b4a7 100644
--- a/src/amp-shadow.js
+++ b/src/amp-shadow.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * The entry point for AMP Runtime (v0.js) when AMP Runtime may support
  * multiple AMP Docs in Shadow DOM.
diff --git a/src/amp-story-player/amp-story-component-manager.js b/src/amp-story-player/amp-story-component-manager.js
index a1d0b6c31420..ae5756d95191 100644
--- a/src/amp-story-player/amp-story-component-manager.js
+++ b/src/amp-story-player/amp-story-component-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpStoryEntryPoint} from './amp-story-entry-point/amp-story-entry-point-impl';
 import {AmpStoryPlayer} from './amp-story-player-impl';
 import {AmpStoryPlayerViewportObserver} from './amp-story-player-viewport-observer';
diff --git a/src/amp-story-player/amp-story-entry-point/amp-story-entry-point-impl.js b/src/amp-story-player/amp-story-entry-point/amp-story-entry-point-impl.js
index e94d2d84012a..0a4ec9fe4ff6 100644
--- a/src/amp-story-player/amp-story-entry-point/amp-story-entry-point-impl.js
+++ b/src/amp-story-player/amp-story-entry-point/amp-story-entry-point-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Source for this constant is css/amp-story-entry-point.css
 import {cssText} from '../../../build/amp-story-entry-point.css';
 
diff --git a/src/amp-story-player/amp-story-entry-point/amp-story-entry-point.js b/src/amp-story-player/amp-story-entry-point/amp-story-entry-point.js
index fd4784f002f8..d03526865df2 100644
--- a/src/amp-story-player/amp-story-entry-point/amp-story-entry-point.js
+++ b/src/amp-story-player/amp-story-entry-point/amp-story-entry-point.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpStoryComponentManager} from '../amp-story-component-manager';
 
 self.onload = () => {
diff --git a/src/amp-story-player/amp-story-player-impl.js b/src/amp-story-player/amp-story-player-impl.js
index 37a1260cb7f7..2b28410a0484 100644
--- a/src/amp-story-player/amp-story-player-impl.js
+++ b/src/amp-story-player/amp-story-player-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as ampToolboxCacheUrl from '@ampproject/toolbox-cache-url';
 import {Messaging} from '@ampproject/viewer-messaging';
 
diff --git a/src/amp-story-player/amp-story-player-viewport-observer.js b/src/amp-story-player/amp-story-player-viewport-observer.js
index 97cbd4af480b..a31ff4e46fab 100644
--- a/src/amp-story-player/amp-story-player-viewport-observer.js
+++ b/src/amp-story-player/amp-story-player-viewport-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {throttle} from '#core/types/function';
 
 /** @const {number} */
diff --git a/src/amp-story-player/amp-story-player.js b/src/amp-story-player/amp-story-player.js
index 9ad7f11496ec..62432c077d08 100644
--- a/src/amp-story-player/amp-story-player.js
+++ b/src/amp-story-player/amp-story-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {onDocumentReady} from '#core/document-ready';
 
 import {AmpStoryComponentManager} from './amp-story-component-manager';
diff --git a/src/amp-story-player/page-scroller.js b/src/amp-story-player/page-scroller.js
index 4a3661c46744..992220913d15 100644
--- a/src/amp-story-player/page-scroller.js
+++ b/src/amp-story-player/page-scroller.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {throttle} from '#core/types/function';
 
 /**
diff --git a/src/amp.js b/src/amp.js
index 6ad1e950fb90..48d8e8c21bc4 100644
--- a/src/amp.js
+++ b/src/amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * The entry point for AMP Runtime (v0.js) when AMP Runtime = AMP Doc.
  */
diff --git a/src/analytics.js b/src/analytics.js
index 4c51878e3168..875df753a1a7 100644
--- a/src/analytics.js
+++ b/src/analytics.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {Services} from '#service';
diff --git a/src/animation.js b/src/animation.js
index 88bf3ab82f9c..5991ce32e9f8 100644
--- a/src/animation.js
+++ b/src/animation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {NormTimeDef, getCurve} from '#core/data-structures/curve';
 import {Deferred} from '#core/data-structures/promise';
 import {TimestampDef} from '#core/types/date';
diff --git a/src/auto-lightbox.js b/src/auto-lightbox.js
index cdf96996282f..4e4eacfac02a 100644
--- a/src/auto-lightbox.js
+++ b/src/auto-lightbox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {ChunkPriority, chunk} from './chunk';
diff --git a/src/base-element.js b/src/base-element.js
index 6cedefce6553..52bcadb9b098 100644
--- a/src/base-element.js
+++ b/src/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust, DEFAULT_ACTION} from '#core/constants/action-constants';
 import {dispatchCustomEvent} from '#core/dom';
 import {Layout, LayoutPriority} from '#core/dom/layout';
diff --git a/src/base-template.js b/src/base-template.js
index 3b8eb6a79621..b8ad7f2588d2 100644
--- a/src/base-template.js
+++ b/src/base-template.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isElement} from '#core/types';
 
 import {Services} from '#service';
diff --git a/src/batched-json.js b/src/batched-json.js
index a74cb5aca0d2..e91ecf1a8ba1 100644
--- a/src/batched-json.js
+++ b/src/batched-json.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getValueForExpr} from '#core/types/object';
 
 import {Services} from '#service';
diff --git a/src/builtins/amp-img/amp-img.js b/src/builtins/amp-img/amp-img.js
index c22e3b52b0ad..45786764f9b0 100644
--- a/src/builtins/amp-img/amp-img.js
+++ b/src/builtins/amp-img/amp-img.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ReadyState} from '#core/constants/ready-state';
 import {removeElement} from '#core/dom';
 import {guaranteeSrcForSrcsetUnsupportedBrowsers} from '#core/dom/img';
diff --git a/src/builtins/amp-img/amp-img.md b/src/builtins/amp-img/amp-img.md
index 80b6cc4da6ec..3b7185460904 100644
--- a/src/builtins/amp-img/amp-img.md
+++ b/src/builtins/amp-img/amp-img.md
@@ -9,22 +9,6 @@ teaser:
   text: Replaces the HTML5 img tag.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-img
 
 ## Usage
diff --git a/src/builtins/amp-layout/amp-layout.js b/src/builtins/amp-layout/amp-layout.js
index 3bfbb61325d8..9482e6fc3a32 100644
--- a/src/builtins/amp-layout/amp-layout.js
+++ b/src/builtins/amp-layout/amp-layout.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Layout, applyFillContent, isLayoutSizeDefined} from '#core/dom/layout';
 import {realChildNodes} from '#core/dom/query';
 
diff --git a/src/builtins/amp-layout/amp-layout.md b/src/builtins/amp-layout/amp-layout.md
index a34be97218d4..59baa03dde7d 100644
--- a/src/builtins/amp-layout/amp-layout.md
+++ b/src/builtins/amp-layout/amp-layout.md
@@ -9,22 +9,6 @@ teaser:
   text: A generic, multi-purpose container element that brings AMP's powerful layouts to any element.
 ---
 
-<!---
-Copyright 2016 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # amp-layout <a name="amp-layout"></a>
 
 ## Usage
diff --git a/src/builtins/amp-pixel/amp-pixel.js b/src/builtins/amp-pixel/amp-pixel.js
index aef4d22fa144..6bf759d6d171 100644
--- a/src/builtins/amp-pixel/amp-pixel.js
+++ b/src/builtins/amp-pixel/amp-pixel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {registerElement} from '#service/custom-element-registry';
 
diff --git a/src/builtins/amp-pixel/amp-pixel.md b/src/builtins/amp-pixel/amp-pixel.md
index 707421d34a61..78410c415e91 100644
--- a/src/builtins/amp-pixel/amp-pixel.md
+++ b/src/builtins/amp-pixel/amp-pixel.md
@@ -8,22 +8,6 @@ teaser:
   text: A tracking pixel to count page views.
 ---
 
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # <a name="amp-pixel"></a> `amp-pixel`
 
 [TOC]
diff --git a/src/builtins/storybook/amp-layout-with-aspect-ratio-css.amp.js b/src/builtins/storybook/amp-layout-with-aspect-ratio-css.amp.js
index ec8778afb036..5c47f4f04dfc 100644
--- a/src/builtins/storybook/amp-layout-with-aspect-ratio-css.amp.js
+++ b/src/builtins/storybook/amp-layout-with-aspect-ratio-css.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {number, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/src/builtins/storybook/amp-layout.amp.js b/src/builtins/storybook/amp-layout.amp.js
index 5e00f98fc1e8..f4f0a9018a9c 100644
--- a/src/builtins/storybook/amp-layout.amp.js
+++ b/src/builtins/storybook/amp-layout.amp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {withAmp} from '@ampproject/storybook-addon';
 import {number, withKnobs} from '@storybook/addon-knobs';
 
diff --git a/src/chunk.js b/src/chunk.js
index 26c4a41b2990..fc6dc1c34b63 100644
--- a/src/chunk.js
+++ b/src/chunk.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {PriorityQueue} from '#core/data-structures/priority-queue';
 
 import {Services} from '#service';
diff --git a/src/compiler/builders.js b/src/compiler/builders.js
index e437a8d6da01..1792a3e95f7e 100644
--- a/src/compiler/builders.js
+++ b/src/compiler/builders.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {buildDom as ampLayoutClassic} from '#builtins/amp-layout/amp-layout';
 
 import {buildDom as ampFitTextClassic} from '../../extensions/amp-fit-text/0.1/amp-fit-text';
diff --git a/src/compiler/index.js b/src/compiler/index.js
index 1223c1900e34..dc04dd60c363 100644
--- a/src/compiler/index.js
+++ b/src/compiler/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as compiler from '@ampproject/bento-compiler';
 
 import {getBuilders} from './builders';
diff --git a/src/compiler/shame.extern.js b/src/compiler/shame.extern.js
index 0a7ba6d2e5d9..bd35a7916a7d 100644
--- a/src/compiler/shame.extern.js
+++ b/src/compiler/shame.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview The junk-drawer of externs that haven't yet been sorted well.
  * Shame! Shame! Shame! Avoid adding to this.
diff --git a/src/compiler/types.js b/src/compiler/types.js
index 977593f569e9..0c72a2ba0342 100644
--- a/src/compiler/types.js
+++ b/src/compiler/types.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * AMP Components must implement this "buildDom" function in order to be server-rendered.
  *
diff --git a/src/config.js b/src/config.js
index 3d9fd9a32984..c33d90e859a9 100644
--- a/src/config.js
+++ b/src/config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Allows for runtime configuration. Internally, the runtime should
  * use the src/config.js module for various constants. We can use the
diff --git a/src/consent.js b/src/consent.js
index bbe3addda5f9..d39cd63234f3 100644
--- a/src/consent.js
+++ b/src/consent.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   CONSENT_POLICY_STATE, // eslint-disable-line no-unused-vars
 } from '#core/constants/consent-state';
diff --git a/src/cookies.js b/src/cookies.js
index ad53a625538a..1dfd2b241b96 100644
--- a/src/cookies.js
+++ b/src/cookies.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {endsWith} from '#core/types/string';
 import {tryDecodeUriComponent} from '#core/types/string/url';
 
diff --git a/src/core/3p-frame-messaging.js b/src/core/3p-frame-messaging.js
index ded8c64aa891..ede0a71dfb1d 100644
--- a/src/core/3p-frame-messaging.js
+++ b/src/core/3p-frame-messaging.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert, devAssertString} from '#core/assert';
 import {internalListenImplementation} from '#core/dom/event-helper-listen';
 import {rethrowAsync} from '#core/error';
diff --git a/src/core/3p-frame.js b/src/core/3p-frame.js
index ad64abea6be1..9e8a036d161b 100644
--- a/src/core/3p-frame.js
+++ b/src/core/3p-frame.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Required flags to apply to the sandbox iframe.
  * @return {Array<string>}
diff --git a/src/core/amp-config.extern.js b/src/core/amp-config.extern.js
index 1e969b858232..d093bfe22fdd 100644
--- a/src/core/amp-config.extern.js
+++ b/src/core/amp-config.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Externs for properties on global AMP_CONFIG.
  * @externs
diff --git a/src/core/assert/base.js b/src/core/assert/base.js
index fb0f8c7d24cb..a09fe1974af0 100644
--- a/src/core/assert/base.js
+++ b/src/core/assert/base.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {elementStringOrPassThru} from '#core/error/message-helpers';
 import {isArray, isElement, isString} from '#core/types';
 import {remove} from '#core/types/array';
diff --git a/src/core/assert/dev.js b/src/core/assert/dev.js
index 977ed7d2fb44..3b16a1b769a8 100644
--- a/src/core/assert/dev.js
+++ b/src/core/assert/dev.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as mode from '#core/mode';
 
 import * as assertions from './base';
diff --git a/src/core/assert/index.js b/src/core/assert/index.js
index 3800e6aa8b4d..281256276ad8 100644
--- a/src/core/assert/index.js
+++ b/src/core/assert/index.js
@@ -1,18 +1,2 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 export * from './dev';
 export * from './user';
diff --git a/src/core/assert/user.js b/src/core/assert/user.js
index 3ee9ba370a15..241b528fcb1d 100644
--- a/src/core/assert/user.js
+++ b/src/core/assert/user.js
@@ -1,34 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {USER_ERROR_SENTINEL} from '#core/error/message-helpers';
 
 import * as assertions from './base';
diff --git a/src/core/constants/action-constants.js b/src/core/constants/action-constants.js
index 9529f2644e4d..33c2314164be 100644
--- a/src/core/constants/action-constants.js
+++ b/src/core/constants/action-constants.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert} from '#core/assert';
 
 /**
diff --git a/src/core/constants/amp-events.js b/src/core/constants/amp-events.js
index 7dfbb21f45e5..da569e647b2a 100644
--- a/src/core/constants/amp-events.js
+++ b/src/core/constants/amp-events.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Common AMP events.
  * @enum {string}
diff --git a/src/core/constants/async-input.js b/src/core/constants/async-input.js
index 75bf71f951a5..59d6cbd36008 100644
--- a/src/core/constants/async-input.js
+++ b/src/core/constants/async-input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Interface for all AMP Async Input Elements.
  * enforces the overridable function, getValue().
diff --git a/src/core/constants/common-signals.js b/src/core/constants/common-signals.js
index 0f85a63e9ad4..6ce2105a1988 100644
--- a/src/core/constants/common-signals.js
+++ b/src/core/constants/common-signals.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Commonly used signals across different elements and documents.
  * @enum {string}
diff --git a/src/core/constants/consent-state.js b/src/core/constants/consent-state.js
index 079e93152f8c..5826592c53ed 100644
--- a/src/core/constants/consent-state.js
+++ b/src/core/constants/consent-state.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // This file will be imported by 3P scripts.
 
 /**
diff --git a/src/core/constants/enums.js b/src/core/constants/enums.js
index eb67c3137550..957cc35ac540 100644
--- a/src/core/constants/enums.js
+++ b/src/core/constants/enums.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Registred singleton on AMP doc.
  * @enum {number}
diff --git a/src/core/constants/key-codes.js b/src/core/constants/key-codes.js
index 6db3a0a45b07..964a76999499 100644
--- a/src/core/constants/key-codes.js
+++ b/src/core/constants/key-codes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @enum {number}
  */
diff --git a/src/core/constants/loading-instructions.js b/src/core/constants/loading-instructions.js
index 9715d80127d0..568be866819c 100644
--- a/src/core/constants/loading-instructions.js
+++ b/src/core/constants/loading-instructions.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * An expanded set of loading instructions based on
  * https://developer.mozilla.org/en-US/docs/Web/Performance/Lazy_loading.
diff --git a/src/core/constants/ready-state.js b/src/core/constants/ready-state.js
index b8e0f4cd37da..b0468225e27b 100644
--- a/src/core/constants/ready-state.js
+++ b/src/core/constants/ready-state.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * An AMP element's ready state.
  *
diff --git a/src/core/constants/visibility-state.js b/src/core/constants/visibility-state.js
index 31e33b4d927a..e85dfed64e45 100644
--- a/src/core/constants/visibility-state.js
+++ b/src/core/constants/visibility-state.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Visibility state of the AMP document.
  * @enum {string}
diff --git a/src/core/context/index.js b/src/core/context/index.js
index 4f7d977c1656..8a004721bf3d 100644
--- a/src/core/context/index.js
+++ b/src/core/context/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ContextNode} from './node';
 import {ContextPropDef} from './prop.type';
 
diff --git a/src/core/context/node.js b/src/core/context/node.js
index f864d1d78187..a8181bd79f67 100644
--- a/src/core/context/node.js
+++ b/src/core/context/node.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert, devAssertElement} from '#core/assert';
 import * as mode from '#core/mode';
 import {pushIfNotExist, removeItem} from '#core/types/array';
diff --git a/src/core/context/prop.js b/src/core/context/prop.js
index 44a1d8601546..7b4b2f8e8f11 100644
--- a/src/core/context/prop.js
+++ b/src/core/context/prop.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert} from '#core/assert';
 
 import {ContextPropDef} from './prop.type';
diff --git a/src/core/context/prop.type.js b/src/core/context/prop.type.js
index 3d7eb3b8a953..e8cf48e12931 100644
--- a/src/core/context/prop.type.js
+++ b/src/core/context/prop.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * A context property.
  *
diff --git a/src/core/context/scan.js b/src/core/context/scan.js
index 0d5c16bd8163..a7d69316c702 100644
--- a/src/core/context/scan.js
+++ b/src/core/context/scan.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Performs the `closest()` scan through context nodes to find the one that
  * matches the predicate with an optional argument.
diff --git a/src/core/context/scheduler.js b/src/core/context/scheduler.js
index d369d7a35ae8..5d48c19025e6 100644
--- a/src/core/context/scheduler.js
+++ b/src/core/context/scheduler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @typedef {function(function())} */
 let SchedulerDef;
 /**
diff --git a/src/core/context/subscriber.js b/src/core/context/subscriber.js
index 0084061062a8..db18f093b80f 100644
--- a/src/core/context/subscriber.js
+++ b/src/core/context/subscriber.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {tryCallback} from '#core/error';
 import {arrayOrSingleItemToArray} from '#core/types/array';
 
diff --git a/src/core/context/values.js b/src/core/context/values.js
index e03794ad20c1..4f96548b68c8 100644
--- a/src/core/context/values.js
+++ b/src/core/context/values.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert} from '#core/assert';
 import {rethrowAsync} from '#core/error';
 import {pushIfNotExist, removeItem} from '#core/types/array';
diff --git a/src/core/data-structures/curve.js b/src/core/data-structures/curve.js
index 77ffbc032fd1..30c5b934f878 100644
--- a/src/core/data-structures/curve.js
+++ b/src/core/data-structures/curve.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isString} from '#core/types';
 
 /**
diff --git a/src/core/data-structures/dom-based-weakref.js b/src/core/data-structures/dom-based-weakref.js
index 213ef27c0916..268202b1797d 100644
--- a/src/core/data-structures/dom-based-weakref.js
+++ b/src/core/data-structures/dom-based-weakref.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * A `WeakRef` polyfill that works for DOM Elements only.
  *
diff --git a/src/core/data-structures/finite-state-machine.js b/src/core/data-structures/finite-state-machine.js
index 01198df21630..e1ada7d61ee7 100644
--- a/src/core/data-structures/finite-state-machine.js
+++ b/src/core/data-structures/finite-state-machine.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert} from '#core/assert';
 import {map} from '#core/types/object';
 
diff --git a/src/core/data-structures/id-generator.js b/src/core/data-structures/id-generator.js
index 123ecf614e7d..479dd851ce65 100644
--- a/src/core/data-structures/id-generator.js
+++ b/src/core/data-structures/id-generator.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Returns the "next" function that generates a new sequential ID on each call.
  * @return {function():string}
diff --git a/src/core/data-structures/lru-cache.js b/src/core/data-structures/lru-cache.js
index b0f36da0d479..57f687f2ab65 100644
--- a/src/core/data-structures/lru-cache.js
+++ b/src/core/data-structures/lru-cache.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {map} from '#core/types/object';
 
 /**
diff --git a/src/core/data-structures/observable.js b/src/core/data-structures/observable.js
index 2e8e7c9e4c16..a8f11e8c9c83 100644
--- a/src/core/data-structures/observable.js
+++ b/src/core/data-structures/observable.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeItem} from '#core/types/array';
 
 /**
diff --git a/src/core/data-structures/priority-queue.js b/src/core/data-structures/priority-queue.js
index 3a69f8de03c5..df6e8fe21b04 100644
--- a/src/core/data-structures/priority-queue.js
+++ b/src/core/data-structures/priority-queue.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * A priority queue backed with sorted array.
  * @template T
diff --git a/src/core/data-structures/promise.js b/src/core/data-structures/promise.js
index 5b88e35b9f0e..c5d05b382f03 100644
--- a/src/core/data-structures/promise.js
+++ b/src/core/data-structures/promise.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 let resolved;
 
 /**
diff --git a/src/core/data-structures/signals.js b/src/core/data-structures/signals.js
index 86b6b47e7967..9311dcc72744 100644
--- a/src/core/data-structures/signals.js
+++ b/src/core/data-structures/signals.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {TimestampDef} from '#core/types/date';
 import {map} from '#core/types/object';
 
diff --git a/src/core/document-ready.js b/src/core/document-ready.js
index 366781350300..f6c05c07a10e 100644
--- a/src/core/document-ready.js
+++ b/src/core/document-ready.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Whether the document is ready.
  * @param {!Document} doc
diff --git a/src/core/document-visibility.js b/src/core/document-visibility.js
index 3d9ad8c4a8d2..5f47ecc0aa14 100644
--- a/src/core/document-visibility.js
+++ b/src/core/document-visibility.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {VisibilityState} from './constants/visibility-state';
 import {getVendorJsPropertyName} from './dom/style';
 
diff --git a/src/core/dom/amp-element-helpers.js b/src/core/dom/amp-element-helpers.js
index a010c8ac21f8..a393b23bf8c5 100644
--- a/src/core/dom/amp-element-helpers.js
+++ b/src/core/dom/amp-element-helpers.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {devAssert} from '#core/assert';
 import {Deferred} from '#core/data-structures/promise';
 
diff --git a/src/core/dom/amp-element.extern.js b/src/core/dom/amp-element.extern.js
index 17a175940491..c8ea3b463fb4 100644
--- a/src/core/dom/amp-element.extern.js
+++ b/src/core/dom/amp-element.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Provides AmpElement interface for typechecking. Includes
  * smaller interfaces that modules can type-check against to keep expected
diff --git a/src/core/dom/css-selectors.js b/src/core/dom/css-selectors.js
index c2f39ca0d6e2..f3aec22d21a7 100644
--- a/src/core/dom/css-selectors.js
+++ b/src/core/dom/css-selectors.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert} from '#core/assert';
 import * as mode from '#core/mode';
 
diff --git a/src/core/dom/event-helper-listen.js b/src/core/dom/event-helper-listen.js
index 59f29815fd8e..69579113ade3 100644
--- a/src/core/dom/event-helper-listen.js
+++ b/src/core/dom/event-helper-listen.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Whether addEventListener supports options or only takes capture as a boolean
  * @type {boolean|undefined}
diff --git a/src/core/dom/event.extern.js b/src/core/dom/event.extern.js
index f68d1e30bece..ed742e8c3abd 100644
--- a/src/core/dom/event.extern.js
+++ b/src/core/dom/event.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Externs for properties that might be seen/added to Events.
  * @externs
diff --git a/src/core/dom/fingerprint.js b/src/core/dom/fingerprint.js
index b9609c1da522..e9e209fd68ad 100644
--- a/src/core/dom/fingerprint.js
+++ b/src/core/dom/fingerprint.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isElement} from '#core/types';
 import {stringHash32} from '#core/types/string';
 
diff --git a/src/core/dom/form.js b/src/core/dom/form.js
index 59fd1ba3d2f9..efe023268a24 100644
--- a/src/core/dom/form.js
+++ b/src/core/dom/form.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {iterateCursor} from '#core/dom';
 import {ancestorElementsByTag} from '#core/dom/query';
 import {toArray} from '#core/types/array';
diff --git a/src/core/dom/fullscreen.extern.js b/src/core/dom/fullscreen.extern.js
index f97012d380f3..2989c51e32ef 100644
--- a/src/core/dom/fullscreen.extern.js
+++ b/src/core/dom/fullscreen.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Externs for possible fullscreen properties browsers may attach
  * to Elements.
diff --git a/src/core/dom/fullscreen.js b/src/core/dom/fullscreen.js
index b75f9d6f8975..651a13c31df8 100644
--- a/src/core/dom/fullscreen.js
+++ b/src/core/dom/fullscreen.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Replacement for `Element.requestFullscreen()` method.
  * https://developer.mozilla.org/en-US/docs/Web/API/Element/requestFullscreen
diff --git a/src/core/dom/get-html.js b/src/core/dom/get-html.js
index e182d029292e..9e5219451efe 100644
--- a/src/core/dom/get-html.js
+++ b/src/core/dom/get-html.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isElement, isString} from '#core/types';
 
 /** @type {!Array<string>} */
diff --git a/src/core/dom/img.js b/src/core/dom/img.js
index 67020bb036e4..04a6fe25a546 100644
--- a/src/core/dom/img.js
+++ b/src/core/dom/img.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Sets the img src to the first url in the srcset if srcset is defined but
  * src is not for browsers that do not support srcset.
diff --git a/src/core/dom/index.js b/src/core/dom/index.js
index 922011bc3ce9..c5aeb113fbbb 100644
--- a/src/core/dom/index.js
+++ b/src/core/dom/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as mode from '#core/mode';
 import {dict} from '#core/types/object';
 import {parseJson} from '#core/types/object/json';
diff --git a/src/core/dom/layout/index.js b/src/core/dom/layout/index.js
index 12f4a76236c2..6d2b3ef42a3b 100644
--- a/src/core/dom/layout/index.js
+++ b/src/core/dom/layout/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Implements element layout. See https://goo.gl/9avXuT for
  * details.
diff --git a/src/core/dom/layout/intersection-no-root.js b/src/core/dom/layout/intersection-no-root.js
index 70daae60c389..84216c240b0e 100644
--- a/src/core/dom/layout/intersection-no-root.js
+++ b/src/core/dom/layout/intersection-no-root.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Deferred} from '#core/data-structures/promise';
 import {createViewportObserver} from '#core/dom/layout/viewport-observer';
 import {toWin} from '#core/window';
diff --git a/src/core/dom/layout/intersection.js b/src/core/dom/layout/intersection.js
index 24b748cce6e0..47b4cc901dc7 100644
--- a/src/core/dom/layout/intersection.js
+++ b/src/core/dom/layout/intersection.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Deferred} from '#core/data-structures/promise';
 import {dict} from '#core/types/object';
 import {toWin} from '#core/window';
diff --git a/src/core/dom/layout/page-layout-box.js b/src/core/dom/layout/page-layout-box.js
index 7cc6d2b99fe3..e5a48e5f51e7 100644
--- a/src/core/dom/layout/page-layout-box.js
+++ b/src/core/dom/layout/page-layout-box.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {LayoutRectDef, layoutRectLtwh} from './rect';
 
 /**
diff --git a/src/core/dom/layout/rect.js b/src/core/dom/layout/rect.js
index ebc1fe4636ff..edac21b6dad7 100644
--- a/src/core/dom/layout/rect.js
+++ b/src/core/dom/layout/rect.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * TODO(rcebulko): Migrate the actual ViewportInterface into core or an extern.
  * @typedef {{
diff --git a/src/core/dom/layout/size-observer.js b/src/core/dom/layout/size-observer.js
index 33808e42900e..7b7ca03c76c6 100644
--- a/src/core/dom/layout/size-observer.js
+++ b/src/core/dom/layout/size-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {computedStyle} from '#core/dom/style';
 import {tryCallback} from '#core/error';
 import {remove} from '#core/types/array';
diff --git a/src/core/dom/layout/viewport-observer.js b/src/core/dom/layout/viewport-observer.js
index 18b0e20abc6c..f01216c7a8ca 100644
--- a/src/core/dom/layout/viewport-observer.js
+++ b/src/core/dom/layout/viewport-observer.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {devAssert} from '#core/assert';
 import {isIframed} from '#core/dom';
 import * as mode from '#core/mode';
diff --git a/src/core/dom/media-query-props.extern.js b/src/core/dom/media-query-props.extern.js
index c0dacc18c425..e2afcdbb114f 100644
--- a/src/core/dom/media-query-props.extern.js
+++ b/src/core/dom/media-query-props.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Externs for properties expected to be on MediaQueryList in some
  * browsers.
diff --git a/src/core/dom/media-query-props.js b/src/core/dom/media-query-props.js
index b2b2a17ba2ff..49c46488d06e 100644
--- a/src/core/dom/media-query-props.js
+++ b/src/core/dom/media-query-props.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @typedef {!Array<{query: ?MediaQueryList, value: string}>} */
 let ExprDef;
 
diff --git a/src/core/dom/modal.js b/src/core/dom/modal.js
index 3229e670b884..ce2ad07bc957 100644
--- a/src/core/dom/modal.js
+++ b/src/core/dom/modal.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert} from '#core/assert';
 import {isConnectedNode, rootNodeFor} from '#core/dom';
 import {isElement} from '#core/types';
diff --git a/src/core/dom/parse-date-attributes.js b/src/core/dom/parse-date-attributes.js
index a76db46d2bbc..c96a5051a106 100644
--- a/src/core/dom/parse-date-attributes.js
+++ b/src/core/dom/parse-date-attributes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert, userAssert} from '#core/assert';
 import {TimestampDef, parseDate} from '#core/types/date';
 
diff --git a/src/core/dom/propagate-attributes.js b/src/core/dom/propagate-attributes.js
index a115c2c27421..66a7945bfc4d 100644
--- a/src/core/dom/propagate-attributes.js
+++ b/src/core/dom/propagate-attributes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {arrayOrSingleItemToArray} from '#core/types/array';
 
 /**
diff --git a/src/core/dom/query.js b/src/core/dom/query.js
index a96ff38cddd9..bd222ddf1348 100644
--- a/src/core/dom/query.js
+++ b/src/core/dom/query.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert, devAssertElement} from '#core/assert';
 import * as mode from '#core/mode';
 
diff --git a/src/core/dom/resource-container-helper.js b/src/core/dom/resource-container-helper.js
index 49997cf102c1..b1cab04c353f 100644
--- a/src/core/dom/resource-container-helper.js
+++ b/src/core/dom/resource-container-helper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {tryCallback} from '#core/error';
 import {arrayOrSingleItemToArray} from '#core/types/array';
 
diff --git a/src/core/dom/srcset.js b/src/core/dom/srcset.js
index 2954ef28d73d..4ef7812e6e10 100644
--- a/src/core/dom/srcset.js
+++ b/src/core/dom/srcset.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert, userAssert} from '#core/assert';
 
 /**
diff --git a/src/core/dom/static-template.js b/src/core/dom/static-template.js
index a3783a91429e..487079f99369 100644
--- a/src/core/dom/static-template.js
+++ b/src/core/dom/static-template.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert} from '#core/assert';
 import {map} from '#core/types/object';
 
diff --git a/src/core/dom/stream/detached.js b/src/core/dom/stream/detached.js
index 45a75a664ede..de44840fed00 100644
--- a/src/core/dom/stream/detached.js
+++ b/src/core/dom/stream/detached.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert} from '#core/assert';
 
 export class DetachedDomStream {
diff --git a/src/core/dom/stream/index.js b/src/core/dom/stream/index.js
index 6c83a0b9a2d5..34da044cf6f5 100644
--- a/src/core/dom/stream/index.js
+++ b/src/core/dom/stream/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 export {DetachedDomStream} from './detached';
 export {streamResponseToWriter} from './response';
 // TODO(#32693): Migrate DomTransformStream into core to finish the trio
diff --git a/src/core/dom/stream/response.js b/src/core/dom/stream/response.js
index a47ac518d352..c1a275502b0b 100644
--- a/src/core/dom/stream/response.js
+++ b/src/core/dom/stream/response.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 
 /**
diff --git a/src/core/dom/style.js b/src/core/dom/style.js
index 0bf2866eeb64..16f219664ce8 100644
--- a/src/core/dom/style.js
+++ b/src/core/dom/style.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Note: loaded by 3p system. Cannot rely on babel polyfills.
 import {devAssert} from '#core/assert';
 import {devError} from '#core/error';
diff --git a/src/core/dom/transition.js b/src/core/dom/transition.js
index 572334e981f5..35f9774d24f7 100644
--- a/src/core/dom/transition.js
+++ b/src/core/dom/transition.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isString} from '#core/types';
 
 import {
diff --git a/src/core/dom/video/index.js b/src/core/dom/video/index.js
index 0021cf1f40ab..4dbe66c5a4df 100644
--- a/src/core/dom/video/index.js
+++ b/src/core/dom/video/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {devAssertElement} from '#core/assert';
 import {setStyles} from '#core/dom/style';
 
diff --git a/src/core/dom/video/pause-helper.js b/src/core/dom/video/pause-helper.js
index 0bcb12ff76c7..2d84922c6269 100644
--- a/src/core/dom/video/pause-helper.js
+++ b/src/core/dom/video/pause-helper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   observeBorderBoxSize,
   unobserveBorderBoxSize,
diff --git a/src/core/dom/video/video.extern.js b/src/core/dom/video/video.extern.js
index c1f8b1e96b12..85e5e7bacbff 100644
--- a/src/core/dom/video/video.extern.js
+++ b/src/core/dom/video/video.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Expected types and properties for handling video-related
  * components and features
diff --git a/src/core/dom/web-components.extern.js b/src/core/dom/web-components.extern.js
index fdb331760b80..712f1d643d92 100644
--- a/src/core/dom/web-components.extern.js
+++ b/src/core/dom/web-components.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Externs for values expected to be on elements when Shadow DOM
  * is supported.
diff --git a/src/core/dom/web-components.js b/src/core/dom/web-components.js
index 13f2688f035e..b77a9ead1402 100644
--- a/src/core/dom/web-components.js
+++ b/src/core/dom/web-components.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Possible versions of Shadow DOM spec
  * @enum {string}
diff --git a/src/core/error/error.extern.js b/src/core/error/error.extern.js
index 5bb9d304a9b0..ca56c9749179 100644
--- a/src/core/error/error.extern.js
+++ b/src/core/error/error.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Externs for extra properties expected on errors.
  * @externs
diff --git a/src/core/error/index.js b/src/core/error/index.js
index 548266b969ae..40bfae5970e8 100644
--- a/src/core/error/index.js
+++ b/src/core/error/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Some exceptions (DOMException, namely) have read-only message.
  * @param {!Error} error
diff --git a/src/core/error/message-helpers.js b/src/core/error/message-helpers.js
index dc5d46dca77b..7139239b0dd9 100644
--- a/src/core/error/message-helpers.js
+++ b/src/core/error/message-helpers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isElement} from '#core/types';
 
 /**
diff --git a/src/core/math.js b/src/core/math.js
index 046de6b56372..88a5aca3179b 100644
--- a/src/core/math.js
+++ b/src/core/math.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert} from '#core/assert';
 
 /**
diff --git a/src/core/mode/index.js b/src/core/mode/index.js
index 699760e2fd49..5b893df377fe 100644
--- a/src/core/mode/index.js
+++ b/src/core/mode/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 export {isProd} from './prod';
 export {isLocalDev} from './local-dev';
 export {isMinified} from './minified';
diff --git a/src/core/mode/local-dev.js b/src/core/mode/local-dev.js
index e3f188f36f1b..14f166f69220 100644
--- a/src/core/mode/local-dev.js
+++ b/src/core/mode/local-dev.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isProd} from './prod';
 import {isTest} from './test';
 
diff --git a/src/core/mode/minified.js b/src/core/mode/minified.js
index eda24dc8b011..6d1fe318a877 100644
--- a/src/core/mode/minified.js
+++ b/src/core/mode/minified.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Returns true whenever closure compiler is used.
  * This is a magic constant that is replaced by babel.
diff --git a/src/core/mode/prod.js b/src/core/mode/prod.js
index 04e347706824..10e7d8001f35 100644
--- a/src/core/mode/prod.js
+++ b/src/core/mode/prod.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Returns true when the build is meant for distribution.
  * This means `amp dist` was called _without_ the --fortesting flag.
diff --git a/src/core/mode/test.js b/src/core/mode/test.js
index ff0acc02f19b..883268532637 100644
--- a/src/core/mode/test.js
+++ b/src/core/mode/test.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isProd} from './prod';
 
 /**
diff --git a/src/core/mode/version.js b/src/core/mode/version.js
index c73bc12bf5be..6d437efa859d 100644
--- a/src/core/mode/version.js
+++ b/src/core/mode/version.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Returns the internal AMP runtime version. Note that this is not the RTV,
  * which is a prefix and the runtime version.
diff --git a/src/core/types/array.js b/src/core/types/array.js
index faba24f7978b..1a66325d027d 100644
--- a/src/core/types/array.js
+++ b/src/core/types/array.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Converts an array-like object to an array.
  * @param {?IArrayLike<T>|string} arrayLike
diff --git a/src/core/types/date.js b/src/core/types/date.js
index da41bfc958ae..2997ed0238b8 100644
--- a/src/core/types/date.js
+++ b/src/core/types/date.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isString} from './string';
 
 /** @fileoverview helpers for dealing with dates and times. */
diff --git a/src/core/types/enum.js b/src/core/types/enum.js
index a01ad8af9589..6a0d0c1c393a 100644
--- a/src/core/types/enum.js
+++ b/src/core/types/enum.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Checks whether `val` is a valid value of `enumObj`.
  *
diff --git a/src/core/types/function.extern.js b/src/core/types/function.extern.js
index 0a85bb51e330..23929ad6487f 100644
--- a/src/core/types/function.extern.js
+++ b/src/core/types/function.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Global type definitions related to functions.
  * @externs
diff --git a/src/core/types/function/exponential-backoff.js b/src/core/types/function/exponential-backoff.js
index acac8283544e..b8637c6ee894 100644
--- a/src/core/types/function/exponential-backoff.js
+++ b/src/core/types/function/exponential-backoff.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @param {number=} opt_base Exponential base. Defaults to 2.
  * @return {function(function()): number} Function that when invoked will
diff --git a/src/core/types/function/index.js b/src/core/types/function/index.js
index a8f4b46c6f0f..884c32ff76fd 100644
--- a/src/core/types/function/index.js
+++ b/src/core/types/function/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @fileoverview Helpers to wrap functions. */
 
 /**
diff --git a/src/core/types/index.js b/src/core/types/index.js
index 7062d28c67da..6c0285f8694e 100644
--- a/src/core/types/index.js
+++ b/src/core/types/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Export all type-checking helpers for convenience
 export {isArray} from './array';
 export {isEnumValue} from './enum';
diff --git a/src/core/types/object/index.js b/src/core/types/object/index.js
index fd8177272ef9..841176a1945f 100644
--- a/src/core/types/object/index.js
+++ b/src/core/types/object/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /* @const */
 const {hasOwnProperty: hasOwn_, toString: toString_} = Object.prototype;
 
diff --git a/src/core/types/object/json.extern.js b/src/core/types/object/json.extern.js
index a66e76385630..9c6984737c50 100644
--- a/src/core/types/object/json.extern.js
+++ b/src/core/types/object/json.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Externs for JSON types and helpers
  * @externs
diff --git a/src/core/types/object/json.js b/src/core/types/object/json.js
index 2e27eb3db1e2..d43f6f4abbbe 100644
--- a/src/core/types/object/json.js
+++ b/src/core/types/object/json.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isArray} from '#core/types/array';
 
 /**
diff --git a/src/core/types/string/base64.js b/src/core/types/string/base64.js
index 42d3d08c036e..ffadf014bf32 100644
--- a/src/core/types/string/base64.js
+++ b/src/core/types/string/base64.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {bytesToString, stringToBytes, utf8Decode, utf8Encode} from './bytes';
 
 /**
diff --git a/src/core/types/string/bytes.js b/src/core/types/string/bytes.js
index 752119a69853..8330b01de9b1 100644
--- a/src/core/types/string/bytes.js
+++ b/src/core/types/string/bytes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert} from '#core/assert';
 import * as mode from '#core/mode';
 
diff --git a/src/core/types/string/index.js b/src/core/types/string/index.js
index 5ba222884d35..c207a47c5d8b 100644
--- a/src/core/types/string/index.js
+++ b/src/core/types/string/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @param {string} _match
  * @param {string} character
diff --git a/src/core/types/string/url.js b/src/core/types/string/url.js
index 0718b856bf3b..422df9bfa62c 100644
--- a/src/core/types/string/url.js
+++ b/src/core/types/string/url.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {map} from '#core/types/object';
 
 const QUERY_STRING_REGEX = /(?:^[#?]?|&)([^=&]+)(?:=([^&]*))?/g;
diff --git a/src/core/window/clipboard.js b/src/core/window/clipboard.js
index 9869c44fe7bc..8b59e9382652 100644
--- a/src/core/window/clipboard.js
+++ b/src/core/window/clipboard.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {removeElement} from '#core/dom';
 import {setStyles} from '#core/dom/style';
 
diff --git a/src/core/window/history.js b/src/core/window/history.js
index 6c2474cd4d1d..e8e6d8939e07 100644
--- a/src/core/window/history.js
+++ b/src/core/window/history.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Gets state from History.
  * But IE11 throws if there is no state.
diff --git a/src/core/window/index.js b/src/core/window/index.js
index a8644d9d2047..0f40c0814a7b 100644
--- a/src/core/window/index.js
+++ b/src/core/window/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Externs declare that access `defaultView` from `document` or
  * `ownerDocument` is of type `(Window|null)` but most of our parameter types
diff --git a/src/core/window/interface.js b/src/core/window/interface.js
index 5f5cf79d1814..fe87f814ebe2 100644
--- a/src/core/window/interface.js
+++ b/src/core/window/interface.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * An interface to interact with browser window object.
  * Mainly used to mock out read only APIs in test.
diff --git a/src/core/window/window.extern.js b/src/core/window/window.extern.js
index bfd5fbdf6bd6..59d4157074e8 100644
--- a/src/core/window/window.extern.js
+++ b/src/core/window/window.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Externs for values expected to be on global self/window.
  * @externs
diff --git a/src/custom-element.js b/src/custom-element.js
index 4c503aa5544a..42dbd0a8d4f3 100644
--- a/src/custom-element.js
+++ b/src/custom-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 import {CommonSignals} from '#core/constants/common-signals';
 import {ReadyState} from '#core/constants/ready-state';
diff --git a/src/document-fetcher.js b/src/document-fetcher.js
index eea39647f4de..eec25024cbc7 100644
--- a/src/document-fetcher.js
+++ b/src/document-fetcher.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {dict} from '#core/types/object';
 
 import {Services} from '#service';
diff --git a/src/document-submit.js b/src/document-submit.js
index 4aafd97bfc23..88d9902f6578 100644
--- a/src/document-submit.js
+++ b/src/document-submit.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 
 import {Services} from '#service';
diff --git a/src/element-service.js b/src/element-service.js
index 24e5822bda82..ab2859337efe 100644
--- a/src/element-service.js
+++ b/src/element-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as dom from '#core/dom';
 
 import {extensionScriptInNode} from '#service/extension-script';
diff --git a/src/element-stub.js b/src/element-stub.js
index bc5c4d0be270..f7183d55aef7 100644
--- a/src/element-stub.js
+++ b/src/element-stub.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BaseElement} from './base-element';
 
 // TODO(#31915): completely eliminate this class.
diff --git a/src/error-reporting.js b/src/error-reporting.js
index 22f583e5dd2a..10377189e23b 100644
--- a/src/error-reporting.js
+++ b/src/error-reporting.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 import {duplicateErrorIfNecessary} from '#core/error';
 import {
diff --git a/src/event-helper.js b/src/event-helper.js
index 6e1cf930a725..992ee54f1a41 100644
--- a/src/event-helper.js
+++ b/src/event-helper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {internalListenImplementation} from '#core/dom/event-helper-listen';
 import {lastChildElement} from '#core/dom/query';
 import * as mode from '#core/mode';
diff --git a/src/experiments/ads-initial-intersection-exp.js b/src/experiments/ads-initial-intersection-exp.js
index 7af3d0d9afc5..700f3a49252a 100644
--- a/src/experiments/ads-initial-intersection-exp.js
+++ b/src/experiments/ads-initial-intersection-exp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @const */
 export const ADS_INITIAL_INTERSECTION_EXP = {
   id: 'ads-initialIntersection',
diff --git a/src/experiments/experiments.extern.js b/src/experiments/experiments.extern.js
index 0089af1e1728..a6168cc9292b 100644
--- a/src/experiments/experiments.extern.js
+++ b/src/experiments/experiments.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview global externs for the experiment system.
  * @externs
diff --git a/src/experiments/experiments.type.js b/src/experiments/experiments.type.js
index 18e29f86461b..cbadb8c9a198 100644
--- a/src/experiments/experiments.type.js
+++ b/src/experiments/experiments.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @typedef {{
  *   experimentId: string,
diff --git a/src/experiments/index.js b/src/experiments/index.js
index 5caa318764d8..19daba101a28 100644
--- a/src/experiments/index.js
+++ b/src/experiments/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Experiments system allows a developer to opt-in to test
  * features that are not yet fully tested.
diff --git a/src/experiments/shame.extern.js b/src/experiments/shame.extern.js
index 0a907d373bc1..7e82ec21e6dd 100644
--- a/src/experiments/shame.extern.js
+++ b/src/experiments/shame.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview The junk-drawer of externs that haven't yet been sorted well.
  * Shame! Shame! Shame! Avoid adding to this.
diff --git a/src/experiments/story-ad-auto-advance.js b/src/experiments/story-ad-auto-advance.js
index d4092f05df74..35c942889eef 100644
--- a/src/experiments/story-ad-auto-advance.js
+++ b/src/experiments/story-ad-auto-advance.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {randomlySelectUnsetExperiments} from '#experiments';
 
 import {ExperimentInfoDef} from './experiments.type';
diff --git a/src/experiments/story-ad-placements.js b/src/experiments/story-ad-placements.js
index cc9f9a999ef8..7f31c192c842 100644
--- a/src/experiments/story-ad-placements.js
+++ b/src/experiments/story-ad-placements.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {randomlySelectUnsetExperiments} from '#experiments';
 
 import {ExperimentInfoDef} from './experiments.type';
diff --git a/src/experiments/story-ad-progress-segment.js b/src/experiments/story-ad-progress-segment.js
index 4305f5cbc498..1d430b037416 100644
--- a/src/experiments/story-ad-progress-segment.js
+++ b/src/experiments/story-ad-progress-segment.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @const */
 export const StoryAdSegmentExp = {
   ID: 'story-ad-progress-segment',
diff --git a/src/extension-analytics.js b/src/extension-analytics.js
index b8fce2fc6dd6..f931e0e5da95 100644
--- a/src/extension-analytics.js
+++ b/src/extension-analytics.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CommonSignals} from '#core/constants/common-signals';
 import {createElementWithAttributes, removeElement} from '#core/dom';
 import {isArray} from '#core/types';
diff --git a/src/focus-history.js b/src/focus-history.js
index 35126d76f6b8..65b3d2dc32e9 100644
--- a/src/focus-history.js
+++ b/src/focus-history.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Observable} from '#core/data-structures/observable';
 import {isElement} from '#core/types';
 
diff --git a/src/font-stylesheet-timeout.js b/src/font-stylesheet-timeout.js
index 24a0caaefe29..4e75b0464ba6 100644
--- a/src/font-stylesheet-timeout.js
+++ b/src/font-stylesheet-timeout.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {onDocumentReady} from '#core/document-ready';
 import {escapeCssSelectorIdent} from '#core/dom/css-selectors';
 
diff --git a/src/form-data-wrapper.js b/src/form-data-wrapper.js
index 2af8b8044313..6bed6a0ac2b6 100644
--- a/src/form-data-wrapper.js
+++ b/src/form-data-wrapper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {iterateCursor} from '#core/dom';
 import {getFormAsObject, getSubmitButtonUsed} from '#core/dom/form';
 import {map} from '#core/types/object';
diff --git a/src/format.js b/src/format.js
index 0246074f5ea9..5d5d09d8a97c 100644
--- a/src/format.js
+++ b/src/format.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Checks that the document is of an AMP format type.
  * @param {!Array<string>} formats
diff --git a/src/friendly-iframe-embed.js b/src/friendly-iframe-embed.js
index 533d7d0f9282..d276b638fefb 100644
--- a/src/friendly-iframe-embed.js
+++ b/src/friendly-iframe-embed.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CommonSignals} from '#core/constants/common-signals';
 import {VisibilityState} from '#core/constants/visibility-state';
 import {Deferred} from '#core/data-structures/promise';
diff --git a/src/gesture-recognizers.js b/src/gesture-recognizers.js
index f24a84d9afd0..bc319886dca7 100644
--- a/src/gesture-recognizers.js
+++ b/src/gesture-recognizers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {GestureRecognizer} from './gesture';
 import {calcVelocity} from './motion';
 
diff --git a/src/gesture.js b/src/gesture.js
index abac77ea7b95..ff90b8aad7a4 100644
--- a/src/gesture.js
+++ b/src/gesture.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Observable} from '#core/data-structures/observable';
 import {supportsPassiveEventListener} from '#core/dom/event-helper-listen';
 import {findIndex} from '#core/types/array';
diff --git a/src/iframe-attributes.js b/src/iframe-attributes.js
index e6c4fa9c20a4..9c5666fecc3c 100644
--- a/src/iframe-attributes.js
+++ b/src/iframe-attributes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {DomFingerprint} from '#core/dom/fingerprint';
 import {getLengthNumeral} from '#core/dom/layout';
 import {getPageLayoutBoxBlocking} from '#core/dom/layout/page-layout-box';
diff --git a/src/iframe-helper.js b/src/iframe-helper.js
index 6b102cc60f00..66bc8ff4c178 100644
--- a/src/iframe-helper.js
+++ b/src/iframe-helper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {deserializeMessage, isAmpMessage} from '#core/3p-frame-messaging';
 import {addAttributesToElement} from '#core/dom';
 import {closestAncestorElementBySelector} from '#core/dom/query';
diff --git a/src/iframe-video.js b/src/iframe-video.js
index 29413f76d6ce..586f42cb66f3 100644
--- a/src/iframe-video.js
+++ b/src/iframe-video.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {dispatchCustomEvent} from '#core/dom';
 import {applyFillContent} from '#core/dom/layout';
 import {propagateAttributes} from '#core/dom/propagate-attributes';
diff --git a/src/impression.js b/src/impression.js
index 507a95f57147..ca2cd39a3f82 100644
--- a/src/impression.js
+++ b/src/impression.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {parseQueryString} from '#core/types/string/url';
 import {WindowInterface} from '#core/window/interface';
diff --git a/src/inabox/amp-inabox.js b/src/inabox/amp-inabox.js
index 2bfd2587e3ff..09c98fd64635 100644
--- a/src/inabox/amp-inabox.js
+++ b/src/inabox/amp-inabox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * The entry point for AMP inabox runtime (inabox-v0.js).
  */
diff --git a/src/inabox/host-services.js b/src/inabox/host-services.js
index fdaa646d6948..980ee5219430 100644
--- a/src/inabox/host-services.js
+++ b/src/inabox/host-services.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {
diff --git a/src/inabox/inabox-cid.js b/src/inabox/inabox-cid.js
index c667f3563a8e..6140f42418ce 100644
--- a/src/inabox/inabox-cid.js
+++ b/src/inabox/inabox-cid.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CidDef} from '#service/cid-impl';
 
 import {registerServiceBuilderForDoc} from '../service-helpers';
diff --git a/src/inabox/inabox-iframe-messaging-client.js b/src/inabox/inabox-iframe-messaging-client.js
index 8990cda34579..75c96f9c894d 100644
--- a/src/inabox/inabox-iframe-messaging-client.js
+++ b/src/inabox/inabox-iframe-messaging-client.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {IframeMessagingClient} from '#3p/iframe-messaging-client';
 
 import {tryParseJson} from '#core/types/object/json';
diff --git a/src/inabox/inabox-mutator.js b/src/inabox/inabox-mutator.js
index aeedc9d5dcbb..67fbc08f7873 100644
--- a/src/inabox/inabox-mutator.js
+++ b/src/inabox/inabox-mutator.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {registerServiceBuilderForDoc} from '../service-helpers';
diff --git a/src/inabox/inabox-resources.js b/src/inabox/inabox-resources.js
index cf25a91d047d..cee1b361af3a 100644
--- a/src/inabox/inabox-resources.js
+++ b/src/inabox/inabox-resources.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {VisibilityState} from '#core/constants/visibility-state';
 import {Observable} from '#core/data-structures/observable';
 import {Deferred} from '#core/data-structures/promise';
diff --git a/src/inabox/inabox-services.js b/src/inabox/inabox-services.js
index 177d7e38eb49..aa6a87dd775e 100644
--- a/src/inabox/inabox-services.js
+++ b/src/inabox/inabox-services.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {installActionServiceForDoc} from '#service/action-impl';
 import {installDocumentInfoServiceForDoc} from '#service/document-info-impl';
 import {installHiddenObserverForDoc} from '#service/hidden-observer-impl';
diff --git a/src/inabox/inabox-story-ad.js b/src/inabox/inabox-story-ad.js
index 8a3096bd84a1..f1cad7f7ce58 100644
--- a/src/inabox/inabox-story-ad.js
+++ b/src/inabox/inabox-story-ad.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CSS as inaboxCSS} from '../../build/amp-story-auto-ads-inabox-0.1.css';
 import {CSS as sharedCSS} from '../../build/amp-story-auto-ads-shared-0.1.css';
 import {ButtonTextFitter} from '../../extensions/amp-story-auto-ads/0.1/story-ad-button-text-fitter';
diff --git a/src/inabox/inabox-viewer.js b/src/inabox/inabox-viewer.js
index b93747e58926..180cd60553af 100644
--- a/src/inabox/inabox-viewer.js
+++ b/src/inabox/inabox-viewer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ViewerInterface} from '#service/viewer-interface';
 
 import {registerServiceBuilderForDoc} from '../service-helpers';
diff --git a/src/inabox/inabox-viewport.js b/src/inabox/inabox-viewport.js
index 18ee7f73d51a..4f9c7cb83718 100644
--- a/src/inabox/inabox-viewport.js
+++ b/src/inabox/inabox-viewport.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getFrameOverlayManager} from '#ads/inabox/frame-overlay-manager';
 import {getPositionObserver} from '#ads/inabox/position-observer';
 
diff --git a/src/inabox/utils.js b/src/inabox/utils.js
index 3d9ba2159003..25d25794d9fb 100644
--- a/src/inabox/utils.js
+++ b/src/inabox/utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {createCustomEvent} from '../event-helper';
diff --git a/src/ini-load.js b/src/ini-load.js
index 0953bebda43d..f21eb1a26c76 100644
--- a/src/ini-load.js
+++ b/src/ini-load.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isIframed} from '#core/dom';
 
 import {Services} from '#service';
diff --git a/src/input.js b/src/input.js
index c3a4e5f73e80..922e2e7c2e07 100644
--- a/src/input.js
+++ b/src/input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Observable} from '#core/data-structures/observable';
 
 import {Services} from '#service';
diff --git a/src/log.js b/src/log.js
index 7090f4a9e6d1..3ea8619a71ef 100644
--- a/src/log.js
+++ b/src/log.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as assertions from '#core/assert/base';
 import {
   createError,
diff --git a/src/mediasession-helper.js b/src/mediasession-helper.js
index a4b2406c8f5f..f2ac08a43c1d 100644
--- a/src/mediasession-helper.js
+++ b/src/mediasession-helper.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {isArray, isObject} from '#core/types';
 import {tryParseJson} from '#core/types/object/json';
 
diff --git a/src/mode-object.js b/src/mode-object.js
index f6d2b283f4f5..f4fd4078d7a2 100644
--- a/src/mode-object.js
+++ b/src/mode-object.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getMode} from './mode';
 
 /**
diff --git a/src/mode.js b/src/mode.js
index 6246c1f5c6ec..b07f5bc68fdf 100644
--- a/src/mode.js
+++ b/src/mode.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as coreMode from '#core/mode';
 import {getHashParams} from '#core/types/string/url';
 
diff --git a/src/module.js b/src/module.js
index 5ed44e932110..ee8ddcd033b9 100644
--- a/src/module.js
+++ b/src/module.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dev} from './log';
 
 const TAG = 'AMP.require';
diff --git a/src/motion.js b/src/motion.js
index 607578c15984..e05f73a64012 100644
--- a/src/motion.js
+++ b/src/motion.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 
 import {Services} from '#service';
diff --git a/src/multidoc-manager.js b/src/multidoc-manager.js
index 4458748181d9..aa33ce9445a8 100644
--- a/src/multidoc-manager.js
+++ b/src/multidoc-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CommonSignals} from '#core/constants/common-signals';
 import {VisibilityState} from '#core/constants/visibility-state';
 import {isConnectedNode} from '#core/dom';
diff --git a/src/open-window-dialog.js b/src/open-window-dialog.js
index 20f4e6895dab..f5aebaf5ea47 100644
--- a/src/open-window-dialog.js
+++ b/src/open-window-dialog.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {includes} from '#core/types/string';
 
 import {dev} from './log';
diff --git a/src/pass.js b/src/pass.js
index bd3c49b5e3ee..3fa946bddaf8 100644
--- a/src/pass.js
+++ b/src/pass.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 /**
diff --git a/src/pixel.js b/src/pixel.js
index 1fc7fe857507..0eff9f6dc1c5 100644
--- a/src/pixel.js
+++ b/src/pixel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes} from '#core/dom';
 import {dict} from '#core/types/object';
 import {WindowInterface} from '#core/window/interface';
diff --git a/src/polyfills/abort-controller.js b/src/polyfills/abort-controller.js
index 4f0e6f54278f..3db7349c0ef7 100644
--- a/src/polyfills/abort-controller.js
+++ b/src/polyfills/abort-controller.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** Polyfill for the public AbortController. */
 class AbortController {
   /** Constructor. */
diff --git a/src/polyfills/array-includes.js b/src/polyfills/array-includes.js
index 2672874571fe..f660d03ddbc8 100644
--- a/src/polyfills/array-includes.js
+++ b/src/polyfills/array-includes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Returns true if the element is in the array and false otherwise.
  *
diff --git a/src/polyfills/custom-elements.extern.js b/src/polyfills/custom-elements.extern.js
index d05302e616fb..57b8d8d6fd8c 100644
--- a/src/polyfills/custom-elements.extern.js
+++ b/src/polyfills/custom-elements.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // This is needed only by custom elements, so it doesn't need to be in the core
 // window externs file.
 /** @type {!typeof HTMLElement} */
diff --git a/src/polyfills/custom-elements.js b/src/polyfills/custom-elements.js
index 95aee6ba739c..8b8d68a4f893 100644
--- a/src/polyfills/custom-elements.js
+++ b/src/polyfills/custom-elements.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {rethrowAsync} from '#core/error';
 import * as mode from '#core/mode';
diff --git a/src/polyfills/document-contains.js b/src/polyfills/document-contains.js
index 5d5d2781b41c..def4fa999dc3 100644
--- a/src/polyfills/document-contains.js
+++ b/src/polyfills/document-contains.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Polyfill for `document.contains()` method. Notice that according to spec
  * `document.contains` is inclusionary.
diff --git a/src/polyfills/domtokenlist.js b/src/polyfills/domtokenlist.js
index c19838433484..fa555d0e0480 100644
--- a/src/polyfills/domtokenlist.js
+++ b/src/polyfills/domtokenlist.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Polyfill for `DOMTokenList.prototype.toggle(token, opt_force)` method. This
  * is specially important because IE does not support `opt_force` attribute. See
diff --git a/src/polyfills/fetch.js b/src/polyfills/fetch.js
index db255ddce5ab..1e9a904c556d 100644
--- a/src/polyfills/fetch.js
+++ b/src/polyfills/fetch.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {devAssert} from '#core/assert';
 import {isArray, isObject} from '#core/types';
 import {hasOwn, map} from '#core/types/object';
diff --git a/src/polyfills/get-bounding-client-rect.js b/src/polyfills/get-bounding-client-rect.js
index 0b96432b6d80..b3f270f86111 100644
--- a/src/polyfills/get-bounding-client-rect.js
+++ b/src/polyfills/get-bounding-client-rect.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview
  * IE 10 throws "Unspecified error" when calling getBoundingClientRect() on a
diff --git a/src/polyfills/index.js b/src/polyfills/index.js
index eff985a28155..d70f22c5ef92 100644
--- a/src/polyfills/index.js
+++ b/src/polyfills/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @fileoverview Installs polyfills depending on build environment. */
 
 import * as mode from '#core/mode';
diff --git a/src/polyfills/intersection-observer.js b/src/polyfills/intersection-observer.js
index 6268ac8b0c8e..a4820118d8f0 100644
--- a/src/polyfills/intersection-observer.js
+++ b/src/polyfills/intersection-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview
  * See https://developer.mozilla.org/en-US/docs/Web/API/IntersectionObserver.
diff --git a/src/polyfills/map-set.js b/src/polyfills/map-set.js
index 5924fc9274b8..39c698707cbc 100644
--- a/src/polyfills/map-set.js
+++ b/src/polyfills/map-set.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Forces the return value from Map.prototype.set to always be the map
  * instance. IE11 returns undefined.
diff --git a/src/polyfills/math-sign.js b/src/polyfills/math-sign.js
index 7c544a1f3612..28c519a35241 100644
--- a/src/polyfills/math-sign.js
+++ b/src/polyfills/math-sign.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Parses the number x and returns its sign. For positive x returns 1, for
  * negative, -1. For 0 and -0, returns 0 and -0 respectively. For any number
diff --git a/src/polyfills/object-assign.js b/src/polyfills/object-assign.js
index 684fedefb349..44c9ea33277f 100644
--- a/src/polyfills/object-assign.js
+++ b/src/polyfills/object-assign.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const {hasOwnProperty} = Object.prototype;
 
 /**
diff --git a/src/polyfills/object-values.js b/src/polyfills/object-values.js
index 1b02459a1c55..6042c4038ff8 100644
--- a/src/polyfills/object-values.js
+++ b/src/polyfills/object-values.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Implements `Object.values` API.
  * See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_objects/Object/values.
diff --git a/src/polyfills/promise.extern.js b/src/polyfills/promise.extern.js
index 82d7de4b6a17..f0390d9077e4 100644
--- a/src/polyfills/promise.extern.js
+++ b/src/polyfills/promise.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Provide extern for promise-pjs polyfill.
  * @externs
diff --git a/src/polyfills/promise.js b/src/polyfills/promise.js
index 37ed4f1ab6a1..ac4eea37efd0 100644
--- a/src/polyfills/promise.js
+++ b/src/polyfills/promise.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import Promise from 'promise-pjs';
 
 /**
diff --git a/src/polyfills/resize-observer.js b/src/polyfills/resize-observer.js
index 795b68b9b534..eff39a8b2fcc 100644
--- a/src/polyfills/resize-observer.js
+++ b/src/polyfills/resize-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview
  * See https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver
diff --git a/src/polyfills/set.js b/src/polyfills/set.js
index abc7a6434be9..0f170d352cb7 100644
--- a/src/polyfills/set.js
+++ b/src/polyfills/set.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {toArray} from '#core/types/array';
 
 /**
diff --git a/src/polyfills/shame.extern.js b/src/polyfills/shame.extern.js
index 63c08376c188..5c7b32a365fe 100644
--- a/src/polyfills/shame.extern.js
+++ b/src/polyfills/shame.extern.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview The junk-drawer of externs that haven't yet been sorted well.
  * Shame! Shame! Shame! Avoid adding to this.
diff --git a/src/polyfills/string-starts-with.js b/src/polyfills/string-starts-with.js
index 5f071417f7e2..11858d96af07 100644
--- a/src/polyfills/string-starts-with.js
+++ b/src/polyfills/string-starts-with.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Return true if string begins with the characters of the specified string.
  * Polyfill copied from MDN: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/string/startsWith
diff --git a/src/polyfills/stubs/intersection-observer-stub.js b/src/polyfills/stubs/intersection-observer-stub.js
index b8d1bd7e83b4..dc79a3ae5f38 100644
--- a/src/polyfills/stubs/intersection-observer-stub.js
+++ b/src/polyfills/stubs/intersection-observer-stub.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview
  * See https://developer.mozilla.org/en-US/docs/Web/API/IntersectionObserver.
diff --git a/src/polyfills/stubs/resize-observer-stub.js b/src/polyfills/stubs/resize-observer-stub.js
index 98c8defb10e4..62a5e9ad61d4 100644
--- a/src/polyfills/stubs/resize-observer-stub.js
+++ b/src/polyfills/stubs/resize-observer-stub.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview
  * See https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver
diff --git a/src/polyfills/weakmap-set.js b/src/polyfills/weakmap-set.js
index 6fc5d4b26070..f7bd9d147679 100644
--- a/src/polyfills/weakmap-set.js
+++ b/src/polyfills/weakmap-set.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Forces the return value from WeakMap.prototype.set to always be the map
  * instance. IE11 returns undefined.
diff --git a/src/preact/base-element.js b/src/preact/base-element.js
index 9698643c184a..92464a50ca6a 100644
--- a/src/preact/base-element.js
+++ b/src/preact/base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert} from '#core/assert';
 import {ActionTrust} from '#core/constants/action-constants';
 import {AmpEvents} from '#core/constants/amp-events';
diff --git a/src/preact/compat.js b/src/preact/compat.js
index 3da118400e6f..7a41a80cda7b 100644
--- a/src/preact/compat.js
+++ b/src/preact/compat.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as compat from /*OK*/ 'preact/compat';
 
 /**
diff --git a/src/preact/component/3p-frame.js b/src/preact/component/3p-frame.js
index 1ae0051b4bb9..0804528ce123 100644
--- a/src/preact/component/3p-frame.js
+++ b/src/preact/component/3p-frame.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getOptionalSandboxFlags, getRequiredSandboxFlags} from '#core/3p-frame';
 import {sequentialIdGenerator} from '#core/data-structures/id-generator';
 import {dict} from '#core/types/object';
diff --git a/src/preact/component/component.type.js b/src/preact/component/component.type.js
index df5d67339098..baaa41159f27 100644
--- a/src/preact/component/component.type.js
+++ b/src/preact/component/component.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /**
diff --git a/src/preact/component/contain.js b/src/preact/component/contain.js
index 4858cc68bd67..7f985fa36bf8 100644
--- a/src/preact/component/contain.js
+++ b/src/preact/component/contain.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {forwardRef} from '#preact/compat';
 
diff --git a/src/preact/component/dom-handle.js b/src/preact/component/dom-handle.js
index a9ebbfd5f30f..6c7f111f1daa 100644
--- a/src/preact/component/dom-handle.js
+++ b/src/preact/component/dom-handle.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {useImperativeHandle} from '#preact';
 
 /**
diff --git a/src/preact/component/iframe.js b/src/preact/component/iframe.js
index 127573bd33f1..5ad0e30d1da3 100644
--- a/src/preact/component/iframe.js
+++ b/src/preact/component/iframe.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Loading} from '#core/constants/loading-instructions';
 import {ReadyState} from '#core/constants/ready-state';
 
diff --git a/src/preact/component/index.js b/src/preact/component/index.js
index c749a3b35564..a99a8115cba6 100644
--- a/src/preact/component/index.js
+++ b/src/preact/component/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 export {ContainWrapper} from './contain';
 export {Wrapper} from './wrapper';
 export {useRenderer} from './renderer';
diff --git a/src/preact/component/renderer.js b/src/preact/component/renderer.js
index 74daef38c531..c2d4d3999b6a 100644
--- a/src/preact/component/renderer.js
+++ b/src/preact/component/renderer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {useLayoutEffect, useState} from '#preact';
 
 /**
diff --git a/src/preact/component/value-ref.js b/src/preact/component/value-ref.js
index 6b6f30609997..7500a9b0a8ee 100644
--- a/src/preact/component/value-ref.js
+++ b/src/preact/component/value-ref.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {useRef} from '#preact';
 
 /**
diff --git a/src/preact/component/wrapper.js b/src/preact/component/wrapper.js
index 26e9b2951db8..d4e4ea88d80b 100644
--- a/src/preact/component/wrapper.js
+++ b/src/preact/component/wrapper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as Preact from '#preact';
 import {forwardRef} from '#preact/compat';
 
diff --git a/src/preact/context.js b/src/preact/context.js
index c1151e83aed1..08666117546f 100644
--- a/src/preact/context.js
+++ b/src/preact/context.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   Loading,
   reducer as loadingReducer,
diff --git a/src/preact/context.type.js b/src/preact/context.type.js
index 60502f4ac7e7..f16d8c3abab2 100644
--- a/src/preact/context.type.js
+++ b/src/preact/context.type.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @externs */
 
 /** @const */
diff --git a/src/preact/contextprops.js b/src/preact/contextprops.js
index 62d63ece779a..97ec144b92b8 100644
--- a/src/preact/contextprops.js
+++ b/src/preact/contextprops.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   Loading,
   reducer as loadingReducer,
diff --git a/src/preact/index.js b/src/preact/index.js
index f445a78ce2c5..20ca38f64641 100644
--- a/src/preact/index.js
+++ b/src/preact/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as preact from /*OK*/ 'preact';
 // The preactDOM name is explicit, so we can remap to react-dom.
 import * as preactDOM from /*OK*/ 'preact/dom';
diff --git a/src/preact/parse-props.js b/src/preact/parse-props.js
index 0ae7815661b5..eeb1e8007ff0 100644
--- a/src/preact/parse-props.js
+++ b/src/preact/parse-props.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert} from '#core/assert';
 import {Loading} from '#core/constants/loading-instructions';
 import {sequentialIdGenerator} from '#core/data-structures/id-generator';
diff --git a/src/preact/slot.js b/src/preact/slot.js
index 6f0ab1877f62..3a6b593f6cd2 100644
--- a/src/preact/slot.js
+++ b/src/preact/slot.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert} from '#core/assert';
 import {Loading} from '#core/constants/loading-instructions';
 import {rediscoverChildren, removeProp, setProp} from '#core/context';
diff --git a/src/preact/storybook/Context.js b/src/preact/storybook/Context.js
index 9ec30516d493..d5499dfe8f31 100644
--- a/src/preact/storybook/Context.js
+++ b/src/preact/storybook/Context.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {boolean, select, withKnobs} from '@storybook/addon-knobs';
 
 import * as Preact from '#preact';
diff --git a/src/preact/storybook/Wrappers.js b/src/preact/storybook/Wrappers.js
index 977d070da5a0..445b5cad17b7 100644
--- a/src/preact/storybook/Wrappers.js
+++ b/src/preact/storybook/Wrappers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {boolean, object, text, withKnobs} from '@storybook/addon-knobs';
 
 import * as Preact from '#preact';
diff --git a/src/preact/utils.js b/src/preact/utils.js
index 638b864abd0a..11361500d8ae 100644
--- a/src/preact/utils.js
+++ b/src/preact/utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {useLayoutEffect} from '#preact';
 
 import {useAmpContext} from './context';
diff --git a/src/preconnect.js b/src/preconnect.js
index a7bfc3ec778a..b2e7f7d8b86a 100644
--- a/src/preconnect.js
+++ b/src/preconnect.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Provides a services to preconnect to a url to warm up the
  * connection before the real request can be made.
diff --git a/src/pull-to-refresh.js b/src/pull-to-refresh.js
index ec2124bbfc6e..46445740c34b 100644
--- a/src/pull-to-refresh.js
+++ b/src/pull-to-refresh.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 /**
diff --git a/src/purifier/index.d.ts b/src/purifier/index.d.ts
index b539bb0a0bfc..1d12eeee36b5 100644
--- a/src/purifier/index.d.ts
+++ b/src/purifier/index.d.ts
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /// <reference types="dompurify"/>
 
diff --git a/src/purifier/index.js b/src/purifier/index.js
index b5c71db5ac13..c2c00f608101 100644
--- a/src/purifier/index.js
+++ b/src/purifier/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import purify from 'dompurify';
 
 import {devAssertElement} from '#core/assert';
diff --git a/src/purifier/noop.js b/src/purifier/noop.js
index eca6c8ac933a..caf44dc02cfe 100644
--- a/src/purifier/noop.js
+++ b/src/purifier/noop.js
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 import {isElement} from '#core/types';
 
diff --git a/src/purifier/sanitation.js b/src/purifier/sanitation.js
index 14f73a7ca5ea..d4bafb639ceb 100644
--- a/src/purifier/sanitation.js
+++ b/src/purifier/sanitation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict, map} from '#core/types/object';
 
 import {isAmp4Email} from '../format';
diff --git a/src/render-delaying-services.js b/src/render-delaying-services.js
index 287df1d59837..041c97a3acd5 100644
--- a/src/render-delaying-services.js
+++ b/src/render-delaying-services.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {devAssert} from './log';
diff --git a/src/runtime.js b/src/runtime.js
index 86485e832f62..06ebd640180b 100644
--- a/src/runtime.js
+++ b/src/runtime.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {waitForBodyOpenPromise} from '#core/dom';
 import {setStyle} from '#core/dom/style';
 import * as mode from '#core/mode';
diff --git a/src/sanitizer.js b/src/sanitizer.js
index a3353f22de42..5594e29412e6 100644
--- a/src/sanitizer.js
+++ b/src/sanitizer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {
diff --git a/src/service-helpers.js b/src/service-helpers.js
index fbb4410ffe7e..4255090a2419 100644
--- a/src/service-helpers.js
+++ b/src/service-helpers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Registration and getter functions for AMP services.
  *
diff --git a/src/service/action-impl.js b/src/service/action-impl.js
index c804617a0188..c9508b8829ab 100644
--- a/src/service/action-impl.js
+++ b/src/service/action-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   ActionTrust,
   DEFAULT_ACTION,
diff --git a/src/service/ampdoc-impl.js b/src/service/ampdoc-impl.js
index c9a3e49c6e1f..dd0a5d9e316b 100644
--- a/src/service/ampdoc-impl.js
+++ b/src/service/ampdoc-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {VisibilityState} from '#core/constants/visibility-state';
 import {Observable} from '#core/data-structures/observable';
 import {Deferred} from '#core/data-structures/promise';
diff --git a/src/service/batched-xhr-impl.js b/src/service/batched-xhr-impl.js
index 45709e459d09..093f7a4c7f3c 100644
--- a/src/service/batched-xhr-impl.js
+++ b/src/service/batched-xhr-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {map} from '#core/types/object';
 
 import {Xhr} from './xhr-impl';
diff --git a/src/service/cache-cid-api.js b/src/service/cache-cid-api.js
index ae33de7b0889..cc6a828c6add 100644
--- a/src/service/cache-cid-api.js
+++ b/src/service/cache-cid-api.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {Services} from '#service';
diff --git a/src/service/cid-api.js b/src/service/cid-api.js
index 192645d506d0..820ad542d992 100644
--- a/src/service/cid-api.js
+++ b/src/service/cid-api.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 import {WindowInterface} from '#core/window/interface';
 
diff --git a/src/service/cid-impl.js b/src/service/cid-impl.js
index b435b8dc45ef..ac547f33fbfa 100644
--- a/src/service/cid-impl.js
+++ b/src/service/cid-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Provides per AMP document source origin and use case
  * persistent client identifiers for use in analytics and similar use
diff --git a/src/service/core-services.js b/src/service/core-services.js
index c935c4a1720e..41ff6ef4c9b3 100644
--- a/src/service/core-services.js
+++ b/src/service/core-services.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {installImg} from '#builtins/amp-img/amp-img';
 import {installLayout} from '#builtins/amp-layout/amp-layout';
 import {installPixel} from '#builtins/amp-pixel/amp-pixel';
diff --git a/src/service/crypto-impl.js b/src/service/crypto-impl.js
index 658deab1e48d..f9dbe190d253 100644
--- a/src/service/crypto-impl.js
+++ b/src/service/crypto-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {base64UrlEncodeFromBytes} from '#core/types/string/base64';
 import {stringToBytes, utf8Encode} from '#core/types/string/bytes';
 
diff --git a/src/service/custom-element-registry.js b/src/service/custom-element-registry.js
index 4fcffe46bc7c..0ed07e71d5e3 100644
--- a/src/service/custom-element-registry.js
+++ b/src/service/custom-element-registry.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {extensionScriptsInNode} from './extension-script';
diff --git a/src/service/document-info-impl.js b/src/service/document-info-impl.js
index 8b50218640f1..16b6f4a39fb1 100644
--- a/src/service/document-info-impl.js
+++ b/src/service/document-info-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isArray} from '#core/types';
 import {map} from '#core/types/object';
 import {parseQueryString} from '#core/types/string/url';
diff --git a/src/service/extension-script.js b/src/service/extension-script.js
index 7a016c6bdf0d..05408e07d840 100644
--- a/src/service/extension-script.js
+++ b/src/service/extension-script.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as mode from '#core/mode';
 
 import {urls} from '../config';
diff --git a/src/service/extensions-impl.js b/src/service/extensions-impl.js
index ddcd2a50b95c..19ac24de9f60 100644
--- a/src/service/extensions-impl.js
+++ b/src/service/extensions-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {rethrowAsync} from '#core/error';
 import {map} from '#core/types/object';
diff --git a/src/service/fixed-layer.js b/src/service/fixed-layer.js
index 78c2d5bab560..5de187d4d57f 100644
--- a/src/service/fixed-layer.js
+++ b/src/service/fixed-layer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {domOrderComparator} from '#core/dom';
 import {closest, matches} from '#core/dom/query';
 import {
diff --git a/src/service/hidden-observer-impl.js b/src/service/hidden-observer-impl.js
index 46dd13253772..bec71bef2e68 100644
--- a/src/service/hidden-observer-impl.js
+++ b/src/service/hidden-observer-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Observable} from '#core/data-structures/observable';
 
 import {devAssert} from '../log';
diff --git a/src/service/history-impl.js b/src/service/history-impl.js
index 3df609645119..01915327fdc8 100644
--- a/src/service/history-impl.js
+++ b/src/service/history-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred, tryResolve} from '#core/data-structures/promise';
 import {dict, map} from '#core/types/object';
 import {getHistoryState} from '#core/window/history';
diff --git a/src/service/ie-intrinsic-bug.js b/src/service/ie-intrinsic-bug.js
index bedf90ca28ad..ae8248338527 100644
--- a/src/service/ie-intrinsic-bug.js
+++ b/src/service/ie-intrinsic-bug.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {transparentPng} from '#core/dom/img';
 import {getLengthNumeral} from '#core/dom/layout';
 import {closestAncestorElementBySelector} from '#core/dom/query';
diff --git a/src/service/ie-media-bug.js b/src/service/ie-media-bug.js
index 414ae1f417d4..55d19d4b29bb 100644
--- a/src/service/ie-media-bug.js
+++ b/src/service/ie-media-bug.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {dev} from '../log';
diff --git a/src/service/index.js b/src/service/index.js
index 819d0f37e3a8..a96803673d04 100644
--- a/src/service/index.js
+++ b/src/service/index.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   getElementServiceForDoc,
   getElementServiceIfAvailable,
diff --git a/src/service/loader-element.js b/src/service/loader-element.js
index fec0f7346697..448595a37a9d 100644
--- a/src/service/loader-element.js
+++ b/src/service/loader-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 /**
diff --git a/src/service/loading-indicator.js b/src/service/loading-indicator.js
index cb6347749647..692e82adff0a 100644
--- a/src/service/loading-indicator.js
+++ b/src/service/loading-indicator.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeElement} from '#core/dom';
 import {createViewportObserver} from '#core/dom/layout/viewport-observer';
 import {htmlFor} from '#core/dom/static-template';
diff --git a/src/service/localization/index.js b/src/service/localization/index.js
index b5aa204d207a..485d00ae93e0 100644
--- a/src/service/localization/index.js
+++ b/src/service/localization/index.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {closest} from '#core/dom/query';
 
 import {Services} from '#service';
diff --git a/src/service/localization/strings.js b/src/service/localization/strings.js
index c3673797c243..f277cc9b8774 100644
--- a/src/service/localization/strings.js
+++ b/src/service/localization/strings.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {parseJson} from '#core/types/object/json';
 
 /**
diff --git a/src/service/mutator-impl.js b/src/service/mutator-impl.js
index d97df859b5b6..7639b26a877b 100644
--- a/src/service/mutator-impl.js
+++ b/src/service/mutator-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {areMarginsChanged} from '#core/dom/layout/rect';
 import {closest} from '#core/dom/query';
 import {computedStyle} from '#core/dom/style';
diff --git a/src/service/mutator-interface.js b/src/service/mutator-interface.js
index 1e6644d18fdb..a43e03fcf71e 100644
--- a/src/service/mutator-interface.js
+++ b/src/service/mutator-interface.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /* eslint-disable no-unused-vars */
 /**
  * @interface
diff --git a/src/service/navigation.js b/src/service/navigation.js
index 10d70a4ddde9..441de685f83b 100644
--- a/src/service/navigation.js
+++ b/src/service/navigation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {PriorityQueue} from '#core/data-structures/priority-queue';
 import {isIframed, tryFocus} from '#core/dom';
 import {escapeCssSelectorIdent} from '#core/dom/css-selectors';
diff --git a/src/service/notification-ui-manager.js b/src/service/notification-ui-manager.js
index 87171707125e..f9834a118f74 100644
--- a/src/service/notification-ui-manager.js
+++ b/src/service/notification-ui-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 export const NOTIFICATION_UI_MANAGER = 'notificationUIManager';
 
 export class NotificationUiManager {
diff --git a/src/service/origin-experiments-impl.js b/src/service/origin-experiments-impl.js
index 5591f0d0205a..001a563b28a6 100644
--- a/src/service/origin-experiments-impl.js
+++ b/src/service/origin-experiments-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseJson} from '#core/types/object/json';
 import {bytesToString, stringToBytes} from '#core/types/string/bytes';
 
diff --git a/src/service/owners-impl.js b/src/service/owners-impl.js
index 3cddfde66a7d..293ad155ff5f 100644
--- a/src/service/owners-impl.js
+++ b/src/service/owners-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isArray} from '#core/types';
 
 import {Services} from '#service';
diff --git a/src/service/owners-interface.js b/src/service/owners-interface.js
index a5b4a41564c1..2313e4dfeaf3 100644
--- a/src/service/owners-interface.js
+++ b/src/service/owners-interface.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /* eslint-disable no-unused-vars */
 /**
  * @interface
diff --git a/src/service/performance-impl.js b/src/service/performance-impl.js
index 7eeffc6d4fc8..9ced5b6a59b7 100644
--- a/src/service/performance-impl.js
+++ b/src/service/performance-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {TickLabel} from '#core/constants/enums';
 import {VisibilityState} from '#core/constants/visibility-state';
 import {Signals} from '#core/data-structures/signals';
diff --git a/src/service/platform-impl.js b/src/service/platform-impl.js
index 2d9d8efbcdf2..4603cbb40301 100644
--- a/src/service/platform-impl.js
+++ b/src/service/platform-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as mode from '#core/mode';
 
 import {registerServiceBuilder} from '../service-helpers';
diff --git a/src/service/position-observer/position-observer-impl.js b/src/service/position-observer/position-observer-impl.js
index 210875a96b38..e660bd9275ee 100644
--- a/src/service/position-observer/position-observer-impl.js
+++ b/src/service/position-observer/position-observer-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {debounce} from '#core/types/function';
 
 import {Services} from '#service';
diff --git a/src/service/position-observer/position-observer-worker.js b/src/service/position-observer/position-observer-worker.js
index 6e59a2b24011..07bfab3a96ff 100644
--- a/src/service/position-observer/position-observer-worker.js
+++ b/src/service/position-observer/position-observer-worker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   layoutRectEquals,
   layoutRectLtwh,
diff --git a/src/service/real-time-config/callout-vendors.js b/src/service/real-time-config/callout-vendors.js
index 08ddad006230..b0ef1ec3578c 100644
--- a/src/service/real-time-config/callout-vendors.js
+++ b/src/service/real-time-config/callout-vendors.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {jsonConfiguration} from '#core/types/object/json';
 
 import {getMode} from '../../mode';
diff --git a/src/service/real-time-config/real-time-config-impl.js b/src/service/real-time-config/real-time-config-impl.js
index 79f57f282b87..088b014c33ce 100644
--- a/src/service/real-time-config/real-time-config-impl.js
+++ b/src/service/real-time-config/real-time-config-impl.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {CONSENT_POLICY_STATE} from '#core/constants/consent-state';
 import {isArray, isObject} from '#core/types';
 import {tryParseJson} from '#core/types/object/json';
diff --git a/src/service/resource.js b/src/service/resource.js
index 82c0478488ba..54b0ea4062fd 100644
--- a/src/service/resource.js
+++ b/src/service/resource.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {Layout} from '#core/dom/layout';
 import {
diff --git a/src/service/resources-impl.js b/src/service/resources-impl.js
index 16b0432d40a8..703951ba3a25 100644
--- a/src/service/resources-impl.js
+++ b/src/service/resources-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {VisibilityState} from '#core/constants/visibility-state';
 import {FiniteStateMachine} from '#core/data-structures/finite-state-machine';
 import {Deferred} from '#core/data-structures/promise';
diff --git a/src/service/resources-interface.js b/src/service/resources-interface.js
index 300250716506..8ee3a4dbc195 100644
--- a/src/service/resources-interface.js
+++ b/src/service/resources-interface.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /** @const {string} */
 export const READY_SCAN_SIGNAL = 'ready-scan';
 
diff --git a/src/service/scheduler.js b/src/service/scheduler.js
index b9d21187fd0b..e62223608c6c 100644
--- a/src/service/scheduler.js
+++ b/src/service/scheduler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {VisibilityState} from '#core/constants/visibility-state';
 import {
   containsNotSelf,
diff --git a/src/service/standard-actions-impl.js b/src/service/standard-actions-impl.js
index c92656d9d1c7..d5535ea1322b 100644
--- a/src/service/standard-actions-impl.js
+++ b/src/service/standard-actions-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {tryFocus} from '#core/dom';
 import {Layout, getLayoutClass} from '#core/dom/layout';
diff --git a/src/service/storage-impl.js b/src/service/storage-impl.js
index 66da82cb6d8a..2ca9dec92342 100644
--- a/src/service/storage-impl.js
+++ b/src/service/storage-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict, recreateNonProtoObject} from '#core/types/object';
 import {parseJson} from '#core/types/object/json';
 
diff --git a/src/service/task-queue.js b/src/service/task-queue.js
index 61cba6b97fb0..4184b7dff031 100644
--- a/src/service/task-queue.js
+++ b/src/service/task-queue.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert} from '../log';
 
 /**
diff --git a/src/service/template-impl.js b/src/service/template-impl.js
index 91b5ba301894..9267b7a0b918 100644
--- a/src/service/template-impl.js
+++ b/src/service/template-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {rootNodeFor} from '#core/dom';
 import {scopedQuerySelector} from '#core/dom/query';
diff --git a/src/service/timer-impl.js b/src/service/timer-impl.js
index 5a400f5d5337..2ffa50123036 100644
--- a/src/service/timer-impl.js
+++ b/src/service/timer-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {reportError} from '../error-reporting';
 import {user} from '../log';
 import {getMode} from '../mode';
diff --git a/src/service/url-expander/expander.js b/src/service/url-expander/expander.js
index dc2db113a6e3..1a38ae7a41cb 100644
--- a/src/service/url-expander/expander.js
+++ b/src/service/url-expander/expander.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {tryResolve} from '#core/data-structures/promise';
 import {rethrowAsync} from '#core/error';
 import {hasOwn} from '#core/types/object';
diff --git a/src/service/url-impl.js b/src/service/url-impl.js
index 78d687c6e8f7..f0d652fdd334 100644
--- a/src/service/url-impl.js
+++ b/src/service/url-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {LruCache} from '#core/data-structures/lru-cache';
 import * as mode from '#core/mode';
 
diff --git a/src/service/url-replacements-impl.js b/src/service/url-replacements-impl.js
index 1a6566c2f9d6..b0e32d4fe12a 100644
--- a/src/service/url-replacements-impl.js
+++ b/src/service/url-replacements-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as mode from '#core/mode';
 import {hasOwn} from '#core/types/object';
 import {getHashParams, parseQueryString} from '#core/types/string/url';
diff --git a/src/service/variable-source.js b/src/service/variable-source.js
index 361490ed4ea3..52f0c81ff531 100644
--- a/src/service/variable-source.js
+++ b/src/service/variable-source.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {whenDocumentComplete} from '#core/document-ready';
 import {isFiniteNumber} from '#core/types';
 
diff --git a/src/service/video-manager-impl.js b/src/service/video-manager-impl.js
index 9e48dfdf4970..b8d36e0fb1ab 100644
--- a/src/service/video-manager-impl.js
+++ b/src/service/video-manager-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ActionTrust} from '#core/constants/action-constants';
 import {dispatchCustomEvent, removeElement} from '#core/dom';
 import {measureIntersection} from '#core/dom/layout/intersection';
diff --git a/src/service/video-session-manager.js b/src/service/video-session-manager.js
index 1031d6f5582e..b8ff5410cc6b 100644
--- a/src/service/video-session-manager.js
+++ b/src/service/video-session-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Observable} from '#core/data-structures/observable';
 
 export class VideoSessionManager {
diff --git a/src/service/video/autoplay.js b/src/service/video/autoplay.js
index 904f354c4678..bde8e51f2f3b 100644
--- a/src/service/video/autoplay.js
+++ b/src/service/video/autoplay.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeElement} from '#core/dom';
 import {htmlFor} from '#core/dom/static-template';
 
diff --git a/src/service/video/install-autoplay-styles.js b/src/service/video/install-autoplay-styles.js
index e598277aaf52..df01995ec5e2 100644
--- a/src/service/video/install-autoplay-styles.js
+++ b/src/service/video/install-autoplay-styles.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {cssText} from '../../../build/video-autoplay.css';
 import {installStylesForDoc} from '../../style-installer';
 // Source for this constant is css/video-autoplay.css
diff --git a/src/service/viewer-cid-api.js b/src/service/viewer-cid-api.js
index 26d28069656d..241fb5cb0fc7 100644
--- a/src/service/viewer-cid-api.js
+++ b/src/service/viewer-cid-api.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {Services} from '#service';
diff --git a/src/service/viewer-impl.js b/src/service/viewer-impl.js
index fdb7995564d7..5572024b020a 100644
--- a/src/service/viewer-impl.js
+++ b/src/service/viewer-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {VisibilityState} from '#core/constants/visibility-state';
 import {Observable} from '#core/data-structures/observable';
 import {Deferred, tryResolve} from '#core/data-structures/promise';
diff --git a/src/service/viewer-interface.js b/src/service/viewer-interface.js
index bbfb937a4819..f0f6fccaba5a 100644
--- a/src/service/viewer-interface.js
+++ b/src/service/viewer-interface.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @typedef {function(!JsonObject):(!Promise|undefined)}
  */
diff --git a/src/service/viewport/viewport-binding-def.js b/src/service/viewport/viewport-binding-def.js
index 18332638d57e..65a66ff45af2 100644
--- a/src/service/viewport/viewport-binding-def.js
+++ b/src/service/viewport/viewport-binding-def.js
@@ -1,21 +1,5 @@
 import {computedStyle} from '#core/dom/style';
 
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * ViewportBindingDef is an interface that defines an underlying technology
  * behind the {@link ViewportInterface}.
diff --git a/src/service/viewport/viewport-binding-ios-embed-wrapper.js b/src/service/viewport/viewport-binding-ios-embed-wrapper.js
index 59127f5d070d..1b24e9fcf48b 100644
--- a/src/service/viewport/viewport-binding-ios-embed-wrapper.js
+++ b/src/service/viewport/viewport-binding-ios-embed-wrapper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Observable} from '#core/data-structures/observable';
 import {whenDocumentReady} from '#core/document-ready';
 import {waitForBodyOpen} from '#core/dom';
diff --git a/src/service/viewport/viewport-binding-natural.js b/src/service/viewport/viewport-binding-natural.js
index 961259152d9a..2aea9cd8d069 100644
--- a/src/service/viewport/viewport-binding-natural.js
+++ b/src/service/viewport/viewport-binding-natural.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Observable} from '#core/data-structures/observable';
 import {layoutRectLtwh} from '#core/dom/layout/rect';
 import {computedStyle, px, setImportantStyles} from '#core/dom/style';
diff --git a/src/service/viewport/viewport-impl.js b/src/service/viewport/viewport-impl.js
index 0aa44af67c5c..ff2246a58c05 100644
--- a/src/service/viewport/viewport-impl.js
+++ b/src/service/viewport/viewport-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {VisibilityState} from '#core/constants/visibility-state';
 import {Observable} from '#core/data-structures/observable';
 import {tryResolve} from '#core/data-structures/promise';
diff --git a/src/service/viewport/viewport-interface.js b/src/service/viewport/viewport-interface.js
index e5e59b337ec7..8784f6537993 100644
--- a/src/service/viewport/viewport-interface.js
+++ b/src/service/viewport/viewport-interface.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Disposable} from '../../service-helpers';
 
 /**
diff --git a/src/service/vsync-impl.js b/src/service/vsync-impl.js
index 741f6b1e37e4..bccd058648aa 100644
--- a/src/service/vsync-impl.js
+++ b/src/service/vsync-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {
   addDocumentVisibilityChangeListener,
diff --git a/src/service/xhr-impl.js b/src/service/xhr-impl.js
index fea66cd665bc..dbfffca868dd 100644
--- a/src/service/xhr-impl.js
+++ b/src/service/xhr-impl.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseJson} from '#core/types/object/json';
 
 import {Services} from '#service';
diff --git a/src/shadow-embed.js b/src/shadow-embed.js
index 96477dcd7873..0fd126b603dd 100644
--- a/src/shadow-embed.js
+++ b/src/shadow-embed.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {iterateCursor} from '#core/dom';
 import {escapeCssSelectorIdent} from '#core/dom/css-selectors';
 import {setInitialDisplay, setStyle} from '#core/dom/style';
diff --git a/src/ssr-template-helper.js b/src/ssr-template-helper.js
index 0650c6a28284..6810e26328d9 100644
--- a/src/ssr-template-helper.js
+++ b/src/ssr-template-helper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isArray} from '#core/types';
 import {dict} from '#core/types/object';
 
diff --git a/src/standalone.js b/src/standalone.js
index eb5b72d60152..2c5cf93a2d96 100644
--- a/src/standalone.js
+++ b/src/standalone.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {ChunkPriority, chunk} from './chunk';
diff --git a/src/static-layout.js b/src/static-layout.js
index 58493dd67f25..400339d699ce 100644
--- a/src/static-layout.js
+++ b/src/static-layout.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   devAssert,
   devAssertNumber,
diff --git a/src/style-installer.js b/src/style-installer.js
index 410646e083a2..e2eb84a7d7e3 100644
--- a/src/style-installer.js
+++ b/src/style-installer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CommonSignals} from '#core/constants/common-signals';
 import {TickLabel} from '#core/constants/enums';
 import {insertAfterOrAtStart, waitForBodyOpenPromise} from '#core/dom';
diff --git a/src/url-rewrite.js b/src/url-rewrite.js
index 17fb18e615ec..9daa88bdbd9b 100644
--- a/src/url-rewrite.js
+++ b/src/url-rewrite.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseSrcset} from '#core/dom/srcset';
 
 import {urls} from './config';
diff --git a/src/url.js b/src/url.js
index c26b595a3d6e..9a47a809b6a3 100644
--- a/src/url.js
+++ b/src/url.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {LruCache} from '#core/data-structures/lru-cache';
 import * as mode from '#core/mode';
 import {arrayOrSingleItemToArray} from '#core/types/array';
diff --git a/src/utils/display-observer.js b/src/utils/display-observer.js
index 4b480a3eac2d..e8a1e2b6271f 100644
--- a/src/utils/display-observer.js
+++ b/src/utils/display-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {VisibilityState} from '#core/constants/visibility-state';
 import {containsNotSelf} from '#core/dom';
 import {rethrowAsync} from '#core/error';
diff --git a/src/utils/dom-ancestor-visitor.js b/src/utils/dom-ancestor-visitor.js
index 197253c6195d..d25b7b745634 100644
--- a/src/utils/dom-ancestor-visitor.js
+++ b/src/utils/dom-ancestor-visitor.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {devAssert, devAssertElement} from '#core/assert';
 import {computedStyle} from '#core/dom/style';
 
diff --git a/src/utils/dom-tranform-stream.js b/src/utils/dom-tranform-stream.js
index f58870a1d839..2bd069a5e7d2 100644
--- a/src/utils/dom-tranform-stream.js
+++ b/src/utils/dom-tranform-stream.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert, devAssertElement} from '#core/assert';
 import {Deferred} from '#core/data-structures/promise';
 
diff --git a/src/utils/dom-writer.js b/src/utils/dom-writer.js
index 148e8e7b8c59..320151d5722d 100644
--- a/src/utils/dom-writer.js
+++ b/src/utils/dom-writer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert} from '#core/assert';
 import {iterateCursor, removeElement} from '#core/dom';
 import {childElementsByTag} from '#core/dom/query';
diff --git a/src/utils/intersection-observer-3p-host.js b/src/utils/intersection-observer-3p-host.js
index 5b46463d2e24..86dc4700927c 100644
--- a/src/utils/intersection-observer-3p-host.js
+++ b/src/utils/intersection-observer-3p-host.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {MessageType} from '#core/3p-frame-messaging';
 import {
   layoutRectLtwh,
diff --git a/src/utils/story.js b/src/utils/story.js
index 9e9277b356b7..41b685093be0 100644
--- a/src/utils/story.js
+++ b/src/utils/story.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {waitForChildPromise} from '#core/dom';
 import {closestAncestorElementBySelector} from '#core/dom/query';
 
diff --git a/src/utils/xhr-utils.js b/src/utils/xhr-utils.js
index ab1e3127337f..6efa7d65bdd2 100644
--- a/src/utils/xhr-utils.js
+++ b/src/utils/xhr-utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert, userAssert} from '#core/assert';
 import {fromIterator, isArray} from '#core/types/array';
 import {dict, isObject, map} from '#core/types/object';
diff --git a/src/validator-integration.js b/src/validator-integration.js
index b0014af7b97e..743b31a9a9f9 100644
--- a/src/validator-integration.js
+++ b/src/validator-integration.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getHashParams} from '#core/types/string/url';
 
 import {urls} from './config';
diff --git a/src/video-iframe-integration.js b/src/video-iframe-integration.js
index 655d317828bd..8fc6bab6ac27 100644
--- a/src/video-iframe-integration.js
+++ b/src/video-iframe-integration.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 /* eslint-disable local/window-property-name */
 
 import {tryResolve} from '#core/data-structures/promise';
diff --git a/src/video-interface.js b/src/video-interface.js
index ac0b1c69e9ad..377826506d62 100644
--- a/src/video-interface.js
+++ b/src/video-interface.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssertElement} from '#core/assert';
 import {whenUpgradedToCustomElement} from '#core/dom/amp-element-helpers';
 
diff --git a/src/web-worker/amp-worker.js b/src/web-worker/amp-worker.js
index f676fccd9573..d8e3f708c857 100644
--- a/src/web-worker/amp-worker.js
+++ b/src/web-worker/amp-worker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert} from '#core/assert';
 
 import {Services} from '#service';
diff --git a/src/web-worker/web-worker-polyfills.js b/src/web-worker/web-worker-polyfills.js
index 848deb558624..0887dc6c27c0 100644
--- a/src/web-worker/web-worker-polyfills.js
+++ b/src/web-worker/web-worker-polyfills.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Directly imported into web-worker.js entry point so polyfills
  *     can be used in top-level scope in module dependencies.
diff --git a/src/web-worker/web-worker.js b/src/web-worker/web-worker.js
index d8e2acfaa06d..b4033ce25093 100644
--- a/src/web-worker/web-worker.js
+++ b/src/web-worker/web-worker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview Web worker entry point. Currently only used by a single
  *   extension (amp-bind), so dependencies are directly imported.
diff --git a/test/e2e/test-adchoices.js b/test/e2e/test-adchoices.js
index 7ef3a058c4bd..de34f668720d 100644
--- a/test/e2e/test-adchoices.js
+++ b/test/e2e/test-adchoices.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'ad choices',
   {
diff --git a/test/e2e/test-amp-bind-brightcove.js b/test/e2e/test-amp-bind-brightcove.js
index 375dfcab047f..89abd957d996 100644
--- a/test/e2e/test-amp-bind-brightcove.js
+++ b/test/e2e/test-amp-bind-brightcove.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-bind',
   {
diff --git a/test/e2e/test-amp-bind-email.js b/test/e2e/test-amp-bind-email.js
index b2b5c622a9d7..faaeacad3073 100644
--- a/test/e2e/test-amp-bind-email.js
+++ b/test/e2e/test-amp-bind-email.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-bind',
   {
diff --git a/test/e2e/test-amp-bind-form.js b/test/e2e/test-amp-bind-form.js
index a03454c8b982..5fb728bc6df6 100644
--- a/test/e2e/test-amp-bind-form.js
+++ b/test/e2e/test-amp-bind-form.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-bind',
   {
diff --git a/test/e2e/test-amp-bind-iframe.js b/test/e2e/test-amp-bind-iframe.js
index 988397bc3311..48b61a8654d2 100644
--- a/test/e2e/test-amp-bind-iframe.js
+++ b/test/e2e/test-amp-bind-iframe.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-bind',
   {
diff --git a/test/e2e/test-amp-bind-live-list.js b/test/e2e/test-amp-bind-live-list.js
index c066f9182feb..f163803c240b 100644
--- a/test/e2e/test-amp-bind-live-list.js
+++ b/test/e2e/test-amp-bind-live-list.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-bind',
   {
diff --git a/test/e2e/test-amp-bind-state.js b/test/e2e/test-amp-bind-state.js
index f387492a49d6..68800444816d 100644
--- a/test/e2e/test-amp-bind-state.js
+++ b/test/e2e/test-amp-bind-state.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-bind',
   {
diff --git a/test/e2e/test-amp-bind-video.js b/test/e2e/test-amp-bind-video.js
index 9753090c67ce..ff1a1a18c394 100644
--- a/test/e2e/test-amp-bind-video.js
+++ b/test/e2e/test-amp-bind-video.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-bind with <amp-video>',
   {
diff --git a/test/e2e/test-amp-bind-youtube.js b/test/e2e/test-amp-bind-youtube.js
index 8849e9db183a..5a76144de078 100644
--- a/test/e2e/test-amp-bind-youtube.js
+++ b/test/e2e/test-amp-bind-youtube.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'amp-bind',
   {
diff --git a/test/e2e/test-amp-email.js b/test/e2e/test-amp-email.js
index 9f77354509c0..1d3e1347893d 100644
--- a/test/e2e/test-amp-email.js
+++ b/test/e2e/test-amp-email.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'layoutCallback depends on updated viewport size after documentHeight change.',
   {
diff --git a/test/e2e/test-amp-story-player-navigation.js b/test/e2e/test-amp-story-player-navigation.js
index 13d44f1e55a6..ebad93905f27 100644
--- a/test/e2e/test-amp-story-player-navigation.js
+++ b/test/e2e/test-amp-story-player-navigation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const VIEWPORT = {
   HEIGHT: 768,
   WIDTH: 1024,
diff --git a/test/e2e/test-amp-story-player-prerender.js b/test/e2e/test-amp-story-player-prerender.js
index c5707df02857..8dcc2980121e 100644
--- a/test/e2e/test-amp-story-player-prerender.js
+++ b/test/e2e/test-amp-story-player-prerender.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const VIEWPORT = {
   HEIGHT: 768,
   WIDTH: 1024,
diff --git a/test/e2e/test-amp-story-player.js b/test/e2e/test-amp-story-player.js
index 29dde67baf95..0838c35a0606 100644
--- a/test/e2e/test-amp-story-player.js
+++ b/test/e2e/test-amp-story-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 const VIEWPORT = {
   HEIGHT: 768,
   WIDTH: 1024,
diff --git a/test/e2e/test-controller-promise.js b/test/e2e/test-controller-promise.js
index 6d4fd3d7edfa..2e42ca2c5550 100644
--- a/test/e2e/test-controller-promise.js
+++ b/test/e2e/test-controller-promise.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import sinon from /*OK*/ 'sinon';
 
 import {ControllerPromise} from '../../build-system/tasks/e2e/controller-promise';
diff --git a/test/e2e/test-document-height.js b/test/e2e/test-document-height.js
index 91baecd27773..59e574808805 100644
--- a/test/e2e/test-document-height.js
+++ b/test/e2e/test-document-height.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.endtoend(
   'documentHeight',
   {
diff --git a/test/e2e/test-expect.js b/test/e2e/test-expect.js
index 6bf841e62384..3add65256027 100644
--- a/test/e2e/test-expect.js
+++ b/test/e2e/test-expect.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ControllerPromise} from '../../build-system/tasks/e2e/controller-promise';
 
 describe('e2e expect', () => {
diff --git a/test/fixtures/e2e/amp-script/basic.js b/test/fixtures/e2e/amp-script/basic.js
index 68e5e64963df..86a123e815c2 100644
--- a/test/fixtures/e2e/amp-script/basic.js
+++ b/test/fixtures/e2e/amp-script/basic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 document.querySelector('button').addEventListener('click', () => {
   const el = document.createElement('h1');
   el.textContent = 'Hello World!';
diff --git a/test/integration/builtins/test-amp-img.js b/test/integration/builtins/test-amp-img.js
index aabf6344f665..64b2ad9bc243 100644
--- a/test/integration/builtins/test-amp-img.js
+++ b/test/integration/builtins/test-amp-img.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 
 import {
diff --git a/test/integration/builtins/test-amp-pixel.js b/test/integration/builtins/test-amp-pixel.js
index 4587a20be0ca..63bbf50b8a61 100644
--- a/test/integration/builtins/test-amp-pixel.js
+++ b/test/integration/builtins/test-amp-pixel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpPixel} from '#builtins/amp-pixel/amp-pixel';
 
 import {createElementWithAttributes} from '#core/dom';
diff --git a/test/integration/test-3p-nameframe.js b/test/integration/test-3p-nameframe.js
index c17684c01790..51cd958743ed 100644
--- a/test/integration/test-3p-nameframe.js
+++ b/test/integration/test-3p-nameframe.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 describes.sandboxed.skip('alt nameframe', {}, function () {
   describes.sandboxed('alt nameframe', {}, () => {
     describes.realWin('nameframe', {allowExternalResources: true}, (env) => {
diff --git a/test/integration/test-actions.js b/test/integration/test-actions.js
index 58bcb8cd4247..3f733af18623 100644
--- a/test/integration/test-actions.js
+++ b/test/integration/test-actions.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {poll} from '#testing/iframe';
 import {BrowserController} from '#testing/test-helper';
 
diff --git a/test/integration/test-amp-ad-3p.js b/test/integration/test-amp-ad-3p.js
index 007074830292..22ae77e32699 100644
--- a/test/integration/test-amp-ad-3p.js
+++ b/test/integration/test-amp-ad-3p.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {layoutRectLtwh} from '#core/dom/layout/rect';
 
 import {forceExperimentBranch} from '#experiments';
diff --git a/test/integration/test-amp-ad-doubleclick.js b/test/integration/test-amp-ad-doubleclick.js
index 94f6634952f0..3ba9b7bd3b28 100644
--- a/test/integration/test-amp-ad-doubleclick.js
+++ b/test/integration/test-amp-ad-doubleclick.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createFixtureIframe, poll, pollForLayout} from '#testing/iframe';
 
 describes.sandboxed
diff --git a/test/integration/test-amp-ad-type-custom.js b/test/integration/test-amp-ad-type-custom.js
index c4e0863c5f90..b3cbc7233c92 100644
--- a/test/integration/test-amp-ad-type-custom.js
+++ b/test/integration/test-amp-ad-type-custom.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BrowserController} from '#testing/test-helper';
 
 describes.integration(
diff --git a/test/integration/test-amp-analytics.js b/test/integration/test-amp-analytics.js
index 50c1e1536401..3ffe77b98c66 100644
--- a/test/integration/test-amp-analytics.js
+++ b/test/integration/test-amp-analytics.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseQueryString} from '#core/types/string/url';
 
 import {BrowserController, RequestBank} from '#testing/test-helper';
diff --git a/test/integration/test-amp-bind.js b/test/integration/test-amp-bind.js
index 47cadd154c0a..b5b22630d63c 100644
--- a/test/integration/test-amp-bind.js
+++ b/test/integration/test-amp-bind.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {poll as classicPoll} from '#testing/iframe';
 import {BrowserController} from '#testing/test-helper';
 
diff --git a/test/integration/test-amp-carousel.js b/test/integration/test-amp-carousel.js
index 2c2a4668ac6a..43817c8a28b9 100644
--- a/test/integration/test-amp-carousel.js
+++ b/test/integration/test-amp-carousel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CommonSignals} from '#core/constants/common-signals';
 import {whenUpgradedToCustomElement} from '#core/dom/amp-element-helpers';
 
diff --git a/test/integration/test-amp-recaptcha-input.js b/test/integration/test-amp-recaptcha-input.js
index a9ac511e116e..342eb2234c01 100644
--- a/test/integration/test-amp-recaptcha-input.js
+++ b/test/integration/test-amp-recaptcha-input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 
 import {poll} from '#testing/iframe';
diff --git a/test/integration/test-amp-skimlinks.js b/test/integration/test-amp-skimlinks.js
index bd6843c6adcf..50fa6f99c129 100644
--- a/test/integration/test-amp-skimlinks.js
+++ b/test/integration/test-amp-skimlinks.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseQueryString} from '#core/types/string/url';
 
 import {BrowserController, RequestBank} from '#testing/test-helper';
diff --git a/test/integration/test-amp-story-analytics.js b/test/integration/test-amp-story-analytics.js
index 68c2bdcecbc8..0f3edce11893 100644
--- a/test/integration/test-amp-story-analytics.js
+++ b/test/integration/test-amp-story-analytics.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseQueryString} from '#core/types/string/url';
 
 import {BrowserController, RequestBank} from '#testing/test-helper';
diff --git a/test/integration/test-amphtml-ads.js b/test/integration/test-amphtml-ads.js
index 5606b422e1e7..19ded5fac3f1 100644
--- a/test/integration/test-amphtml-ads.js
+++ b/test/integration/test-amphtml-ads.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseQueryString} from '#core/types/string/url';
 
 import {xhrServiceForTesting} from '#service/xhr-impl';
diff --git a/test/integration/test-boilerplates.js b/test/integration/test-boilerplates.js
index d316c7320fc0..dbe55b6ee317 100644
--- a/test/integration/test-boilerplates.js
+++ b/test/integration/test-boilerplates.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getStyle} from '#core/dom/style';
 
 import {createFixtureIframe, expectBodyToBecomeVisible} from '#testing/iframe';
diff --git a/test/integration/test-configuration.js b/test/integration/test-configuration.js
index c8d2f10d8b03..f99ba34e4145 100644
--- a/test/integration/test-configuration.js
+++ b/test/integration/test-configuration.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 
 import {createFixtureIframe} from '#testing/iframe';
diff --git a/test/integration/test-css.js b/test/integration/test-css.js
index 35e657a323e0..b3f6b957d755 100644
--- a/test/integration/test-css.js
+++ b/test/integration/test-css.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 import {computedStyle} from '#core/dom/style';
 
diff --git a/test/integration/test-double-loading.js b/test/integration/test-double-loading.js
index 59caf8480340..899205486d62 100644
--- a/test/integration/test-double-loading.js
+++ b/test/integration/test-double-loading.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 
 import {createFixtureIframe} from '#testing/iframe';
diff --git a/test/integration/test-errors.js b/test/integration/test-errors.js
index bc9544cc2023..21ec0e3f7ef2 100644
--- a/test/integration/test-errors.js
+++ b/test/integration/test-errors.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   createFixtureIframe,
   expectBodyToBecomeVisible,
diff --git a/test/integration/test-extensions-loading.js b/test/integration/test-extensions-loading.js
index f0786d80a8fd..984f2727e518 100644
--- a/test/integration/test-extensions-loading.js
+++ b/test/integration/test-extensions-loading.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpEvents} from '#core/constants/amp-events';
 
 import {createFixtureIframe} from '#testing/iframe';
diff --git a/test/integration/test-position-observer.js b/test/integration/test-position-observer.js
index b70bce2fd5a9..d27e596798c9 100644
--- a/test/integration/test-position-observer.js
+++ b/test/integration/test-position-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {poll} from '#testing/iframe';
 
 //TODO(aghassemi,#10878): Run in all platforms.
diff --git a/test/integration/test-released.js b/test/integration/test-released.js
index 73224d9c80e4..f4e55b0f873d 100644
--- a/test/integration/test-released.js
+++ b/test/integration/test-released.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   createFixtureIframe,
   expectBodyToBecomeVisible,
diff --git a/test/integration/test-shadow-amp.js b/test/integration/test-shadow-amp.js
index 6726e8380a2d..ec9fabfcb1cb 100644
--- a/test/integration/test-shadow-amp.js
+++ b/test/integration/test-shadow-amp.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {BrowserController} from '#testing/test-helper';
 
 describes.integration(
diff --git a/test/integration/test-shadow-dom-element.js b/test/integration/test-shadow-dom-element.js
index c41a31bd9cd2..a6683a993d2b 100644
--- a/test/integration/test-shadow-dom-element.js
+++ b/test/integration/test-shadow-dom-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {whenUpgradedToCustomElement} from '#core/dom/amp-element-helpers';
 
 import {toggleExperiment} from '#experiments';
diff --git a/test/integration/test-toggle-display.js b/test/integration/test-toggle-display.js
index 3f70a58cd38e..d2b408867a0a 100644
--- a/test/integration/test-toggle-display.js
+++ b/test/integration/test-toggle-display.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {setInitialDisplay, toggle} from '#core/dom/style';
 
 import {BrowserController} from '#testing/test-helper';
diff --git a/test/integration/test-user-error-reporting.js b/test/integration/test-user-error-reporting.js
index 29e7626ac8ad..8393eb6d006a 100644
--- a/test/integration/test-user-error-reporting.js
+++ b/test/integration/test-user-error-reporting.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BrowserController, RequestBank} from '#testing/test-helper';
 
 // TODO(zhouyx, #11459): Unskip the test on Safari and Firefox.
diff --git a/test/integration/test-video-manager.js b/test/integration/test-video-manager.js
index 5a4040003d5f..f425336e9468 100644
--- a/test/integration/test-video-manager.js
+++ b/test/integration/test-video-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dispatchCustomEvent, waitForChildPromise} from '#core/dom';
 import {isLayoutSizeDefined} from '#core/dom/layout';
 import {isAutoplaySupported, resetIsAutoplaySupported} from '#core/dom/video';
diff --git a/test/integration/test-video-players-helper.js b/test/integration/test-video-players-helper.js
index b4218c288fb5..3919cf0eedeb 100644
--- a/test/integration/test-video-players-helper.js
+++ b/test/integration/test-video-players-helper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeElement} from '#core/dom';
 import {detectIsAutoplaySupported} from '#core/dom/video';
 
diff --git a/test/integration/test-video-players.js b/test/integration/test-video-players.js
index 10ac6e13c228..3244474d8a0e 100644
--- a/test/integration/test-video-players.js
+++ b/test/integration/test-video-players.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Runs the video manager integration test suite against a video player that
  * implements the video interface (@see ../../src/video-interface.js)
diff --git a/test/integration/test-visibility-states.js b/test/integration/test-visibility-states.js
index 7211e2ff1cc4..3040311e89c6 100644
--- a/test/integration/test-visibility-states.js
+++ b/test/integration/test-visibility-states.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {VisibilityState} from '#core/constants/visibility-state';
 import {whenUpgradedToCustomElement} from '#core/dom/amp-element-helpers';
 import {getVendorJsPropertyName} from '#core/dom/style';
diff --git a/test/manual/test-sw.js b/test/manual/test-sw.js
index 1aef0423c2ca..e59bbb631d30 100644
--- a/test/manual/test-sw.js
+++ b/test/manual/test-sw.js
@@ -1,17 +1 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 console./*OK*/ info('ServiceWorker loaded.');
diff --git a/test/unit/3p/test-3p-frame.js b/test/unit/3p/test-3p-frame.js
index a34e5d5cab72..dd97333ac735 100644
--- a/test/unit/3p/test-3p-frame.js
+++ b/test/unit/3p/test-3p-frame.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {deserializeMessage, serializeMessage} from '#core/3p-frame-messaging';
 import {DomFingerprint} from '#core/dom/fingerprint';
 import * as mode from '#core/mode';
diff --git a/test/unit/3p/test-3p-messaging.js b/test/unit/3p/test-3p-messaging.js
index 8042e505c344..2c304b1d20ac 100644
--- a/test/unit/3p/test-3p-messaging.js
+++ b/test/unit/3p/test-3p-messaging.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /* eslint-disable import/no-deprecated */
 
 import {listenParent} from '#3p/messaging';
diff --git a/test/unit/3p/test-ampcontext-integration.js b/test/unit/3p/test-ampcontext-integration.js
index ea3366127582..084d80e2b175 100644
--- a/test/unit/3p/test-ampcontext-integration.js
+++ b/test/unit/3p/test-ampcontext-integration.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {masterSelection} from '#3p/ampcontext-integration';
 
 describes.fakeWin('#masterSelect', {}, (env) => {
diff --git a/test/unit/3p/test-recaptcha.js b/test/unit/3p/test-recaptcha.js
index 24d8f1cec845..5ffed3833adc 100644
--- a/test/unit/3p/test-recaptcha.js
+++ b/test/unit/3p/test-recaptcha.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {doesOriginDomainMatchIframeSrc, initRecaptcha} from '#3p/recaptcha';
 
 import {urls} from '../../../src/config';
diff --git a/test/unit/ads/test-adplugg.js b/test/unit/ads/test-adplugg.js
index c4531acb2047..84fba4e1c7a7 100644
--- a/test/unit/ads/test-adplugg.js
+++ b/test/unit/ads/test-adplugg.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {adplugg} from '#ads/vendors/adplugg';
 
 import {createIframePromise} from '#testing/iframe';
diff --git a/test/unit/ads/test-aduptech.js b/test/unit/ads/test-aduptech.js
index 9f2e1ca33df8..15835e08db5b 100644
--- a/test/unit/ads/test-aduptech.js
+++ b/test/unit/ads/test-aduptech.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import * as _3p from '#3p/3p';
 
 import {
diff --git a/test/unit/ads/test-csa.js b/test/unit/ads/test-csa.js
index 5758a2be869b..7614645da6b6 100644
--- a/test/unit/ads/test-csa.js
+++ b/test/unit/ads/test-csa.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as _3p from '#3p/3p';
 
 import {
diff --git a/test/unit/ads/test-pubmine.js b/test/unit/ads/test-pubmine.js
index 4d4e9ba973ce..2ffe166f7854 100644
--- a/test/unit/ads/test-pubmine.js
+++ b/test/unit/ads/test-pubmine.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {pubmine} from '#ads/vendors/pubmine';
 
 describes.fakeWin('pubmine', {}, (env) => {
diff --git a/test/unit/ads/test-ssp.js b/test/unit/ads/test-ssp.js
index 5c28c20ec768..3c8bf6a0e9db 100644
--- a/test/unit/ads/test-ssp.js
+++ b/test/unit/ads/test-ssp.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as _3p from '#3p/3p';
 
 import {
diff --git a/test/unit/ads/test-unruly.js b/test/unit/ads/test-unruly.js
index 85440389b2a0..915d058c17a1 100644
--- a/test/unit/ads/test-unruly.js
+++ b/test/unit/ads/test-unruly.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {unruly} from '#ads/vendors/unruly';
 
 describes.sandboxed('unruly', {}, () => {
diff --git a/test/unit/builtins/test-amp-img-v1.js b/test/unit/builtins/test-amp-img-v1.js
index d76625d6ad49..5bb475bc3075 100644
--- a/test/unit/builtins/test-amp-img-v1.js
+++ b/test/unit/builtins/test-amp-img-v1.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpImg} from '#builtins/amp-img/amp-img';
 
 import {createElementWithAttributes, dispatchCustomEvent} from '#core/dom';
diff --git a/test/unit/builtins/test-amp-img.js b/test/unit/builtins/test-amp-img.js
index 27e848f61da2..cf8a84a7dffa 100644
--- a/test/unit/builtins/test-amp-img.js
+++ b/test/unit/builtins/test-amp-img.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   ATTRIBUTES_TO_PROPAGATE,
   AmpImg,
diff --git a/test/unit/builtins/test-amp-layout.js b/test/unit/builtins/test-amp-layout.js
index 36e3172411c6..93fad5c9eb94 100644
--- a/test/unit/builtins/test-amp-layout.js
+++ b/test/unit/builtins/test-amp-layout.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpLayout, buildDom} from '#builtins/amp-layout/amp-layout';
 
 import {createElementWithAttributes} from '#core/dom';
diff --git a/test/unit/builtins/test-amp-pixel.js b/test/unit/builtins/test-amp-pixel.js
index 8ece090240d3..c7330d143838 100644
--- a/test/unit/builtins/test-amp-pixel.js
+++ b/test/unit/builtins/test-amp-pixel.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {installUrlReplacementsForEmbed} from '#service/url-replacements-impl';
 import {VariableSource} from '#service/variable-source';
 
diff --git a/test/unit/compiler/test-builders.js b/test/unit/compiler/test-builders.js
index 344e192f2a24..64febb5ac35d 100644
--- a/test/unit/compiler/test-builders.js
+++ b/test/unit/compiler/test-builders.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {getBuilders} from '#compiler/builders';
 
 describes.sandboxed('getBuilders', {}, () => {
diff --git a/test/unit/core/3p/test-iframe-messaging-client.js b/test/unit/core/3p/test-iframe-messaging-client.js
index 2240b520b95c..3009dc471b86 100644
--- a/test/unit/core/3p/test-iframe-messaging-client.js
+++ b/test/unit/core/3p/test-iframe-messaging-client.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {IframeMessagingClient} from '#3p/iframe-messaging-client';
 
 import {serializeMessage} from '#core/3p-frame-messaging';
diff --git a/test/unit/core/context/test-node-discover.js b/test/unit/core/context/test-node-discover.js
index 163a6b40423c..71147679e045 100644
--- a/test/unit/core/context/test-node-discover.js
+++ b/test/unit/core/context/test-node-discover.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ContextNode} from '#core/context/node';
 import {deepScan, findParent} from '#core/context/scan';
 import {domOrderComparator} from '#core/dom';
diff --git a/test/unit/core/context/test-node-subscribers.js b/test/unit/core/context/test-node-subscribers.js
index 6fe7d26ca217..65c4193652ae 100644
--- a/test/unit/core/context/test-node-subscribers.js
+++ b/test/unit/core/context/test-node-subscribers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ContextNode} from '#core/context/node';
 import {contextProp} from '#core/context/prop';
 import {subscribe, unsubscribe} from '#core/context/subscriber';
diff --git a/test/unit/core/context/test-node-values.js b/test/unit/core/context/test-node-values.js
index 54155a50bcd2..64f7d0d09c80 100644
--- a/test/unit/core/context/test-node-values.js
+++ b/test/unit/core/context/test-node-values.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ContextNode} from '#core/context/node';
 import {contextProp} from '#core/context/prop';
 import {Values} from '#core/context/values';
diff --git a/test/unit/core/data-structures/test-curve.js b/test/unit/core/data-structures/test-curve.js
index 270f3f1cc445..6a2bc78a1252 100644
--- a/test/unit/core/data-structures/test-curve.js
+++ b/test/unit/core/data-structures/test-curve.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Curves, bezierCurve, getCurve} from '#core/data-structures/curve';
 
 describes.sandboxed('data structures - Curve', {}, () => {
diff --git a/test/unit/core/data-structures/test-dom-based-weakref.js b/test/unit/core/data-structures/test-dom-based-weakref.js
index 967c3e714714..eb8a8694de4d 100644
--- a/test/unit/core/data-structures/test-dom-based-weakref.js
+++ b/test/unit/core/data-structures/test-dom-based-weakref.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {DomBasedWeakRef} from '#core/data-structures/dom-based-weakref';
 
 describes.realWin('data structures - DOM-based weakref', {}, (env) => {
diff --git a/test/unit/core/data-structures/test-finite-state-machine.js b/test/unit/core/data-structures/test-finite-state-machine.js
index bb884cd60fc7..99644a7ac64f 100644
--- a/test/unit/core/data-structures/test-finite-state-machine.js
+++ b/test/unit/core/data-structures/test-finite-state-machine.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {FiniteStateMachine} from '#core/data-structures/finite-state-machine';
 
 describes.sandboxed('data structures - Finite State Machine', {}, (env) => {
diff --git a/test/unit/core/data-structures/test-lru-cache.js b/test/unit/core/data-structures/test-lru-cache.js
index 98e9c83046ed..2634a872fef3 100644
--- a/test/unit/core/data-structures/test-lru-cache.js
+++ b/test/unit/core/data-structures/test-lru-cache.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {LruCache} from '#core/data-structures/lru-cache';
 
 describes.sandboxed('data structures - LruCache', {}, () => {
diff --git a/test/unit/core/data-structures/test-observable.js b/test/unit/core/data-structures/test-observable.js
index fafcbff17450..22d7cadfcc52 100644
--- a/test/unit/core/data-structures/test-observable.js
+++ b/test/unit/core/data-structures/test-observable.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Observable} from '#core/data-structures/observable';
 
 describes.sandboxed('data structures - Observable', {}, () => {
diff --git a/test/unit/core/data-structures/test-priority-queue.js b/test/unit/core/data-structures/test-priority-queue.js
index 97558b6c71f8..aa1c81745af5 100644
--- a/test/unit/core/data-structures/test-priority-queue.js
+++ b/test/unit/core/data-structures/test-priority-queue.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {PriorityQueue} from '#core/data-structures/priority-queue';
 
 describes.sandboxed('data structures - PriorityQueue', {}, (env) => {
diff --git a/test/unit/core/data-structures/test-promise.js b/test/unit/core/data-structures/test-promise.js
index 893a554b94bd..9af74b3a8516 100644
--- a/test/unit/core/data-structures/test-promise.js
+++ b/test/unit/core/data-structures/test-promise.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred, LastAddedResolver} from '#core/data-structures/promise';
 
 describes.sandboxed('data structures - PromiseUtils', {}, () => {
diff --git a/test/unit/core/data-structures/test-signals.js b/test/unit/core/data-structures/test-signals.js
index a16235d328ca..8b015ddc3b68 100644
--- a/test/unit/core/data-structures/test-signals.js
+++ b/test/unit/core/data-structures/test-signals.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Signals} from '#core/data-structures/signals';
 
 describes.sandboxed('data structures - Signals', {}, (env) => {
diff --git a/test/unit/core/dom/layout/test-intersection-no-root.js b/test/unit/core/dom/layout/test-intersection-no-root.js
index eeaeec00854e..84de8e3e2e88 100644
--- a/test/unit/core/dom/layout/test-intersection-no-root.js
+++ b/test/unit/core/dom/layout/test-intersection-no-root.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {measureIntersectionNoRoot} from '#core/dom/layout/intersection-no-root';
 
 describes.fakeWin(
diff --git a/test/unit/core/dom/layout/test-intersection.js b/test/unit/core/dom/layout/test-intersection.js
index 9e5c0f051fd0..39e85f2f7b95 100644
--- a/test/unit/core/dom/layout/test-intersection.js
+++ b/test/unit/core/dom/layout/test-intersection.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   intersectionEntryToJson,
   measureIntersection,
diff --git a/test/unit/core/dom/layout/test-layout.js b/test/unit/core/dom/layout/test-layout.js
index 1000b841ddfa..06cb5fdc9be2 100644
--- a/test/unit/core/dom/layout/test-layout.js
+++ b/test/unit/core/dom/layout/test-layout.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   Layout,
   assertLength,
diff --git a/test/unit/core/dom/layout/test-rect.js b/test/unit/core/dom/layout/test-rect.js
index 2291e663cd3b..566d996e230b 100644
--- a/test/unit/core/dom/layout/test-rect.js
+++ b/test/unit/core/dom/layout/test-rect.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as lr from '#core/dom/layout/rect';
 
 describes.sandboxed('DOM - layout - LayoutRect', {}, () => {
diff --git a/test/unit/core/dom/layout/test-size-observer.js b/test/unit/core/dom/layout/test-size-observer.js
index 50f1f9f53751..496103cd69d1 100644
--- a/test/unit/core/dom/layout/test-size-observer.js
+++ b/test/unit/core/dom/layout/test-size-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {
   measureBorderBoxSize,
diff --git a/test/unit/core/dom/layout/test-viewport-observer.js b/test/unit/core/dom/layout/test-viewport-observer.js
index 8a3d10a4a014..0a865b01d823 100644
--- a/test/unit/core/dom/layout/test-viewport-observer.js
+++ b/test/unit/core/dom/layout/test-viewport-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   createViewportObserver,
   observeWithSharedInOb,
diff --git a/test/unit/core/dom/stream/test-detached.js b/test/unit/core/dom/stream/test-detached.js
index d934b2d6bf0a..3ad06fac5cb6 100644
--- a/test/unit/core/dom/stream/test-detached.js
+++ b/test/unit/core/dom/stream/test-detached.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {DetachedDomStream} from '#core/dom/stream';
 
 describes.fakeWin('DOM - stream - DetachedDomStream', {amp: true}, (env) => {
diff --git a/test/unit/core/dom/stream/test-response.js b/test/unit/core/dom/stream/test-response.js
index 7b3e7c6dbbf4..e53dd4272593 100644
--- a/test/unit/core/dom/stream/test-response.js
+++ b/test/unit/core/dom/stream/test-response.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {streamResponseToWriter} from '#core/dom/stream';
 
 import {macroTask} from '#testing/helpers';
diff --git a/test/unit/core/dom/test-css-selectors.js b/test/unit/core/dom/test-css-selectors.js
index 16fe28bf2d44..4120d2d5ac6b 100644
--- a/test/unit/core/dom/test-css-selectors.js
+++ b/test/unit/core/dom/test-css-selectors.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   escapeCssSelectorIdent,
   prependSelectorsWith,
diff --git a/test/unit/core/dom/test-dom.js b/test/unit/core/dom/test-dom.js
index bfd896e515c6..91a0ba375c30 100644
--- a/test/unit/core/dom/test-dom.js
+++ b/test/unit/core/dom/test-dom.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as dom from '#core/dom';
 import {setScopeSelectorSupportedForTesting} from '#core/dom/css-selectors';
 import {matches} from '#core/dom/query';
diff --git a/test/unit/core/dom/test-fingerprint.js b/test/unit/core/dom/test-fingerprint.js
index ba6ae7f4ed32..5eb0b4f00b3e 100644
--- a/test/unit/core/dom/test-fingerprint.js
+++ b/test/unit/core/dom/test-fingerprint.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {DomFingerprint, domFingerprintPlain} from '#core/dom/fingerprint';
 
 describes.realWin('DOM - fingerprint', {}, (env) => {
diff --git a/test/unit/core/dom/test-get-html.js b/test/unit/core/dom/test-get-html.js
index 9a03347a0124..0e0ef311837f 100644
--- a/test/unit/core/dom/test-get-html.js
+++ b/test/unit/core/dom/test-get-html.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getHtml} from '#core/dom/get-html';
 
 const template = `<div id="wrapper">
diff --git a/test/unit/core/dom/test-media-query-props.js b/test/unit/core/dom/test-media-query-props.js
index 1bcdd440e088..2acadbbca1f3 100644
--- a/test/unit/core/dom/test-media-query-props.js
+++ b/test/unit/core/dom/test-media-query-props.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {MediaQueryProps} from '#core/dom/media-query-props';
 
 import {waitFor} from '#testing/test-helper';
diff --git a/test/unit/core/dom/test-parse-date-attributes.js b/test/unit/core/dom/test-parse-date-attributes.js
index a28f6cba6d57..b928491c1a7a 100644
--- a/test/unit/core/dom/test-parse-date-attributes.js
+++ b/test/unit/core/dom/test-parse-date-attributes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseDateAttrs as parseDateAttrsBase} from '#core/dom/parse-date-attributes';
 
 describes.sandboxed('DOM - parse date attributes', {}, (env) => {
diff --git a/test/unit/core/dom/test-propagate-attributes.js b/test/unit/core/dom/test-propagate-attributes.js
index c290537bc507..5464f97cac4b 100644
--- a/test/unit/core/dom/test-propagate-attributes.js
+++ b/test/unit/core/dom/test-propagate-attributes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {propagateAttributes} from '#core/dom/propagate-attributes';
 
 class FakeElement {
diff --git a/test/unit/core/dom/test-query.js b/test/unit/core/dom/test-query.js
index bc88380ff2f9..143127868902 100644
--- a/test/unit/core/dom/test-query.js
+++ b/test/unit/core/dom/test-query.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes} from '#core/dom';
 import {setScopeSelectorSupportedForTesting} from '#core/dom/css-selectors';
 import * as query from '#core/dom/query';
diff --git a/test/unit/core/dom/test-resource-container-helper.js b/test/unit/core/dom/test-resource-container-helper.js
index fa7af1397437..435d5c989e2c 100644
--- a/test/unit/core/dom/test-resource-container-helper.js
+++ b/test/unit/core/dom/test-resource-container-helper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   forAllWithin,
   loadAll,
diff --git a/test/unit/core/dom/test-srcset.js b/test/unit/core/dom/test-srcset.js
index b99ac3ccd36b..6e8b67af21e2 100644
--- a/test/unit/core/dom/test-srcset.js
+++ b/test/unit/core/dom/test-srcset.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   Srcset,
   parseSrcset,
diff --git a/test/unit/core/dom/test-static-template.js b/test/unit/core/dom/test-static-template.js
index f0a6936d9d19..359dd61205b6 100644
--- a/test/unit/core/dom/test-static-template.js
+++ b/test/unit/core/dom/test-static-template.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {htmlFor, htmlRefs} from '#core/dom/static-template';
 
 describes.sandboxed('DOM - Static Template', {}, () => {
diff --git a/test/unit/core/dom/test-style.js b/test/unit/core/dom/test-style.js
index f58b263153fe..5b5d6fb7c290 100644
--- a/test/unit/core/dom/test-style.js
+++ b/test/unit/core/dom/test-style.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as st from '#core/dom/style';
 
 describes.sandboxed('DOM - style helpers', {}, (env) => {
diff --git a/test/unit/core/dom/test-transition.js b/test/unit/core/dom/test-transition.js
index 83af7e775941..c4d437c757ee 100644
--- a/test/unit/core/dom/test-transition.js
+++ b/test/unit/core/dom/test-transition.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   concat,
   numeric,
diff --git a/test/unit/core/dom/test-web-components.js b/test/unit/core/dom/test-web-components.js
index ab2cfe126017..b96341170ac5 100644
--- a/test/unit/core/dom/test-web-components.js
+++ b/test/unit/core/dom/test-web-components.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   ShadowDomVersion,
   getShadowDomSupportedVersion,
diff --git a/test/unit/core/dom/video/test-pause-helper.js b/test/unit/core/dom/video/test-pause-helper.js
index 16edbe6adabe..71de2f4bd04e 100644
--- a/test/unit/core/dom/video/test-pause-helper.js
+++ b/test/unit/core/dom/video/test-pause-helper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {PauseHelper} from '#core/dom/video/pause-helper';
 
 import {installResizeObserverStub} from '#testing/resize-observer-stub';
diff --git a/test/unit/core/test-assert.js b/test/unit/core/test-assert.js
index 4adce44a01c8..ddabca75ed08 100644
--- a/test/unit/core/test-assert.js
+++ b/test/unit/core/test-assert.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {devAssert, userAssert} from '#core/assert';
 import {USER_ERROR_SENTINEL} from '#core/error/message-helpers';
 
diff --git a/test/unit/core/test-document-ready.js b/test/unit/core/test-document-ready.js
index 34573a7844b1..16c2784d16fa 100644
--- a/test/unit/core/test-document-ready.js
+++ b/test/unit/core/test-document-ready.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   isDocumentReady,
   onDocumentReady,
diff --git a/test/unit/core/test-document-visibility.js b/test/unit/core/test-document-visibility.js
index 33e361e1a4ed..f9a91db2d51b 100644
--- a/test/unit/core/test-document-visibility.js
+++ b/test/unit/core/test-document-visibility.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   addDocumentVisibilityChangeListener,
   getDocumentVisibilityState,
diff --git a/test/unit/core/test-error.js b/test/unit/core/test-error.js
index a81a13d4b781..70325ac2b637 100644
--- a/test/unit/core/test-error.js
+++ b/test/unit/core/test-error.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   devError,
   devExpectedError,
diff --git a/test/unit/core/test-math.js b/test/unit/core/test-math.js
index 616543ff03d1..cfacd08e0683 100644
--- a/test/unit/core/test-math.js
+++ b/test/unit/core/test-math.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   boundValue,
   clamp,
diff --git a/test/unit/core/types/function/test-exponential-backoff.js b/test/unit/core/types/function/test-exponential-backoff.js
index 7ba535db259b..e522c47e9eac 100644
--- a/test/unit/core/types/function/test-exponential-backoff.js
+++ b/test/unit/core/types/function/test-exponential-backoff.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   exponentialBackoff,
   exponentialBackoffClock,
diff --git a/test/unit/core/types/function/test-function.js b/test/unit/core/types/function/test-function.js
index e9afedf0db1e..defed0695879 100644
--- a/test/unit/core/types/function/test-function.js
+++ b/test/unit/core/types/function/test-function.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {debounce, throttle} from '#core/types/function';
 
 describes.sandboxed('type helpers - functions', {}, (env) => {
diff --git a/test/unit/core/types/object/test-json.js b/test/unit/core/types/object/test-json.js
index 53475895f3d4..8ade6c96a6f2 100644
--- a/test/unit/core/types/object/test-json.js
+++ b/test/unit/core/types/object/test-json.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {deepEquals, tryParseJson} from '#core/types/object/json';
 
 describes.sandboxed('type helpers - objects - json', {}, () => {
diff --git a/test/unit/core/types/object/test-object.js b/test/unit/core/types/object/test-object.js
index 2fb654d77fb5..9600492bab54 100644
--- a/test/unit/core/types/object/test-object.js
+++ b/test/unit/core/types/object/test-object.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   deepMerge,
   getValueForExpr,
diff --git a/test/unit/core/types/string/test-base64.js b/test/unit/core/types/string/test-base64.js
index 6bf41327bdfc..fd15d7175290 100644
--- a/test/unit/core/types/string/test-base64.js
+++ b/test/unit/core/types/string/test-base64.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   base64DecodeToBytes,
   base64EncodeFromBytes,
diff --git a/test/unit/core/types/string/test-bytes.js b/test/unit/core/types/string/test-bytes.js
index bfcf982097ca..57196dc2c177 100644
--- a/test/unit/core/types/string/test-bytes.js
+++ b/test/unit/core/types/string/test-bytes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   bytesToString,
   bytesToUInt32,
diff --git a/test/unit/core/types/string/test-string.js b/test/unit/core/types/string/test-string.js
index fdaa9f2f9034..6387c4ffc72b 100644
--- a/test/unit/core/types/string/test-string.js
+++ b/test/unit/core/types/string/test-string.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   asyncStringReplace,
   camelCaseToDash,
diff --git a/test/unit/core/types/string/test-url.js b/test/unit/core/types/string/test-url.js
index 1300f586a42d..5926312b3193 100644
--- a/test/unit/core/types/string/test-url.js
+++ b/test/unit/core/types/string/test-url.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getHashParams, parseQueryString} from '#core/types/string/url';
 
 describes.sandboxed('type helpers - strings - urls', {}, () => {
diff --git a/test/unit/core/types/test-array.js b/test/unit/core/types/test-array.js
index 9bae8baa3208..8cd56928eb27 100644
--- a/test/unit/core/types/test-array.js
+++ b/test/unit/core/types/test-array.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   areEqualOrdered,
   arrayOrSingleItemToArray,
diff --git a/test/unit/core/types/test-date.js b/test/unit/core/types/test-date.js
index 6a9e02c118de..c6eebb4c5027 100644
--- a/test/unit/core/types/test-date.js
+++ b/test/unit/core/types/test-date.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getDate, parseDate} from '#core/types/date';
 
 describes.sandboxed('type helpers - dates', {}, (env) => {
diff --git a/test/unit/core/types/test-enum.js b/test/unit/core/types/test-enum.js
index dff4a1e0897b..5530191b1f61 100644
--- a/test/unit/core/types/test-enum.js
+++ b/test/unit/core/types/test-enum.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {isEnumValue} from '#core/types/enum';
 
 describes.sandboxed('type helpers - enums', {}, () => {
diff --git a/test/unit/core/types/test-types.js b/test/unit/core/types/test-types.js
index 4afe89256410..6425997fe28a 100644
--- a/test/unit/core/types/test-types.js
+++ b/test/unit/core/types/test-types.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {isFiniteNumber} from '#core/types';
 
 describes.sandboxed('type helpers', {}, () => {
diff --git a/test/unit/core/window/test-history.js b/test/unit/core/window/test-history.js
index ce0acb4b60d4..291562d63974 100644
--- a/test/unit/core/window/test-history.js
+++ b/test/unit/core/window/test-history.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {AmpDocSingle} from '#service/ampdoc-impl';
 import {
diff --git a/test/unit/inabox/test-inabox-frame-overlay-manager.js b/test/unit/inabox/test-inabox-frame-overlay-manager.js
index c581c5938ecb..004228f53ce9 100644
--- a/test/unit/inabox/test-inabox-frame-overlay-manager.js
+++ b/test/unit/inabox/test-inabox-frame-overlay-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   stubCollapseFrameForTesting,
   stubExpandFrameForTesting,
diff --git a/test/unit/inabox/test-inabox-host.js b/test/unit/inabox/test-inabox-host.js
index 1e21060304ee..b086e704ab2b 100644
--- a/test/unit/inabox/test-inabox-host.js
+++ b/test/unit/inabox/test-inabox-host.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {InaboxHost} from '#ads/inabox/inabox-host';
 import {InaboxMessagingHost} from '#ads/inabox/inabox-messaging-host';
 
diff --git a/test/unit/inabox/test-inabox-messaging-host.js b/test/unit/inabox/test-inabox-messaging-host.js
index 08e7432193d4..78e778b5410c 100644
--- a/test/unit/inabox/test-inabox-messaging-host.js
+++ b/test/unit/inabox/test-inabox-messaging-host.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {InaboxMessagingHost} from '#ads/inabox/inabox-messaging-host';
 
 import {deserializeMessage} from '#core/3p-frame-messaging';
diff --git a/test/unit/inabox/test-inabox-mutator.js b/test/unit/inabox/test-inabox-mutator.js
index 1b735f8debac..9743b3545a6f 100644
--- a/test/unit/inabox/test-inabox-mutator.js
+++ b/test/unit/inabox/test-inabox-mutator.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {InaboxMutator} from '#inabox/inabox-mutator';
 
 import {Services} from '#service';
diff --git a/test/unit/inabox/test-inabox-resources.js b/test/unit/inabox/test-inabox-resources.js
index 0bda9d77c389..ef8a166501d6 100644
--- a/test/unit/inabox/test-inabox-resources.js
+++ b/test/unit/inabox/test-inabox-resources.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Deferred} from '#core/data-structures/promise';
 
 import {toggleExperiment} from '#experiments';
diff --git a/test/unit/inabox/test-inabox-viewport.js b/test/unit/inabox/test-inabox-viewport.js
index d079b971c7f1..872015715e66 100644
--- a/test/unit/inabox/test-inabox-viewport.js
+++ b/test/unit/inabox/test-inabox-viewport.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {FrameOverlayManager} from '#ads/inabox/frame-overlay-manager';
 import {PositionObserver} from '#ads/inabox/position-observer';
 
diff --git a/test/unit/inabox/test-position-observer.js b/test/unit/inabox/test-position-observer.js
index d1e50592dc99..5c41a6326500 100644
--- a/test/unit/inabox/test-position-observer.js
+++ b/test/unit/inabox/test-position-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   PositionObserver,
   getPositionObserver,
diff --git a/test/unit/inabox/test-utils.js b/test/unit/inabox/test-utils.js
index b0a02dc08664..d394dcd4aaae 100644
--- a/test/unit/inabox/test-utils.js
+++ b/test/unit/inabox/test-utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {createElementWithAttributes} from '#core/dom';
 
diff --git a/test/unit/polyfills/test-abort-controller.js b/test/unit/polyfills/test-abort-controller.js
index 91055f45fef0..f72480dcf3b8 100644
--- a/test/unit/polyfills/test-abort-controller.js
+++ b/test/unit/polyfills/test-abort-controller.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {install} from '#polyfills/abort-controller';
 
 describes.realWin('AbortController', {}, (env) => {
diff --git a/test/unit/polyfills/test-array-includes.js b/test/unit/polyfills/test-array-includes.js
index bd3c06131683..f94513bbbeed 100644
--- a/test/unit/polyfills/test-array-includes.js
+++ b/test/unit/polyfills/test-array-includes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {install} from '#polyfills/array-includes';
 
 describes.fakeWin('Array.includes', {}, (env) => {
diff --git a/test/unit/polyfills/test-custom-elements.js b/test/unit/polyfills/test-custom-elements.js
index 19dcc2c5fa9d..8fa620c2b519 100644
--- a/test/unit/polyfills/test-custom-elements.js
+++ b/test/unit/polyfills/test-custom-elements.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {copyProperties, install} from '#polyfills/custom-elements';
 
 describes.realWin(
diff --git a/test/unit/polyfills/test-document-contains.js b/test/unit/polyfills/test-document-contains.js
index 823db28e55b3..4d24fce92341 100644
--- a/test/unit/polyfills/test-document-contains.js
+++ b/test/unit/polyfills/test-document-contains.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {install} from '#polyfills/document-contains';
 
 describes.sandboxed('HTMLDocument.contains', {}, () => {
diff --git a/test/unit/polyfills/test-domtokenlist-toggle.js b/test/unit/polyfills/test-domtokenlist-toggle.js
index 75c1575ebe8f..28f0d1cfc2a2 100644
--- a/test/unit/polyfills/test-domtokenlist-toggle.js
+++ b/test/unit/polyfills/test-domtokenlist-toggle.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {toArray} from '#core/types/array';
 
 import {install} from '#polyfills/domtokenlist';
diff --git a/test/unit/polyfills/test-intersection-observer.js b/test/unit/polyfills/test-intersection-observer.js
index e249c8dadbe6..44b7ecbb3ff1 100644
--- a/test/unit/polyfills/test-intersection-observer.js
+++ b/test/unit/polyfills/test-intersection-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {install, installForChildWin} from '#polyfills/intersection-observer';
 import {
   IntersectionObserverStub,
diff --git a/test/unit/polyfills/test-math-sign.js b/test/unit/polyfills/test-math-sign.js
index be1558e5c447..2cac10fb186e 100644
--- a/test/unit/polyfills/test-math-sign.js
+++ b/test/unit/polyfills/test-math-sign.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {sign} from '#polyfills/math-sign';
 
 describes.sandboxed('Math.sign', {}, () => {
diff --git a/test/unit/polyfills/test-object-assign.js b/test/unit/polyfills/test-object-assign.js
index d534669f3144..16112f5f0b75 100644
--- a/test/unit/polyfills/test-object-assign.js
+++ b/test/unit/polyfills/test-object-assign.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {assign} from '#polyfills/object-assign';
 
 describes.sandboxed('Object.assign', {}, () => {
diff --git a/test/unit/polyfills/test-object-values.js b/test/unit/polyfills/test-object-values.js
index 218a66eaf9d7..ac5ed271a80e 100644
--- a/test/unit/polyfills/test-object-values.js
+++ b/test/unit/polyfills/test-object-values.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {values} from '#polyfills/object-values';
 
 describes.sandboxed('Object.values', {}, () => {
diff --git a/test/unit/polyfills/test-resize-observer.js b/test/unit/polyfills/test-resize-observer.js
index fe2ee80152fc..e1b83186e4b2 100644
--- a/test/unit/polyfills/test-resize-observer.js
+++ b/test/unit/polyfills/test-resize-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {install, installForChildWin} from '#polyfills/resize-observer';
 import {
   ResizeObserverStub,
diff --git a/test/unit/preact/component/test-renderer.js b/test/unit/preact/component/test-renderer.js
index 0c24191c065a..a8f0c75c2a10 100644
--- a/test/unit/preact/component/test-renderer.js
+++ b/test/unit/preact/component/test-renderer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {mount} from 'enzyme';
 
 import * as Preact from '#preact';
diff --git a/test/unit/preact/test-base-element-mapping.js b/test/unit/preact/test-base-element-mapping.js
index 03ea7580b233..808eaf39feaf 100644
--- a/test/unit/preact/test-base-element-mapping.js
+++ b/test/unit/preact/test-base-element-mapping.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes} from '#core/dom';
 import {htmlFor} from '#core/dom/static-template';
 import {omit} from '#core/types/object';
diff --git a/test/unit/preact/test-base-element-runtime.js b/test/unit/preact/test-base-element-runtime.js
index 3fcc992c753c..a0a10ce3916c 100644
--- a/test/unit/preact/test-base-element-runtime.js
+++ b/test/unit/preact/test-base-element-runtime.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {subscribe} from '#core/context';
 import {removeElement} from '#core/dom';
 import {htmlFor} from '#core/dom/static-template';
diff --git a/test/unit/preact/test-context.js b/test/unit/preact/test-context.js
index ec51ff696a32..7bd89250c818 100644
--- a/test/unit/preact/test-context.js
+++ b/test/unit/preact/test-context.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {mount} from 'enzyme';
 
 import * as Preact from '#preact';
diff --git a/test/unit/preact/test-contextprops.js b/test/unit/preact/test-contextprops.js
index b48ce4ea8bc8..c7a223ff0d16 100644
--- a/test/unit/preact/test-contextprops.js
+++ b/test/unit/preact/test-contextprops.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CanPlay, CanRender, LoadingProp} from '#preact/contextprops';
 
 describes.sandboxed('contextprops - common props', {}, () => {
diff --git a/test/unit/preact/test-slot.js b/test/unit/preact/test-slot.js
index 8607e465a468..3b6585b1019f 100644
--- a/test/unit/preact/test-slot.js
+++ b/test/unit/preact/test-slot.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 import {mount} from 'enzyme';
 
diff --git a/test/unit/test-3p-environment.js b/test/unit/test-3p-environment.js
index 37cd3d88e7f0..339b211b9039 100644
--- a/test/unit/test-3p-environment.js
+++ b/test/unit/test-3p-environment.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {manageWin, setInViewportForTesting} from '#3p/environment';
diff --git a/test/unit/test-3p.js b/test/unit/test-3p.js
index 04b1f4491ccc..9c922443c9d2 100644
--- a/test/unit/test-3p.js
+++ b/test/unit/test-3p.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   computeInMasterFrame,
   loadScript,
diff --git a/test/unit/test-action.js b/test/unit/test-action.js
index 1e047890e688..b5748b5fa4f1 100644
--- a/test/unit/test-action.js
+++ b/test/unit/test-action.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   ActionTrust,
   DEFAULT_ACTION,
diff --git a/test/unit/test-activity.js b/test/unit/test-activity.js
index 922b7a8860b9..f993cd0a11c2 100644
--- a/test/unit/test-activity.js
+++ b/test/unit/test-activity.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Observable} from '#core/data-structures/observable';
 
 import {Services} from '#service';
diff --git a/test/unit/test-ad-cid.js b/test/unit/test-ad-cid.js
index 943aef7faaa1..7907f6c92b11 100644
--- a/test/unit/test-ad-cid.js
+++ b/test/unit/test-ad-cid.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {adConfig} from '#ads/_config';
diff --git a/test/unit/test-ad-helper.js b/test/unit/test-ad-helper.js
index b2b8df2eaa12..586c70b6a259 100644
--- a/test/unit/test-ad-helper.js
+++ b/test/unit/test-ad-helper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {computedStyle} from '#core/dom/style';
 
 import {createIframePromise} from '#testing/iframe';
diff --git a/test/unit/test-ads-config.js b/test/unit/test-ads-config.js
index 99cca4484c99..8217fa219e13 100644
--- a/test/unit/test-ads-config.js
+++ b/test/unit/test-ads-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {adConfig} from '#ads/_config';
 
 import {hasOwn} from '#core/types/object';
diff --git a/test/unit/test-alp-handler.js b/test/unit/test-alp-handler.js
index 432834a481a1..ac9e589a24b8 100644
--- a/test/unit/test-alp-handler.js
+++ b/test/unit/test-alp-handler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {handleClick, warmupDynamic, warmupStatic} from '#ads/alp/handler';
 
 import {parseUrlDeprecated} from '../../src/url';
diff --git a/test/unit/test-amp-context.js b/test/unit/test-amp-context.js
index 309496a6ba55..927e265ec03a 100644
--- a/test/unit/test-amp-context.js
+++ b/test/unit/test-amp-context.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {AmpContext} from '#3p/ampcontext';
 
 import {MessageType, serializeMessage} from '#core/3p-frame-messaging';
diff --git a/test/unit/test-amp-element-helpers.js b/test/unit/test-amp-element-helpers.js
index 5d4f1960c572..8c4e20cccd5d 100644
--- a/test/unit/test-amp-element-helpers.js
+++ b/test/unit/test-amp-element-helpers.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {whenUpgradedToCustomElement} from '#core/dom/amp-element-helpers';
 
 import {BaseElement} from '../../src/base-element';
diff --git a/test/unit/test-amp-img-intrinsic.js b/test/unit/test-amp-img-intrinsic.js
index 6a5ad5204223..6be6cf9d2e72 100644
--- a/test/unit/test-amp-img-intrinsic.js
+++ b/test/unit/test-amp-img-intrinsic.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {installImg} from '#builtins/amp-img/amp-img';
 
 import {createElementWithAttributes} from '#core/dom';
diff --git a/test/unit/test-amp-inabox.js b/test/unit/test-amp-inabox.js
index ac527d8f81eb..4e234a17a021 100644
--- a/test/unit/test-amp-inabox.js
+++ b/test/unit/test-amp-inabox.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {removeItem} from '#core/types/array';
 
 import {installAmpdocServicesForInabox} from '#inabox/inabox-services';
diff --git a/test/unit/test-amp-story-player-viewport-observer.js b/test/unit/test-amp-story-player-viewport-observer.js
index 4f011d272402..f210490e913f 100644
--- a/test/unit/test-amp-story-player-viewport-observer.js
+++ b/test/unit/test-amp-story-player-viewport-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpStoryPlayerViewportObserver} from '../../src/amp-story-player/amp-story-player-viewport-observer';
 
 describes.realWin('AmpStoryPlayerViewportObserver', {amp: false}, (env) => {
diff --git a/test/unit/test-amp-story-player.js b/test/unit/test-amp-story-player.js
index 21b4d5ba61ae..c772cf9b56f4 100644
--- a/test/unit/test-amp-story-player.js
+++ b/test/unit/test-amp-story-player.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Messaging} from '@ampproject/viewer-messaging';
 import {expect} from 'chai';
 
diff --git a/test/unit/test-ampdoc.js b/test/unit/test-ampdoc.js
index ce0a3e69d47a..34aaa5f19dbe 100644
--- a/test/unit/test-ampdoc.js
+++ b/test/unit/test-ampdoc.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Signals} from '#core/data-structures/signals';
 import * as docready from '#core/document-ready';
 import * as dom from '#core/dom';
diff --git a/test/unit/test-analytics.js b/test/unit/test-analytics.js
index 6b852f0c2b5d..3c175acbb0f6 100644
--- a/test/unit/test-analytics.js
+++ b/test/unit/test-analytics.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {triggerAnalyticsEvent} from '../../src/analytics';
diff --git a/test/unit/test-animation.js b/test/unit/test-animation.js
index b8daecf77467..0355d721058d 100644
--- a/test/unit/test-animation.js
+++ b/test/unit/test-animation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Animation} from '../../src/animation';
 
 describes.sandboxed('Animation', {}, (env) => {
diff --git a/test/unit/test-base-element.js b/test/unit/test-base-element.js
index 91bd10507aba..fcdd2a7c55cd 100644
--- a/test/unit/test-base-element.js
+++ b/test/unit/test-base-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {DEFAULT_ACTION} from '#core/constants/action-constants';
 import {LayoutPriority} from '#core/dom/layout';
 import {layoutRectLtwh} from '#core/dom/layout/rect';
diff --git a/test/unit/test-batched-json.js b/test/unit/test-batched-json.js
index 14c254a2c522..f16b17290662 100644
--- a/test/unit/test-batched-json.js
+++ b/test/unit/test-batched-json.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {UrlReplacementPolicy, batchFetchJsonFor} from '../../src/batched-json';
diff --git a/test/unit/test-batched-xhr.js b/test/unit/test-batched-xhr.js
index 838c0e6271c6..7d1ec3cc116f 100644
--- a/test/unit/test-batched-xhr.js
+++ b/test/unit/test-batched-xhr.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {batchedXhrServiceForTesting} from '#service/batched-xhr-impl';
 
diff --git a/test/unit/test-cache-cid-api.js b/test/unit/test-cache-cid-api.js
index e3f6ea9765e5..92090efe9351 100644
--- a/test/unit/test-cache-cid-api.js
+++ b/test/unit/test-cache-cid-api.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {CacheCidApi} from '#service/cache-cid-api';
diff --git a/test/unit/test-callout-vendors.js b/test/unit/test-callout-vendors.js
index ca1df8f9c14b..9efac064e961 100644
--- a/test/unit/test-callout-vendors.js
+++ b/test/unit/test-callout-vendors.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {RTC_VENDORS} from '#service/real-time-config/callout-vendors';
 
 import {isSecureUrlDeprecated} from '../../src/url';
diff --git a/test/unit/test-chunk.js b/test/unit/test-chunk.js
index 5b1833a99485..5e1c14a5a266 100644
--- a/test/unit/test-chunk.js
+++ b/test/unit/test-chunk.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {installDocService} from '#service/ampdoc-impl';
 
diff --git a/test/unit/test-cid-api.js b/test/unit/test-cid-api.js
index 9d61a8f1934a..db9a83bf691c 100644
--- a/test/unit/test-cid-api.js
+++ b/test/unit/test-cid-api.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {GoogleCidApi} from '#service/cid-api';
 
 import {mockWindowInterface, stubService} from '#testing/test-helper';
diff --git a/test/unit/test-cid.js b/test/unit/test-cid.js
index 904553a4006b..6296e97a4974 100644
--- a/test/unit/test-cid.js
+++ b/test/unit/test-cid.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {Services} from '#service';
diff --git a/test/unit/test-consent.js b/test/unit/test-consent.js
index 75cf335c3a8d..21e129a7d118 100644
--- a/test/unit/test-consent.js
+++ b/test/unit/test-consent.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {shouldBlockOnConsentByMeta} from '../../src/consent';
 
 describes.fakeWin('consent', {amp: true}, (env) => {
diff --git a/test/unit/test-cookies.js b/test/unit/test-cookies.js
index 73f9a019cf33..c9585cb7fe49 100644
--- a/test/unit/test-cookies.js
+++ b/test/unit/test-cookies.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {BASE_CID_MAX_AGE_MILLIS} from '#service/cid-impl';
diff --git a/test/unit/test-crypto.js b/test/unit/test-crypto.js
index ec14fe2f6fe0..9fed50b043b0 100644
--- a/test/unit/test-crypto.js
+++ b/test/unit/test-crypto.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {installDocService} from '#service/ampdoc-impl';
 import {Crypto} from '#service/crypto-impl';
diff --git a/test/unit/test-custom-element-registry.js b/test/unit/test-custom-element-registry.js
index acab095028d1..97fca1f79bd4 100644
--- a/test/unit/test-custom-element-registry.js
+++ b/test/unit/test-custom-element-registry.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes} from '#core/dom';
 
 import {Services} from '#service';
diff --git a/test/unit/test-custom-element-v1.js b/test/unit/test-custom-element-v1.js
index 821b3442dc38..18b8349ce796 100644
--- a/test/unit/test-custom-element-v1.js
+++ b/test/unit/test-custom-element-v1.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {CommonSignals} from '#core/constants/common-signals';
 import {LayoutPriority} from '#core/dom/layout';
 
diff --git a/test/unit/test-custom-element.js b/test/unit/test-custom-element.js
index 8eff447c8b2e..6954dd6972ae 100644
--- a/test/unit/test-custom-element.js
+++ b/test/unit/test-custom-element.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {AmpEvents} from '#core/constants/amp-events';
diff --git a/test/unit/test-describes.js b/test/unit/test-describes.js
index 344db0629374..dba06ce0b762 100644
--- a/test/unit/test-describes.js
+++ b/test/unit/test-describes.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Test `fetch-mock` integration in describes.
 describes.sandboxed('fetch-mock', {}, () => {
   /** @param {!Object} env */
diff --git a/test/unit/test-document-info.js b/test/unit/test-document-info.js
index 693b49ac2df6..5e248fc69958 100644
--- a/test/unit/test-document-info.js
+++ b/test/unit/test-document-info.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {installDocService} from '#service/ampdoc-impl';
 import * as CID from '#service/cid-impl';
diff --git a/test/unit/test-document-submit.js b/test/unit/test-document-submit.js
index 9e30add07b2e..28b3f323d8d8 100644
--- a/test/unit/test-document-submit.js
+++ b/test/unit/test-document-submit.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {
diff --git a/test/unit/test-element-service.js b/test/unit/test-element-service.js
index e62993707949..c48ebb1feee6 100644
--- a/test/unit/test-element-service.js
+++ b/test/unit/test-element-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {createElementWithAttributes} from '#core/dom';
diff --git a/test/unit/test-error-reporting.js b/test/unit/test-error-reporting.js
index a658e86fb964..0950d859ecdf 100644
--- a/test/unit/test-error-reporting.js
+++ b/test/unit/test-error-reporting.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {resetExperimentTogglesForTesting, toggleExperiment} from '#experiments';
 
 import {Services} from '#service';
diff --git a/test/unit/test-event-helper.js b/test/unit/test-event-helper.js
index 6ce3a420b6b2..2d2278ccb24f 100644
--- a/test/unit/test-event-helper.js
+++ b/test/unit/test-event-helper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Observable} from '#core/data-structures/observable';
 import {
   detectEvtListenerOptsSupport,
diff --git a/test/unit/test-experiments.js b/test/unit/test-experiments.js
index b3f739bd37f9..12e3f01942d6 100644
--- a/test/unit/test-experiments.js
+++ b/test/unit/test-experiments.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes} from '#core/dom';
 
 import {
diff --git a/test/unit/test-extension-analytics.js b/test/unit/test-extension-analytics.js
index 1d11c054b04d..82595bf7d266 100644
--- a/test/unit/test-extension-analytics.js
+++ b/test/unit/test-extension-analytics.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {registerElement} from '#service/custom-element-registry';
 
diff --git a/test/unit/test-extension-script.js b/test/unit/test-extension-script.js
index 66f0ba4e5d93..43835fcec4db 100644
--- a/test/unit/test-extension-script.js
+++ b/test/unit/test-extension-script.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes} from '#core/dom';
 
 import {
diff --git a/test/unit/test-extensions.js b/test/unit/test-extensions.js
index ca6b3d6b3766..4d550be7fc42 100644
--- a/test/unit/test-extensions.js
+++ b/test/unit/test-extensions.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dispatchCustomEvent} from '#core/dom';
 
 import {Services} from '#service';
diff --git a/test/unit/test-fixed-layer.js b/test/unit/test-fixed-layer.js
index c7ed3147e8be..9d89963370e1 100644
--- a/test/unit/test-fixed-layer.js
+++ b/test/unit/test-fixed-layer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {toggle} from '#core/dom/style';
 import {endsWith} from '#core/types/string';
 
diff --git a/test/unit/test-focus-history.js b/test/unit/test-focus-history.js
index 20c00cc32f50..38f3bdee5d9f 100644
--- a/test/unit/test-focus-history.js
+++ b/test/unit/test-focus-history.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {installTimerService} from '#service/timer-impl';
 
 import {FocusHistory} from '../../src/focus-history';
diff --git a/test/unit/test-font-stylesheet-timeout.js b/test/unit/test-font-stylesheet-timeout.js
index 2b1ce27b3861..3c5257df8f6b 100644
--- a/test/unit/test-font-stylesheet-timeout.js
+++ b/test/unit/test-font-stylesheet-timeout.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {fontStylesheetTimeout} from '../../src/font-stylesheet-timeout';
 
 describes.realWin(
diff --git a/test/unit/test-form-data-wrapper.js b/test/unit/test-form-data-wrapper.js
index bdfd4ef61382..229210a15855 100644
--- a/test/unit/test-form-data-wrapper.js
+++ b/test/unit/test-form-data-wrapper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {fromIterator} from '#core/types/array';
 
 import {Services} from '#service';
diff --git a/test/unit/test-form.js b/test/unit/test-form.js
index 4bab8ba99a74..1ae8326ed4b7 100644
--- a/test/unit/test-form.js
+++ b/test/unit/test-form.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   getFormAsObject,
   isDisabled,
diff --git a/test/unit/test-friendly-iframe-embed.js b/test/unit/test-friendly-iframe-embed.js
index d0463d4bcd16..116203407ef6 100644
--- a/test/unit/test-friendly-iframe-embed.js
+++ b/test/unit/test-friendly-iframe-embed.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {Signals} from '#core/data-structures/signals';
 import {layoutRectLtwh} from '#core/dom/layout/rect';
diff --git a/test/unit/test-gesture-recognizers.js b/test/unit/test-gesture-recognizers.js
index 2ee238840e58..3ae2f1b901f5 100644
--- a/test/unit/test-gesture-recognizers.js
+++ b/test/unit/test-gesture-recognizers.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Gestures} from '../../src/gesture';
 import {
   DoubletapRecognizer,
diff --git a/test/unit/test-gesture.js b/test/unit/test-gesture.js
index f3bfd86c33a3..c694b03db4a8 100644
--- a/test/unit/test-gesture.js
+++ b/test/unit/test-gesture.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {GestureRecognizer, Gestures} from '../../src/gesture';
 
 describes.sandboxed('Gestures', {}, (env) => {
diff --git a/test/unit/test-hidden-observer.js b/test/unit/test-hidden-observer.js
index 0fa3939e7f50..3bc18472d8d5 100644
--- a/test/unit/test-hidden-observer.js
+++ b/test/unit/test-hidden-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {FakeMutationObserver} from '#testing/fake-dom';
diff --git a/test/unit/test-ie-media-bug.js b/test/unit/test-ie-media-bug.js
index 8e2ca30cb3a1..31ed18a5355c 100644
--- a/test/unit/test-ie-media-bug.js
+++ b/test/unit/test-ie-media-bug.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {ieMediaCheckAndFix} from '#service/ie-media-bug';
 
 import {dev} from '../../src/log';
diff --git a/test/unit/test-iframe-helper.js b/test/unit/test-iframe-helper.js
index 48acd4d73fdf..0fe0aa2fcca0 100644
--- a/test/unit/test-iframe-helper.js
+++ b/test/unit/test-iframe-helper.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {createIframePromise} from '#testing/iframe';
 
 import {generateSentinel} from '../../src/3p-frame';
diff --git a/test/unit/test-iframe-stub.js b/test/unit/test-iframe-stub.js
index 54555f076bf8..3fc097e9afdf 100644
--- a/test/unit/test-iframe-stub.js
+++ b/test/unit/test-iframe-stub.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createIframeWithMessageStub, expectPostMessage} from '#testing/iframe';
 
 describes.sandboxed
diff --git a/test/unit/test-impression.js b/test/unit/test-impression.js
index 2cc2e1400ed6..32753c0dc74f 100644
--- a/test/unit/test-impression.js
+++ b/test/unit/test-impression.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {WindowInterface} from '#core/window/interface';
diff --git a/test/unit/test-ini-load.js b/test/unit/test-ini-load.js
index b5544019f232..bb54afebe95a 100644
--- a/test/unit/test-ini-load.js
+++ b/test/unit/test-ini-load.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {removeItem} from '#core/types/array';
 
diff --git a/test/unit/test-input.js b/test/unit/test-input.js
index 7a9e1d90cdbb..7fd447e9088d 100644
--- a/test/unit/test-input.js
+++ b/test/unit/test-input.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {installTimerService} from '#service/timer-impl';
 
 import {stubService} from '#testing/test-helper';
diff --git a/test/unit/test-integration.js b/test/unit/test-integration.js
index 53d0c7469028..152a721b1235 100644
--- a/test/unit/test-integration.js
+++ b/test/unit/test-integration.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Tests integration.js
 // Most coverage through test-3p-frame
 
diff --git a/test/unit/test-intersection-observer-polyfill.js b/test/unit/test-intersection-observer-polyfill.js
index df16b3e60330..4a75dcbb63e0 100644
--- a/test/unit/test-intersection-observer-polyfill.js
+++ b/test/unit/test-intersection-observer-polyfill.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {layoutRectLtwh} from '#core/dom/layout/rect';
 
 import {AmpDocService} from '#service/ampdoc-impl';
diff --git a/test/unit/test-loader.js b/test/unit/test-loader.js
index 8d0da694e1da..151fcd1dd9b6 100644
--- a/test/unit/test-loader.js
+++ b/test/unit/test-loader.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {Services} from '#service';
diff --git a/test/unit/test-loading-indicator.js b/test/unit/test-loading-indicator.js
index b18df43494ae..a318da21859a 100644
--- a/test/unit/test-loading-indicator.js
+++ b/test/unit/test-loading-indicator.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {pushIfNotExist, removeItem} from '#core/types/array';
 
 import {Services} from '#service';
diff --git a/test/unit/test-localization.js b/test/unit/test-localization.js
index 3308034bcdd7..afa67587c919 100644
--- a/test/unit/test-localization.js
+++ b/test/unit/test-localization.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {
   LocalizationService,
diff --git a/test/unit/test-log.js b/test/unit/test-log.js
index 6cf0df398740..d99b9b52d972 100644
--- a/test/unit/test-log.js
+++ b/test/unit/test-log.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   USER_ERROR_SENTINEL,
   isUserErrorEmbedMessage,
diff --git a/test/unit/test-mediasession-helper.js b/test/unit/test-mediasession-helper.js
index 89c9ca733efb..6990ca108acd 100644
--- a/test/unit/test-mediasession-helper.js
+++ b/test/unit/test-mediasession-helper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {
diff --git a/test/unit/test-modal.js b/test/unit/test-modal.js
index b50fe70e6a35..75da3369cfd5 100644
--- a/test/unit/test-modal.js
+++ b/test/unit/test-modal.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 /**
  * @fileoverview Description of this file.
  */
diff --git a/test/unit/test-mode.js b/test/unit/test-mode.js
index 011fc5f81d26..c63827aaca4b 100644
--- a/test/unit/test-mode.js
+++ b/test/unit/test-mode.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   getMode,
   getRtvVersionForTesting,
diff --git a/test/unit/test-motion.js b/test/unit/test-motion.js
index ae8ed295f6a3..bb8093d9a84e 100644
--- a/test/unit/test-motion.js
+++ b/test/unit/test-motion.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {calcVelocity, continueMotion} from '../../src/motion';
 
 describes.sandboxed('Motion calcVelocity', {}, () => {
diff --git a/test/unit/test-mustache.js b/test/unit/test-mustache.js
index fb1771e1a43b..b3d6d6507343 100644
--- a/test/unit/test-mustache.js
+++ b/test/unit/test-mustache.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import mustache from '#third_party/mustache/mustache';
 
 describes.sandboxed('Mustache', {}, () => {
diff --git a/test/unit/test-mutator.js b/test/unit/test-mutator.js
index 409514320779..5231973ef707 100644
--- a/test/unit/test-mutator.js
+++ b/test/unit/test-mutator.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {VisibilityState} from '#core/constants/visibility-state';
diff --git a/test/unit/test-navigation.js b/test/unit/test-navigation.js
index 263658cd57bd..aebab0bad96b 100644
--- a/test/unit/test-navigation.js
+++ b/test/unit/test-navigation.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {createElementWithAttributes} from '#core/dom';
 
 import {Services} from '#service';
diff --git a/test/unit/test-notification-ui-manager.js b/test/unit/test-notification-ui-manager.js
index a608b98f395f..d10437d4e9ce 100644
--- a/test/unit/test-notification-ui-manager.js
+++ b/test/unit/test-notification-ui-manager.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {NotificationUiManager} from '#service/notification-ui-manager';
 
 import {macroTask} from '#testing/helpers';
diff --git a/test/unit/test-open-window-dialog.js b/test/unit/test-open-window-dialog.js
index a7240e9e16ba..672d153cdae3 100644
--- a/test/unit/test-open-window-dialog.js
+++ b/test/unit/test-open-window-dialog.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {openWindowDialog} from '../../src/open-window-dialog';
 
 describes.sandboxed('openWindowDialog', {}, (env) => {
diff --git a/test/unit/test-origin-experiments.js b/test/unit/test-origin-experiments.js
index e20eb5a76e99..4fe92ca23642 100644
--- a/test/unit/test-origin-experiments.js
+++ b/test/unit/test-origin-experiments.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {bytesToString} from '#core/types/string/bytes';
 
 import {Services} from '#service';
diff --git a/test/unit/test-owners.js b/test/unit/test-owners.js
index 979b81800d75..c2504b35e138 100644
--- a/test/unit/test-owners.js
+++ b/test/unit/test-owners.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {Resource, ResourceState} from '#service/resource';
 
diff --git a/test/unit/test-pass.js b/test/unit/test-pass.js
index 00cbdfa41def..f9a5b2c88036 100644
--- a/test/unit/test-pass.js
+++ b/test/unit/test-pass.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {Pass} from '../../src/pass';
diff --git a/test/unit/test-performance.js b/test/unit/test-performance.js
index c433f352e101..b0e5b0e220fd 100644
--- a/test/unit/test-performance.js
+++ b/test/unit/test-performance.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {VisibilityState} from '#core/constants/visibility-state';
diff --git a/test/unit/test-platform.js b/test/unit/test-platform.js
index 25c84c48935a..20bb0762b628 100644
--- a/test/unit/test-platform.js
+++ b/test/unit/test-platform.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Platform} from '#service/platform-impl';
 
 describes.sandboxed('Platform', {}, (env) => {
diff --git a/test/unit/test-position-observer.js b/test/unit/test-position-observer.js
index 9aae501eb644..301bd4348adf 100644
--- a/test/unit/test-position-observer.js
+++ b/test/unit/test-position-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {layoutRectLtwh} from '#core/dom/layout/rect';
diff --git a/test/unit/test-preconnect.js b/test/unit/test-preconnect.js
index 8ef56c656721..c4359e3d7a73 100644
--- a/test/unit/test-preconnect.js
+++ b/test/unit/test-preconnect.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {Services} from '#service';
diff --git a/test/unit/test-pull-to-refresh.js b/test/unit/test-pull-to-refresh.js
index e8a8da88e54f..119518650937 100644
--- a/test/unit/test-pull-to-refresh.js
+++ b/test/unit/test-pull-to-refresh.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {PullToRefreshBlocker} from '../../src/pull-to-refresh';
 
 describes.sandboxed('PullToRefreshBlocker', {}, (env) => {
diff --git a/test/unit/test-purifier.js b/test/unit/test-purifier.js
index 203db3c3d025..8d4aeb03be20 100644
--- a/test/unit/test-purifier.js
+++ b/test/unit/test-purifier.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Purifier} from '#purifier';
 
 import * as urlRewrite from '../../src/url-rewrite';
diff --git a/test/unit/test-real-time-config.js b/test/unit/test-real-time-config.js
index 0711bc11a568..941d13c2fc22 100644
--- a/test/unit/test-real-time-config.js
+++ b/test/unit/test-real-time-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 // Need the following side-effect import because in actual production code,
 // Fast Fetch impls are always loaded via an AmpAd tag, which means AmpAd is
 // always available for them. However, when we test an impl in isolation,
diff --git a/test/unit/test-render-delaying-services.js b/test/unit/test-render-delaying-services.js
index 0c082c42136c..79c944c95ccb 100644
--- a/test/unit/test-render-delaying-services.js
+++ b/test/unit/test-render-delaying-services.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {macroTask} from '#testing/helpers';
diff --git a/test/unit/test-resource.js b/test/unit/test-resource.js
index 577f914b9cf6..78dcf58cd189 100644
--- a/test/unit/test-resource.js
+++ b/test/unit/test-resource.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {LayoutPriority} from '#core/dom/layout';
 import {layoutRectLtwh} from '#core/dom/layout/rect';
 
diff --git a/test/unit/test-resources.js b/test/unit/test-resources.js
index 11a02509f3f4..7f04cb637a5b 100644
--- a/test/unit/test-resources.js
+++ b/test/unit/test-resources.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {VisibilityState} from '#core/constants/visibility-state';
diff --git a/test/unit/test-runtime.js b/test/unit/test-runtime.js
index 45270f9dd0a6..ee2633b385ed 100644
--- a/test/unit/test-runtime.js
+++ b/test/unit/test-runtime.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as dom from '#core/dom';
 import {setShadowDomSupportedVersionForTesting} from '#core/dom/web-components';
 import {toArray} from '#core/types/array';
diff --git a/test/unit/test-sanitizer.js b/test/unit/test-sanitizer.js
index 03ec8cd0ee6a..6728dc1a6e05 100644
--- a/test/unit/test-sanitizer.js
+++ b/test/unit/test-sanitizer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {sanitizeHtml, sanitizeTagsForTripleMustache} from '../../src/sanitizer';
 
 let sanitize;
diff --git a/test/unit/test-scheduler.js b/test/unit/test-scheduler.js
index 6e8837f98d96..a2656592f363 100644
--- a/test/unit/test-scheduler.js
+++ b/test/unit/test-scheduler.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {createElementWithAttributes} from '#core/dom';
diff --git a/test/unit/test-service.js b/test/unit/test-service.js
index 04f7e20dbabf..fed135f46537 100644
--- a/test/unit/test-service.js
+++ b/test/unit/test-service.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {loadPromise} from '../../src/event-helper';
 import {
   adoptServiceFactoryForEmbedDoc,
diff --git a/test/unit/test-shadow-embed.js b/test/unit/test-shadow-embed.js
index 9b1557a5ae8e..03e7ddf433bf 100644
--- a/test/unit/test-shadow-embed.js
+++ b/test/unit/test-shadow-embed.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   ShadowDomVersion,
   setShadowCssSupportedForTesting,
diff --git a/test/unit/test-ssr-template-helper.js b/test/unit/test-ssr-template-helper.js
index 92acb5ffecb5..08a303ca5cfa 100644
--- a/test/unit/test-ssr-template-helper.js
+++ b/test/unit/test-ssr-template-helper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {SsrTemplateHelper} from '../../src/ssr-template-helper';
diff --git a/test/unit/test-standard-actions.js b/test/unit/test-standard-actions.js
index ab1a31858b68..ceec7b0ea098 100644
--- a/test/unit/test-standard-actions.js
+++ b/test/unit/test-standard-actions.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {RAW_OBJECT_ARGS_KEY} from '#core/constants/action-constants';
 import {htmlFor} from '#core/dom/static-template';
 import {toggle} from '#core/dom/style';
diff --git a/test/unit/test-storage.js b/test/unit/test-storage.js
index 9700cdc117dd..d618ecb98942 100644
--- a/test/unit/test-storage.js
+++ b/test/unit/test-storage.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {AmpDocSingle} from '#service/ampdoc-impl';
 import {
   LocalStorageBinding,
diff --git a/test/unit/test-style-installer.js b/test/unit/test-style-installer.js
index 3a0d9bf10b69..b54a02b07097 100644
--- a/test/unit/test-style-installer.js
+++ b/test/unit/test-style-installer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getStyle} from '#core/dom/style';
 import {setShadowDomSupportedVersionForTesting} from '#core/dom/web-components';
 
diff --git a/test/unit/test-task-queue.js b/test/unit/test-task-queue.js
index 887259ed0fbf..0cfc17802f6c 100644
--- a/test/unit/test-task-queue.js
+++ b/test/unit/test-task-queue.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {TaskQueue} from '#service/task-queue';
 
 describes.sandboxed('TaskQueue', {}, (env) => {
diff --git a/test/unit/test-template.js b/test/unit/test-template.js
index ac6a8f261c69..b80c02d03c52 100644
--- a/test/unit/test-template.js
+++ b/test/unit/test-template.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {
   installTemplatesServiceForDoc,
diff --git a/test/unit/test-timer.js b/test/unit/test-timer.js
index f49fd0e22a52..8fb85d8bf4a0 100644
--- a/test/unit/test-timer.js
+++ b/test/unit/test-timer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Timer} from '#service/timer-impl';
 
 describes.fakeWin('Timer', {}, (env) => {
diff --git a/test/unit/test-url-replacements.js b/test/unit/test-url-replacements.js
index 575285e35205..eb56eb80e671 100644
--- a/test/unit/test-url-replacements.js
+++ b/test/unit/test-url-replacements.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Observable} from '#core/data-structures/observable';
 
 import {Services} from '#service';
diff --git a/test/unit/test-url-rewrite.js b/test/unit/test-url-rewrite.js
index 90d911aae35c..e694c0c0f13e 100644
--- a/test/unit/test-url-rewrite.js
+++ b/test/unit/test-url-rewrite.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   resolveUrlAttr,
   rewriteAttributesForElement,
diff --git a/test/unit/test-url.js b/test/unit/test-url.js
index ded04f9bdc84..dc1d82385c64 100644
--- a/test/unit/test-url.js
+++ b/test/unit/test-url.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 
 import {
diff --git a/test/unit/test-validator-integration.js b/test/unit/test-validator-integration.js
index 028c252cc930..5889c761606a 100644
--- a/test/unit/test-validator-integration.js
+++ b/test/unit/test-validator-integration.js
@@ -1,21 +1,6 @@
 /**
  * @fileoverview Description of this file.
  */
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 
 import * as eventHelper from '../../src/event-helper';
 import * as mode from '../../src/mode';
diff --git a/test/unit/test-variable-source.js b/test/unit/test-variable-source.js
index 9004f231690e..9007f54e84a7 100644
--- a/test/unit/test-variable-source.js
+++ b/test/unit/test-variable-source.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {VariableSource, getTimingDataAsync} from '#service/variable-source';
 
 describes.fakeWin(
diff --git a/test/unit/test-video-analytics-percentage-tracker.js b/test/unit/test-video-analytics-percentage-tracker.js
index 539d85fc988a..a134b43a5239 100644
--- a/test/unit/test-video-analytics-percentage-tracker.js
+++ b/test/unit/test-video-analytics-percentage-tracker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {
   AnalyticsPercentageTracker,
diff --git a/test/unit/test-video-iframe-integration.js b/test/unit/test-video-iframe-integration.js
index c2f910570e01..c749fddd5d16 100644
--- a/test/unit/test-video-iframe-integration.js
+++ b/test/unit/test-video-iframe-integration.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {
   AmpVideoIntegration,
   adopt,
diff --git a/test/unit/test-video-rotate-to-fullscreen.js b/test/unit/test-video-rotate-to-fullscreen.js
index d6a39bd176fa..1e7e20d51e0a 100644
--- a/test/unit/test-video-rotate-to-fullscreen.js
+++ b/test/unit/test-video-rotate-to-fullscreen.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Services} from '#service';
 import {AutoFullscreenManager} from '#service/video-manager-impl';
 
diff --git a/test/unit/test-video-session-manager.js b/test/unit/test-video-session-manager.js
index 201963a3309e..5e9c15ce8583 100644
--- a/test/unit/test-video-session-manager.js
+++ b/test/unit/test-video-session-manager.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {VideoSessionManager} from '#service/video-session-manager';
 
 describes.sandboxed('VideoSessionManager', {}, (env) => {
diff --git a/test/unit/test-viewer-cid-api.js b/test/unit/test-viewer-cid-api.js
index 48232c7cad80..47d3cebb7d59 100644
--- a/test/unit/test-viewer-cid-api.js
+++ b/test/unit/test-viewer-cid-api.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {ViewerCidApi} from '#service/viewer-cid-api';
diff --git a/test/unit/test-viewer.js b/test/unit/test-viewer.js
index 0f1593ccbbaa..599a9e8e309c 100644
--- a/test/unit/test-viewer.js
+++ b/test/unit/test-viewer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseQueryString} from '#core/types/string/url';
 
 import {Services} from '#service';
diff --git a/test/unit/test-viewport-binding.js b/test/unit/test-viewport-binding.js
index 67a14cc829e4..19e972bcd6c2 100644
--- a/test/unit/test-viewport-binding.js
+++ b/test/unit/test-viewport-binding.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {whenDocumentReady} from '#core/document-ready';
 
 import {toggleExperiment} from '#experiments';
diff --git a/test/unit/test-viewport.js b/test/unit/test-viewport.js
index ce10f8888bee..7671008802c6 100644
--- a/test/unit/test-viewport.js
+++ b/test/unit/test-viewport.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {layoutRectLtwh} from '#core/dom/layout/rect';
 
 import {Services} from '#service';
diff --git a/test/unit/test-vsync.js b/test/unit/test-vsync.js
index e00e716fa77c..3ab6bfa6e808 100644
--- a/test/unit/test-vsync.js
+++ b/test/unit/test-vsync.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {AmpDocShadow, installDocService} from '#service/ampdoc-impl';
 import {installTimerService} from '#service/timer-impl';
diff --git a/test/unit/test-xhr-document-fetcher.js b/test/unit/test-xhr-document-fetcher.js
index 2081e9f129cb..03a630ae5540 100644
--- a/test/unit/test-xhr-document-fetcher.js
+++ b/test/unit/test-xhr-document-fetcher.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {Services} from '#service';
 
 import {fetchDocument} from '../../src/document-fetcher';
diff --git a/test/unit/test-xhr-fetch-polyfill.js b/test/unit/test-xhr-fetch-polyfill.js
index f2a604afa31c..7cbbb85689cb 100644
--- a/test/unit/test-xhr-fetch-polyfill.js
+++ b/test/unit/test-xhr-fetch-polyfill.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Response, fetchPolyfill} from '#polyfills/fetch';
 
 import {Services} from '#service';
diff --git a/test/unit/test-xhr.js b/test/unit/test-xhr.js
index f0efb9c636f0..67c850ca0b51 100644
--- a/test/unit/test-xhr.js
+++ b/test/unit/test-xhr.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {utf8Decode} from '#core/types/string/bytes';
 
 import {toggleExperiment} from '#experiments';
diff --git a/test/unit/test-yield.js b/test/unit/test-yield.js
index feaa21e76f3b..2fd9dad88f15 100644
--- a/test/unit/test-yield.js
+++ b/test/unit/test-yield.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import * as fakeTimers from '@sinonjs/fake-timers';
 
 import {macroTask} from '#testing/helpers';
diff --git a/test/unit/url-expander/test-expander.js b/test/unit/url-expander/test-expander.js
index f7bec14f3da6..b459f23a454b 100644
--- a/test/unit/url-expander/test-expander.js
+++ b/test/unit/url-expander/test-expander.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2018 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Expander} from '#service/url-expander/expander';
 import {GlobalVariableSource} from '#service/url-replacements-impl';
 
diff --git a/test/unit/utils/test-display-observer.js b/test/unit/utils/test-display-observer.js
index 98be10f7b1b7..871ce3499aeb 100644
--- a/test/unit/utils/test-display-observer.js
+++ b/test/unit/utils/test-display-observer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Deferred} from '#core/data-structures/promise';
 import {removeItem} from '#core/types/array';
 
diff --git a/test/unit/utils/test-dom-ancestor-visitor.js b/test/unit/utils/test-dom-ancestor-visitor.js
index 558f1ee423ac..58a850fe82e5 100644
--- a/test/unit/utils/test-dom-ancestor-visitor.js
+++ b/test/unit/utils/test-dom-ancestor-visitor.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 import {DomAncestorVisitor} from '../../../src/utils/dom-ancestor-visitor';
 
 describes.realWin('#DomAncestorVisitor', {amp: true}, (env) => {
diff --git a/test/unit/utils/test-dom-transform-stream.js b/test/unit/utils/test-dom-transform-stream.js
index 29a1c61f2414..b4d98dd37141 100644
--- a/test/unit/utils/test-dom-transform-stream.js
+++ b/test/unit/utils/test-dom-transform-stream.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {macroTask} from '#testing/helpers';
 
 import {DomTransformStream} from '../../../src/utils/dom-tranform-stream';
diff --git a/test/unit/utils/test-dom-writer.js b/test/unit/utils/test-dom-writer.js
index 659ab14cf152..8f37972c97c8 100644
--- a/test/unit/utils/test-dom-writer.js
+++ b/test/unit/utils/test-dom-writer.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {DomWriterBulk, DomWriterStreamer} from '../../../src/utils/dom-writer';
 
 describes.fakeWin('DomWriterStreamer', {amp: true}, (env) => {
diff --git a/test/unit/utils/test-xhr-utils.js b/test/unit/utils/test-xhr-utils.js
index 41c8f13d1948..8fa7a5c7909e 100644
--- a/test/unit/utils/test-xhr-utils.js
+++ b/test/unit/utils/test-xhr-utils.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {dict} from '#core/types/object';
 
 import {Services} from '#service';
diff --git a/test/unit/web-worker/test-amp-worker.js b/test/unit/web-worker/test-amp-worker.js
index 8ad742ed3066..4e33791d9a6e 100644
--- a/test/unit/web-worker/test-amp-worker.js
+++ b/test/unit/web-worker/test-amp-worker.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {Services} from '#service';
 import {installXhrService} from '#service/xhr-impl';
 
diff --git a/test/visual-diff/visual-tests b/test/visual-diff/visual-tests
index 5c0548c339b4..4a0746a5e1e4 100644
--- a/test/visual-diff/visual-tests
+++ b/test/visual-diff/visual-tests
@@ -1,18 +1,4 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 /**
  * Particulars of the webpages used in the AMP visual diff tests.
diff --git a/testing/.eslintrc.js b/testing/.eslintrc.js
index b41a23cff5a0..aa0ba4025ef8 100644
--- a/testing/.eslintrc.js
+++ b/testing/.eslintrc.js
@@ -1,18 +1,4 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 module.exports = {
   'rules': {
diff --git a/testing/amp-performance-extension/README.md b/testing/amp-performance-extension/README.md
index d1b8cfcfb1d3..23fa02b9db0d 100644
--- a/testing/amp-performance-extension/README.md
+++ b/testing/amp-performance-extension/README.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2020 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Chrome Extension for Measuring AMP page performance
 
 Install this extension to test existing public AMP docs for performance.
diff --git a/testing/amp-performance-extension/background.js b/testing/amp-performance-extension/background.js
index 705a368e9ccd..269abdbd2213 100644
--- a/testing/amp-performance-extension/background.js
+++ b/testing/amp-performance-extension/background.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /* eslint-disable no-undef */
 chrome.browserAction.setBadgeText({
   text: 'ON',
diff --git a/testing/amp-performance-extension/measure.js b/testing/amp-performance-extension/measure.js
index 78300d849569..d3b84f6549ab 100644
--- a/testing/amp-performance-extension/measure.js
+++ b/testing/amp-performance-extension/measure.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 let cumulativeLayoutShift, largestContentfulPaint, longTasks;
 let measureStarted; // eslint-disable-line no-unused-vars
 
diff --git a/testing/async-errors.js b/testing/async-errors.js
index 58788092748a..08e8ec9c83bc 100644
--- a/testing/async-errors.js
+++ b/testing/async-errors.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 import sinon from 'sinon'; // eslint-disable-line local/no-import
diff --git a/testing/console-logging-setup.js b/testing/console-logging-setup.js
index 56c7b9d6de43..0b1e0f35e67a 100644
--- a/testing/console-logging-setup.js
+++ b/testing/console-logging-setup.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 import sinon from 'sinon'; // eslint-disable-line local/no-import
diff --git a/testing/describes.js b/testing/describes.js
index 8776ad5ee129..f6673b413591 100644
--- a/testing/describes.js
+++ b/testing/describes.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 /**
diff --git a/testing/element-v1.js b/testing/element-v1.js
index 4fecb3278022..4f3da6293188 100644
--- a/testing/element-v1.js
+++ b/testing/element-v1.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {BaseElement} from '../src/base-element';
 
 /**
diff --git a/testing/fake-dom.js b/testing/fake-dom.js
index d7e4fd59b4dd..b0c85a66bbf3 100644
--- a/testing/fake-dom.js
+++ b/testing/fake-dom.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {parseUrlDeprecated, resolveRelativeUrl} from '../src/url';
 
 /**
diff --git a/testing/iframe.js b/testing/iframe.js
index 589a495f4ff5..23ee9b5a3b51 100644
--- a/testing/iframe.js
+++ b/testing/iframe.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {deserializeMessage, isAmpMessage} from '#core/3p-frame-messaging';
 import {AmpEvents} from '#core/constants/amp-events';
 
diff --git a/testing/init-tests.js b/testing/init-tests.js
index 237a6080af13..67eb039f5245 100644
--- a/testing/init-tests.js
+++ b/testing/init-tests.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 // These two imports must precede all others.
diff --git a/testing/intersection-observer-stub.js b/testing/intersection-observer-stub.js
index 170633e7e9fb..8bc2086aecf8 100644
--- a/testing/intersection-observer-stub.js
+++ b/testing/intersection-observer-stub.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {areEqualOrdered} from '#core/types/array';
 
 /**
diff --git a/testing/local-amp-chrome-extension/README.md b/testing/local-amp-chrome-extension/README.md
index bc7842520187..90de41638fe0 100644
--- a/testing/local-amp-chrome-extension/README.md
+++ b/testing/local-amp-chrome-extension/README.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # Chrome extension for loading public websites with a local AMP.
 
 Install this extension to test existing public AMP docs against the current version in your development tree.
diff --git a/testing/local-amp-chrome-extension/background.js b/testing/local-amp-chrome-extension/background.js
index 33e8054545b7..3fc3afaf841d 100644
--- a/testing/local-amp-chrome-extension/background.js
+++ b/testing/local-amp-chrome-extension/background.js
@@ -1,18 +1,4 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 var disabled = false;
 
diff --git a/testing/local-amp-chrome-extension/popup.js b/testing/local-amp-chrome-extension/popup.js
index 24589b94f9ca..455337ed1ab8 100644
--- a/testing/local-amp-chrome-extension/popup.js
+++ b/testing/local-amp-chrome-extension/popup.js
@@ -1,18 +1,4 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 const background = chrome.extension.getBackgroundPage(); // eslint-disable-line no-undef
 
diff --git a/testing/resize-observer-stub.js b/testing/resize-observer-stub.js
index 2496b9b73c9d..2dbcdf8ced66 100644
--- a/testing/resize-observer-stub.js
+++ b/testing/resize-observer-stub.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @param {!Object} sandbox
  * @param {!Window} window
diff --git a/testing/setup_chai_sinon.js b/testing/setup_chai_sinon.js
index c5176411e8ac..3ec9d1ad3e90 100644
--- a/testing/setup_chai_sinon.js
+++ b/testing/setup_chai_sinon.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import chai from 'chai';
 import chaiAsPromised from 'chai-as-promised';
 import stringify from 'json-stable-stringify';
diff --git a/testing/test-config.js b/testing/test-config.js
index 039071f6940d..c287efb639b1 100644
--- a/testing/test-config.js
+++ b/testing/test-config.js
@@ -1,18 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 'use strict';
 
 import {Services} from '#service';
diff --git a/testing/test-helper.js b/testing/test-helper.js
index 02a11168e098..c4045d1a7cd1 100644
--- a/testing/test-helper.js
+++ b/testing/test-helper.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2016 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import {getStyle} from '#core/dom/style';
 import {WindowInterface} from '#core/window/interface';
 
diff --git a/testing/yield.js b/testing/yield.js
index 566b499c7922..4c92f8e41229 100644
--- a/testing/yield.js
+++ b/testing/yield.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * Install "YieldIt" support to Mocha tests.
  * "YieldIt" allows you to wait for a promise to resolve before resuming your
diff --git a/third_party/closure-library/sha384.js b/third_party/closure-library/sha384.js
index 2af91d64fa8d..79da1a447990 100644
--- a/third_party/closure-library/sha384.js
+++ b/third_party/closure-library/sha384.js
@@ -1,18 +1,4 @@
-/**
- * Copyright 2015 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 
 // Required for calcdeps, but does weird things when compiling.
 // goog.provide('__AMP_SHA384_DIGEST');
diff --git a/third_party/react-dates/scope-require.js b/third_party/react-dates/scope-require.js
index 3b0fb00a8c85..9681dc79126f 100644
--- a/third_party/react-dates/scope-require.js
+++ b/third_party/react-dates/scope-require.js
@@ -1,18 +1,4 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+
 'use strict';
 
 const astReplace = require('ast-replace');
diff --git a/tools/experiments/experiments-config.js b/tools/experiments/experiments-config.js
index 46eb45f826eb..02d5c0796c83 100644
--- a/tools/experiments/experiments-config.js
+++ b/tools/experiments/experiments-config.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 /**
  * @fileoverview This file contains experiment configurations that are
  * used in experiment.js. If you are launching a new feature, you should
diff --git a/tools/experiments/experiments.js b/tools/experiments/experiments.js
index 8677acd1052b..b0ccd89921f8 100644
--- a/tools/experiments/experiments.js
+++ b/tools/experiments/experiments.js
@@ -1,19 +1,3 @@
-/**
- * Copyright 2017 The AMP HTML Authors. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 import '#polyfills';
 import '#service/timer-impl';
 import {Deferred} from '#core/data-structures/promise';
diff --git a/validator/README.md b/validator/README.md
index dc9758d7891a..5cb88dfa678d 100644
--- a/validator/README.md
+++ b/validator/README.md
@@ -1,19 +1,3 @@
-<!---
-Copyright 2015 The AMP HTML Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS-IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
 # AMP HTML ⚡ Validator
 
 A validator for the