diff --git a/images/anim-tao.png b/images/anim-tao.png
deleted file mode 100644
index 925e2efc9a97ade..000000000000000
Binary files a/images/anim-tao.png and /dev/null differ
diff --git a/images/anim-tao.png.headers b/images/anim-tao.png.headers
deleted file mode 100644
index 0230e176e44567f..000000000000000
--- a/images/anim-tao.png.headers
+++ /dev/null
@@ -1,2 +0,0 @@
-Timing-Allow-Origin: *
-
diff --git a/images/webp-animated.webp b/images/webp-animated.webp
deleted file mode 100644
index 35a8dfcf34d5806..000000000000000
Binary files a/images/webp-animated.webp and /dev/null differ
diff --git a/largest-contentful-paint/animated/observe-animated-image-gif.tentative.html b/largest-contentful-paint/animated/observe-animated-image-gif.tentative.html
deleted file mode 100644
index a2c0d7975abe348..000000000000000
--- a/largest-contentful-paint/animated/observe-animated-image-gif.tentative.html
+++ /dev/null
@@ -1,27 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <meta charset=utf-8>
-  <title>Largest Contentful Paint: observe image.</title>
-  <script src="/resources/testharness.js"></script>
-  <script src="/resources/testharnessreport.js"></script>
-  <script src="../resources/largest-contentful-paint-helpers.js"></script>
-</head>
-<body>
-  <script>
-    promise_test(async () => {
-      assert_implements(window.LargestContentfulPaint,
-                        "LargestContentfulPaint is not implemented");
-      const beforeLoad = performance.now();
-      // 136 is the size of the animated GIF up until the first frame.
-      // The trickle pipe delays the response after the first frame by 1 second.
-      const url = window.location.origin +
-                  `/images/anim-gr.gif?pipe=trickle(136:d${delay_pipe_value})`;
-      const entry = await load_and_observe(url);
-      // anim-gr.gif is 100 by 50.
-      const size = 100 * 50;
-      checkImage(entry, url, 'image_id', size, beforeLoad, ["animated"]);
-    }, "Same origin animated image is observable and has a first frame.");
-  </script>
-</body>
-</html>
diff --git a/largest-contentful-paint/animated/observe-animated-image-webp.tentative.html b/largest-contentful-paint/animated/observe-animated-image-webp.tentative.html
deleted file mode 100644
index de59d5c5f78c685..000000000000000
--- a/largest-contentful-paint/animated/observe-animated-image-webp.tentative.html
+++ /dev/null
@@ -1,27 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <meta charset=utf-8>
-  <title>Largest Contentful Paint: observe image.</title>
-  <script src="/resources/testharness.js"></script>
-  <script src="/resources/testharnessreport.js"></script>
-  <script src="../resources/largest-contentful-paint-helpers.js"></script>
-</head>
-<body>
-  <script>
-    promise_test(async () => {
-      assert_implements(window.LargestContentfulPaint,
-                        "LargestContentfulPaint is not implemented");
-      const beforeLoad = performance.now();
-      // 142 is the size of the animated WebP up until the first frame.
-      // The trickle pipe delays the response after the first frame by 1 second.
-      const url = window.location.origin +
-        `/images/webp-animated.webp?pipe=trickle(142:d${delay_pipe_value})`;
-      const entry = await load_and_observe(url);
-      // webp-animated.webp is 11 by 29.
-      const size = 11 * 29;
-      checkImage(entry, url, 'image_id', size, beforeLoad, ["animated"]);
-    }, "Same origin animated image is observable and has a first frame.");
-  </script>
-</body>
-</html>
diff --git a/largest-contentful-paint/animated/observe-animated-image.tentative.html b/largest-contentful-paint/animated/observe-animated-image.tentative.html
deleted file mode 100644
index cf7d262b0f842a0..000000000000000
--- a/largest-contentful-paint/animated/observe-animated-image.tentative.html
+++ /dev/null
@@ -1,29 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <meta charset=utf-8>
-  <title>Largest Contentful Paint: observe image.</title>
-  <script src="/resources/testharness.js"></script>
-  <script src="/resources/testharnessreport.js"></script>
-  <script src="../resources/largest-contentful-paint-helpers.js"></script>
-</head>
-<body>
-  <script>
-    promise_test(async () => {
-      assert_implements(window.LargestContentfulPaint,
-                        "LargestContentfulPaint is not implemented");
-      const beforeLoad = performance.now();
-      // 262 is the size of the animated PNG up until the first frame,
-      // including the chunk that starts the second frame (indicating that
-      // the first frame data is done).
-      // The trickle pipe delays the response after the first frame by 1 second.
-      const url = window.location.origin +
-                  `/images/anim-gr.png?pipe=trickle(262:d${delay_pipe_value})`;
-      const entry = await load_and_observe(url);
-      // anim-gr.png is 100 by 50.
-      const size = 100 * 50;
-      checkImage(entry, url, 'image_id', size, beforeLoad, ["animated"]);
-    }, "Same origin animated image is observable and has a first frame.");
-  </script>
-</body>
-</html>
diff --git a/largest-contentful-paint/animated/observe-cross-origin-animated-image.tentative.html b/largest-contentful-paint/animated/observe-cross-origin-animated-image.tentative.html
deleted file mode 100644
index 993883c607b8f73..000000000000000
--- a/largest-contentful-paint/animated/observe-cross-origin-animated-image.tentative.html
+++ /dev/null
@@ -1,30 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <meta charset=utf-8>
-  <title>Largest Contentful Paint: observe image.</title>
-  <script src="/resources/testharness.js"></script>
-  <script src="/resources/testharnessreport.js"></script>
-  <script src="../resources/largest-contentful-paint-helpers.js"></script>
-  <script src="/common/get-host-info.sub.js"></script>
-</head>
-<body>
-  <script>
-    promise_test(async () => {
-      assert_implements(window.LargestContentfulPaint,
-                        "LargestContentfulPaint is not implemented");
-      const beforeLoad = performance.now();
-      // 262 is the size of the animated PNG up until the first frame,
-      // including the chunk that starts the second frame (indicating that
-      //the first frame data is done).
-      const {REMOTE_ORIGIN} = get_host_info();
-      const url = REMOTE_ORIGIN +
-                  '/images/anim-gr.png?pipe=trickle(262:d1)';
-      const entry = await load_and_observe(url);
-      // anim-gr.png is 100 by 50.
-      const size = 100 * 50;
-      checkImage(entry, url, 'image_id', size, beforeLoad, ["renderTimeIs0", "animated-zero"]);
-    }, "Same origin animated image is observable and has a first frame.");
-  </script>
-</body>
-</html>
diff --git a/largest-contentful-paint/animated/observe-cross-origin-tao-animated-image.tentative.html b/largest-contentful-paint/animated/observe-cross-origin-tao-animated-image.tentative.html
deleted file mode 100644
index 137dde66383f772..000000000000000
--- a/largest-contentful-paint/animated/observe-cross-origin-tao-animated-image.tentative.html
+++ /dev/null
@@ -1,30 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <meta charset=utf-8>
-  <title>Largest Contentful Paint: observe image.</title>
-  <script src="/resources/testharness.js"></script>
-  <script src="/resources/testharnessreport.js"></script>
-  <script src="../resources/largest-contentful-paint-helpers.js"></script>
-  <script src="/common/get-host-info.sub.js"></script>
-</head>
-<body>
-  <script>
-    promise_test(async () => {
-      assert_implements(window.LargestContentfulPaint,
-                        "LargestContentfulPaint is not implemented");
-      const beforeLoad = performance.now();
-      // 262 is the size of the animated PNG up until the first frame,
-      // including the chunk that starts the second frame (indicating that
-      //the first frame data is done).
-      const {REMOTE_ORIGIN} = get_host_info();
-      const url = REMOTE_ORIGIN +
-                  '/images/anim-tao.png?pipe=trickle(262:d1)';
-      const entry = await load_and_observe(url);
-      // anim-gr.png is 100 by 50.
-      const size = 100 * 50;
-      checkImage(entry, url, 'image_id', size, beforeLoad, ["animated"]);
-    }, "Same origin animated image is observable and has a first frame.");
-  </script>
-</body>
-</html>
diff --git a/largest-contentful-paint/animated/observe-non-animated-image.tentative.html b/largest-contentful-paint/animated/observe-non-animated-image.tentative.html
deleted file mode 100644
index 6bbc0958b1deb25..000000000000000
--- a/largest-contentful-paint/animated/observe-non-animated-image.tentative.html
+++ /dev/null
@@ -1,27 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <meta charset=utf-8>
-  <title>Largest Contentful Paint: observe image.</title>
-  <script src="/resources/testharness.js"></script>
-  <script src="/resources/testharnessreport.js"></script>
-  <script src="../resources/largest-contentful-paint-helpers.js"></script>
-</head>
-<body>
-  <script>
-    promise_test(async () => {
-      assert_implements(window.LargestContentfulPaint,
-                        "LargestContentfulPaint is not implemented");
-      const beforeLoad = performance.now();
-      // 262 is the size of the animated PNG up until the first frame,
-      // including the chunk that starts the second frame (indicating that
-      //the first frame data is done).
-      const url = window.location.origin + '/images/blue.png';
-      const entry = await load_and_observe(url);
-      // blue.png is 133 by 106.
-      const size = 133 * 106;
-      checkImage(entry, url, 'image_id', size, beforeLoad, ["animated-zero"]);
-    }, "Same origin animated image is observable and has a first frame.");
-  </script>
-</body>
-</html>
diff --git a/largest-contentful-paint/resources/largest-contentful-paint-helpers.js b/largest-contentful-paint/resources/largest-contentful-paint-helpers.js
index 5012faf3b1be338..e12ece0a7561cba 100644
--- a/largest-contentful-paint/resources/largest-contentful-paint-helpers.js
+++ b/largest-contentful-paint/resources/largest-contentful-paint-helpers.js
@@ -1,6 +1,3 @@
-const image_delay = 1000;
-const delay_pipe_value = image_delay / 1000;
-
 // Receives an image LargestContentfulPaint |entry| and checks |entry|'s attribute values.
 // The |timeLowerBound| parameter is a lower bound on the loadTime value of the entry.
 // The |options| parameter may contain some string values specifying the following:
@@ -36,33 +33,4 @@ function checkImage(entry, expectedUrl, expectedID, expectedSize, timeLowerBound
   } else {
     assert_equals(entry.size, expectedSize);
   }
-  if (options.includes('animated')) {
-    assert_greater_than(entry.loadTime, entry.firstAnimatedFrameTime,
-      'firstAnimatedFrameTime should be smaller than loadTime');
-    assert_greater_than(entry.renderTime, entry.firstAnimatedFrameTime,
-      'firstAnimatedFrameTime should be smaller than renderTime');
-    assert_less_than(entry.firstAnimatedFrameTime, image_delay,
-      'firstAnimatedFrameTime should be smaller than the delay applied to the second frame');
-    assert_greater_than(entry.firstAnimatedFrameTime, 0,
-      'firstAnimatedFrameTime should be larger than 0');
-  }
-  if (options.includes('animated-zero')) {
-    assert_equals(entry.firstAnimatedFrameTime, 0, 'firstAnimatedFrameTime should be 0');
-  }
 }
-
-const load_and_observe = url => {
-  return new Promise(resolve => {
-    (new PerformanceObserver(entryList => {
-      for (let entry of entryList.getEntries()) {
-        if (entry.url == url) {
-          resolve(entryList.getEntries()[0]);
-        }
-      }
-    })).observe({type: 'largest-contentful-paint', buffered: true});
-    const img = new Image();
-    img.id = 'image_id';
-    img.src = url;
-    document.body.appendChild(img);
-  });
-};
