Drop export of built-ins, remove legacy components

* Remove the export of `@ember/component/checkbox`
* Remove the export of `@ember/component/text-field`
* Remove the export of `@ember/component/text-area`
* Remove the export of `@ember/component/link-component`
* Remove the assignment of `Ember.Checkbox`
* Remove the assignment of `Ember.TextField`
* Remove the assignment of `Ember.TextArea`
* Remove the assignment of `Ember.LinkComponent`
* Remove the assignment of `Ember.TextSupport`
* Remove the assignment of `Ember.TargetActionSupport`
* Hard-code `EMBER_MODERNIZED_BUILT_IN_COMPONENTS` to `true` path in
  most places. The remaining are a few spots where there are
  deprecations targeting *5.0*.
* Hard-code the built-in components (`<Textarea>`, `<Input>`,
  `<LinkTo>`) for the modernized path
* Remove the `query-params` helper (it is only needed by the legacy
  `LinkComponent` and was deprecated).
* Review emberjs#19669 and ensure all
  `disabledWhen` is removed.
* Review emberjs#19662 and ensure all
  `@tagName` support is removed
* Review all `ember.built-in-components.*` deprecations and ensure their
  functionality is removed.
* Remove code supporting `ember-glimmer.link-to.positional-arguments`,
  basically
  https://github.com/emberjs/ember.js/blob/master/packages/ember-template-compiler/lib/plugins/transform-link-to.ts

packages/@ember/-internals/glimmer/index.ts

@@ -295,11 +295,8 @@
 export { templateFactory as template, templateCacheCounters } from '@glimmer/opcode-compiler';
 
 export { default as RootTemplate } from './lib/templates/root';
-export { default as Checkbox } from './lib/components/checkbox';
-export { default as TextField } from './lib/components/text-field';
-export { default as TextArea } from './lib/components/-textarea';
-export { default as LinkComponent } from './lib/components/-link-to';
 export { default as Input } from './lib/components/input';
+export { default as LinkTo } from './lib/components/link-to';
 export { default as Textarea } from './lib/components/textarea';
 export { default as Component } from './lib/component';
 export { default as Helper, helper } from './lib/helper';

packages/@ember/-internals/glimmer/lib/component.ts

@@ -1,6 +1,6 @@
 import { get, PROPERTY_DID_CHANGE } from '@ember/-internals/metal';
 import { getOwner } from '@ember/-internals/owner';
-import { CoreObject, TargetActionSupport } from '@ember/-internals/runtime';
+import { TargetActionSupport } from '@ember/-internals/runtime';
 import {
   ActionSupport,
   ChildViewsSupport,
@@ -11,8 +11,7 @@ import {
   ViewMixin,
   ViewStateSupport,
 } from '@ember/-internals/views';
-import { EMBER_MODERNIZED_BUILT_IN_COMPONENTS } from '@ember/canary-features';
-import { assert, deprecate } from '@ember/debug';
+import { assert } from '@ember/debug';
 import { DEBUG } from '@glimmer/env';
 import { Environment } from '@glimmer/interfaces';
 import { setInternalComponentManager } from '@glimmer/manager';
@@ -1061,71 +1060,4 @@ Component.reopenClass({
 
 setInternalComponentManager(CURLY_COMPONENT_MANAGER, Component);
 
-if (EMBER_MODERNIZED_BUILT_IN_COMPONENTS) {
-  Object.defineProperty(Component, '_wasReopened', {
-    configurable: true,
-    enumerable: false,
-    writable: true,
-    value: false,
-  });
-
-  Object.defineProperty(Component, 'reopen', {
-    configurable: true,
-    enumerable: false,
-    writable: true,
-    value: function reopen(this: typeof Component, ...args: unknown[]): unknown {
-      if (this === Component) {
-        deprecate(
-          'Reopening the Ember.Component super class itself is deprecated. ' +
-            'Consider alternatives such as installing event listeners on ' +
-            'the document or add the customizations to specific subclasses.',
-          false,
-          {
-            id: 'ember.component.reopen',
-            for: 'ember-source',
-            since: {
-              enabled: '4.0.0',
-            },
-            url: 'https://deprecations.emberjs.com/v4.x#toc_ember-component-reopen',
-            until: '5.0.0',
-          }
-        );
-
-        Component._wasReopened = true;
-      }
-
-      return CoreObject.reopen.call(this, ...args);
-    },
-  });
-
-  Object.defineProperty(Component, 'reopenClass', {
-    configurable: true,
-    enumerable: false,
-    writable: true,
-    value: function reopenClass(this: typeof Component, ...args: unknown[]): unknown {
-      if (this === Component) {
-        deprecate(
-          'Reopening the Ember.Component super class itself is deprecated. ' +
-            'Consider alternatives such as installing event listeners on ' +
-            'the document or add the customizations to specific subclasses.',
-          false,
-          {
-            id: 'ember.component.reopen',
-            for: 'ember-source',
-            url: 'https://deprecations.emberjs.com/v4.x#toc_ember-component-reopen',
-            since: {
-              enabled: '4.0.0',
-            },
-            until: '5.0.0',
-          }
-        );
-
-        Component._wasReopened = true;
-      }
-
-      return CoreObject.reopenClass.call(this, ...args);
-    },
-  });
-}
-
 export default Component;