fix(material/tabs): remove deprecated animation definitions

Deletes publicly-exported animation definitions that were marked for removal in v21.

BREAKING CHANGE:
* `matTabsAnimations` symbol has been removed.

Author: crisbeto

goldens/material/tabs/index.api.md

@@ -509,11 +509,6 @@ export class MatTabNavPanel {
     static ɵfac: i0.ɵɵFactoryDeclaration<MatTabNavPanel, never>;
 }
 
-// @public @deprecated
-export const matTabsAnimations: {
-    readonly translateTab: any;
-};
-
 // @public
 export interface MatTabsConfig {
     alignTabs?: 'start' | 'center' | 'end';

src/material/tabs/BUILD.bazel

@@ -122,7 +122,6 @@ ng_project(
         "tab-label.ts",
         "tab-label-wrapper.ts",
         "tab-nav-bar/tab-nav-bar.ts",
-        "tabs-animations.ts",
         "tabs-module.ts",
     ],
     assets = [

src/material/tabs/public-api.ts

@@ -32,5 +32,4 @@ export {
   MatTabHeaderPosition,
 } from './tab-group';
 export {MatTabNav, MatTabNavPanel, MatTabLink} from './tab-nav-bar/tab-nav-bar';
-export {matTabsAnimations} from './tabs-animations';
 export {MatTabLabelWrapper} from './tab-label-wrapper';