fix(material/bottom-sheet): remove deprecated animation definitions

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

BREAKING CHANGE:
* `matBottomSheet` animations symbol has been removed.

Author: crisbeto

goldens/material/bottom-sheet/index.api.md

@@ -46,11 +46,6 @@ export class MatBottomSheet implements OnDestroy {
     static ɵprov: i0.ɵɵInjectableDeclaration<MatBottomSheet>;
 }
 
-// @public @deprecated
-export const matBottomSheetAnimations: {
-    readonly bottomSheetState: any;
-};
-
 // @public
 export class MatBottomSheetConfig<D = any> {
     ariaLabel?: string | null;

src/material/bottom-sheet/BUILD.bazel

@@ -66,7 +66,6 @@ ng_project(
     name = "bottom-sheet",
     srcs = [
         "bottom-sheet.ts",
-        "bottom-sheet-animations.ts",
         "bottom-sheet-config.ts",
         "bottom-sheet-container.ts",
         "bottom-sheet-module.ts",

src/material/bottom-sheet/bottom-sheet-animations.ts

@@ -10,5 +10,4 @@ export * from './bottom-sheet-module';
 export * from './bottom-sheet';
 export * from './bottom-sheet-config';
 export * from './bottom-sheet-container';
-export * from './bottom-sheet-animations';
 export * from './bottom-sheet-ref';