fix(material/tooltip): remove deprecated animation definitions

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

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

Author: crisbeto

goldens/material/tooltip/index.api.md

@@ -103,11 +103,6 @@ export class MatTooltip implements OnDestroy, AfterViewInit {
     static ɵfac: i0.ɵɵFactoryDeclaration<MatTooltip, never>;
 }
 
-// @public @deprecated
-export const matTooltipAnimations: {
-    readonly tooltipState: any;
-};
-
 // @public
 export interface MatTooltipDefaultOptions {
     disableTooltipInteractivity?: boolean;

src/material/tooltip/BUILD.bazel

@@ -66,7 +66,6 @@ ng_project(
         "index.ts",
         "public-api.ts",
         "tooltip.ts",
-        "tooltip-animations.ts",
         "tooltip-module.ts",
     ],
     assets = [

src/material/tooltip/public-api.ts

@@ -7,5 +7,4 @@
  */
 
 export * from './tooltip';
-export * from './tooltip-animations';
 export * from './tooltip-module';