fix(material/dialog): remove deprecated animation definitions

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

BREAKING CHANGE:
* `_defaultParams` symbol has been removed.
* `matDialogAnimations` symbol has been removed.

Author: crisbeto

goldens/material/dialog/index.api.md

@@ -38,14 +38,6 @@ export type AutoFocusTarget = 'dialog' | 'first-tabbable' | 'first-heading';
 // @public
 export function _closeDialogVia<R>(ref: MatDialogRef<R>, interactionType: FocusOrigin, result?: R): void;
 
-// @public @deprecated
-export const _defaultParams: {
-    params: {
-        enterAnimationDuration: string;
-        exitAnimationDuration: string;
-    };
-};
-
 // @public
 export interface DialogPosition {
     bottom?: string;
@@ -103,11 +95,6 @@ export class MatDialogActions extends MatDialogLayoutSection {
     static ɵfac: i0.ɵɵFactoryDeclaration<MatDialogActions, never>;
 }
 
-// @public @deprecated
-export const matDialogAnimations: {
-    readonly dialogContainer: any;
-};
-
 // @public
 export class MatDialogClose implements OnInit, OnChanges {
     constructor(...args: unknown[]);

src/material/dialog/BUILD.bazel

@@ -73,7 +73,6 @@ ng_project(
     name = "dialog",
     srcs = [
         "dialog.ts",
-        "dialog-animations.ts",
         "dialog-config.ts",
         "dialog-container.ts",
         "dialog-content-directives.ts",

src/material/dialog/dialog-animations.ts

@@ -10,7 +10,6 @@ import {ViewContainerRef, Injector} from '@angular/core';
 import {Direction} from '@angular/cdk/bidi';
 import {ScrollStrategy} from '@angular/cdk/overlay';
 import {DialogConfig} from '@angular/cdk/dialog';
-import {_defaultParams} from './dialog-animations';
 
 /** Options for where to set focus to automatically on dialog open */
 export type AutoFocusTarget = 'dialog' | 'first-tabbable' | 'first-heading';

src/material/dialog/dialog-config.ts

@@ -17,4 +17,3 @@ export {
 } from './dialog-content-directives';
 export {MatDialogContainer} from './dialog-container';
 export * from './dialog-module';
-export {matDialogAnimations, _defaultParams} from './dialog-animations';