fix(cdk/dialog): breaking changes for v20

Removes the deprecated symbols for v20 from `cdk/dialog`.

BREAKING CHANGE:
* `DIALOG_SCROLL_STRATEGY_PROVIDER` has been removed.
* `DIALOG_SCROLL_STRATEGY_PROVIDER_FACTORY` has been removed.

Author: crisbeto

src/cdk/dialog/dialog-injectors.ts

@@ -27,23 +27,3 @@ export const DIALOG_DATA = new InjectionToken<any>('DialogData');
 
 /** Injection token that can be used to provide default options for the dialog module. */
 export const DEFAULT_DIALOG_CONFIG = new InjectionToken<DialogConfig>('DefaultDialogConfig');
-
-/**
- * @docs-private
- * @deprecated No longer used. To be removed.
- * @breaking-change 19.0.0
- */
-export function DIALOG_SCROLL_STRATEGY_PROVIDER_FACTORY(overlay: Overlay): () => ScrollStrategy {
-  return () => overlay.scrollStrategies.block();
-}
-
-/**
- * @docs-private
- * @deprecated No longer used. To be removed.
- * @breaking-change 19.0.0
- */
-export const DIALOG_SCROLL_STRATEGY_PROVIDER = {
-  provide: DIALOG_SCROLL_STRATEGY,
-  deps: [Overlay],
-  useFactory: DIALOG_SCROLL_STRATEGY_PROVIDER_FACTORY,
-};

tools/public_api_guard/cdk/dialog.md

@@ -25,7 +25,6 @@ import { Injector } from '@angular/core';
 import { NgZone } from '@angular/core';
 import { Observable } from 'rxjs';
 import { OnDestroy } from '@angular/core';
-import { Overlay } from '@angular/cdk/overlay';
 import { OverlayRef } from '@angular/cdk/overlay';
 import { PositionStrategy } from '@angular/cdk/overlay';
 import { ScrollStrategy } from '@angular/cdk/overlay';
@@ -107,16 +106,6 @@ export const DIALOG_DATA: InjectionToken<any>;
 // @public
 export const DIALOG_SCROLL_STRATEGY: InjectionToken<() => ScrollStrategy>;
 
-// @public @deprecated
-export const DIALOG_SCROLL_STRATEGY_PROVIDER: {
-    provide: InjectionToken<() => ScrollStrategy>;
-    deps: (typeof Overlay)[];
-    useFactory: typeof DIALOG_SCROLL_STRATEGY_PROVIDER_FACTORY;
-};
-
-// @public @deprecated
-export function DIALOG_SCROLL_STRATEGY_PROVIDER_FACTORY(overlay: Overlay): () => ScrollStrategy;
-
 // @public
 export interface DialogCloseOptions {
     focusOrigin?: FocusOrigin;