fix(material/sidenav): remove deprecated factory functions

Removes factory functions that we had marked as deprecated for v21. These functions aren't necessary since we switched to standalone.

BREAKING CHANGE:
* `MAT_DRAWER_DEFAULT_AUTOSIZE_FACTORY` has been removed.

Author: crisbeto

goldens/material/sidenav/index.api.md

@@ -25,9 +25,6 @@ import { Subject } from 'rxjs';
 // @public
 export const MAT_DRAWER_DEFAULT_AUTOSIZE: InjectionToken<boolean>;
 
-// @public @deprecated
-export function MAT_DRAWER_DEFAULT_AUTOSIZE_FACTORY(): boolean;
-
 // @public
 export class MatDrawer implements AfterViewInit, OnDestroy {
     constructor(...args: unknown[]);

src/material/sidenav/drawer.ts

@@ -70,7 +70,7 @@ export const MAT_DRAWER_DEFAULT_AUTOSIZE = new InjectionToken<boolean>(
   'MAT_DRAWER_DEFAULT_AUTOSIZE',
   {
     providedIn: 'root',
-    factory: MAT_DRAWER_DEFAULT_AUTOSIZE_FACTORY,
+    factory: () => false,
   },
 );
 
@@ -80,15 +80,6 @@ export const MAT_DRAWER_DEFAULT_AUTOSIZE = new InjectionToken<boolean>(
  */
 export const MAT_DRAWER_CONTAINER = new InjectionToken('MAT_DRAWER_CONTAINER');
 
-/**
- * @docs-private
- * @deprecated No longer used, will be removed.
- * @breaking-change 21.0.0
- */
-export function MAT_DRAWER_DEFAULT_AUTOSIZE_FACTORY(): boolean {
-  return false;
-}
-
 @Component({
   selector: 'mat-drawer-content',
   template: '<ng-content></ng-content>',

src/material/sidenav/public-api.ts

@@ -11,7 +11,6 @@ export {
   throwMatDuplicatedDrawerError,
   MatDrawerToggleResult,
   MAT_DRAWER_DEFAULT_AUTOSIZE,
-  MAT_DRAWER_DEFAULT_AUTOSIZE_FACTORY,
   MatDrawerContent,
   MatDrawer,
   MatDrawerContainer,