refactor(router): remove deprecated RouterOutlet properties (#18781)

BREAKING CHANGE: `RouterOutlet` properties `locationInjector` and `locationFactoryResolver` have been removed as they were deprecated since v4.

PR Close #18781

Author: ocombe

packages/router/src/directives/router_outlet.ts

@@ -72,11 +72,6 @@ export class RouterOutlet implements OnDestroy, OnInit {
     }
   }
 
-  /** @deprecated since v4 **/
-  get locationInjector(): Injector { return this.location.injector; }
-  /** @deprecated since v4 **/
-  get locationFactoryResolver(): ComponentFactoryResolver { return this.resolver; }
-
   get isActivated(): boolean { return !!this.activated; }
 
   get component(): Object {

tools/public_api_guard/router/router.d.ts

@@ -409,8 +409,6 @@ export declare class RouterOutlet implements OnDestroy, OnInit {
     readonly component: Object;
     deactivateEvents: EventEmitter<any>;
     readonly isActivated: boolean;
-    /** @deprecated */ readonly locationFactoryResolver: ComponentFactoryResolver;
-    /** @deprecated */ readonly locationInjector: Injector;
     constructor(parentContexts: ChildrenOutletContexts, location: ViewContainerRef, resolver: ComponentFactoryResolver, name: string, changeDetector: ChangeDetectorRef);
     activateWith(activatedRoute: ActivatedRoute, resolver: ComponentFactoryResolver | null): void;
     attach(ref: ComponentRef<any>, activatedRoute: ActivatedRoute): void;