refactor(core): Cleanup for Iterable differs test. (angular#49598)

Remove some `any` and use the non-deprecated `Injector.create` overload.

PR Close angular#49598

Author: JeanMeche

packages/core/test/change_detection/differs/iterable_differs_spec.ts

@@ -11,9 +11,9 @@ import {TestBed} from '@angular/core/testing';
 
 {
   describe('IterableDiffers', function() {
-    let factory1: any;
-    let factory2: any;
-    let factory3: any;
+    let factory1: jasmine.SpyObj<IterableDifferFactory>;
+    let factory2: jasmine.SpyObj<IterableDifferFactory>;
+    let factory3: jasmine.SpyObj<IterableDifferFactory>;
 
     beforeEach(() => {
       const getFactory = () => jasmine.createSpyObj('IterableDifferFactory', ['supports']);
@@ -33,26 +33,26 @@ import {TestBed} from '@angular/core/testing';
       factory2.supports.and.returnValue(true);
       factory3.supports.and.returnValue(true);
 
-      const differs = IterableDiffers.create(<any>[factory1, factory2, factory3]);
+      const differs = IterableDiffers.create([factory1, factory2, factory3]);
       expect(differs.find('some object')).toBe(factory2);
     });
 
     it('should copy over differs from the parent repo', () => {
       factory1.supports.and.returnValue(true);
       factory2.supports.and.returnValue(false);
 
-      const parent = IterableDiffers.create(<any>[factory1]);
-      const child = IterableDiffers.create(<any>[factory2], parent);
+      const parent = IterableDiffers.create([factory1]);
+      const child = IterableDiffers.create([factory2], parent);
 
       // @ts-expect-error private member
       expect(child.factories).toEqual([factory2, factory1]);
     });
 
     describe('.extend()', () => {
       it('should extend di-inherited differs', () => {
-        const parent = new IterableDiffers([factory1]);
+        const differ = new IterableDiffers([factory1]);
         const injector =
-            Injector.create({providers: [{provide: IterableDiffers, useValue: parent}]});
+            Injector.create({providers: [{provide: IterableDiffers, useValue: differ}]});
         const childInjector =
             Injector.create({providers: [IterableDiffers.extend([factory2])], parent: injector});