test(ivy): update root causes for @angular/common TestBed failures (#27322)

PR Close #27322

packages/common/test/directives/ng_component_outlet_spec.ts

@@ -91,7 +91,6 @@ describe('insert/remove', () => {
        expect(fixture.nativeElement).toHaveText('bar');
      }));
 
-  fixmeIvy('FW-642: ASSERTION ERROR: Slot should have been initialized to NO_CHANGE') &&
   it('should use the injector, if one supplied', async(() => {
        let fixture = TestBed.createComponent(TestComponent);