test(ivy): run more router tests in CI (#27325)

PR Close #27325

packages/router/test/regression_integration.spec.ts

@@ -9,7 +9,6 @@
 import {CommonModule} from '@angular/common';
 import {Component, ContentChild, NgModule, TemplateRef, Type, ViewChild, ViewContainerRef} from '@angular/core';
 import {ComponentFixture, TestBed, fakeAsync, tick} from '@angular/core/testing';
-import {fixmeIvy} from '@angular/private/testing';
 import {Router} from '@angular/router';
 import {RouterTestingModule} from '@angular/router/testing';