test(material/radio): clean up unnecessary imports in tests

Removes imports from tests that aren't necessary anymore, because we're using standalone.

Author: crisbeto

src/material/radio/radio.spec.ts

@@ -12,28 +12,6 @@ import {
 } from './index';
 
 describe('MatRadio', () => {
-  beforeEach(waitForAsync(() => {
-    TestBed.configureTestingModule({
-      imports: [
-        MatRadioModule,
-        FormsModule,
-        ReactiveFormsModule,
-        DisableableRadioButton,
-        FocusableRadioButton,
-        RadiosInsideRadioGroup,
-        RadioGroupWithNgModel,
-        RadioGroupWithFormControl,
-        StandaloneRadioButtons,
-        InterleavedRadioGroup,
-        TranscludingWrapper,
-        RadioButtonWithPredefinedTabindex,
-        RadioButtonWithPredefinedAriaAttributes,
-        RadiosInsidePreCheckedRadioGroup,
-        PreselectedRadioWithStaticValueAndNgIf,
-      ],
-    });
-  }));
-
   describe('inside of a group', () => {
     let fixture: ComponentFixture<RadiosInsideRadioGroup>;
     let groupDebugElement: DebugElement;
@@ -1034,7 +1012,6 @@ describe('MatRadioDefaultOverrides', () => {
   describe('when MAT_RADIO_DEFAULT_OPTIONS overridden', () => {
     beforeEach(waitForAsync(() => {
       TestBed.configureTestingModule({
-        imports: [MatRadioModule, FormsModule, DefaultRadioButton, RadioButtonWithColorBinding],
         providers: [
           {
             provide: MAT_RADIO_DEFAULT_OPTIONS,

src/material/radio/testing/radio-harness.spec.ts

@@ -11,10 +11,6 @@ describe('radio harness', () => {
   let loader: HarnessLoader;
 
   beforeEach(() => {
-    TestBed.configureTestingModule({
-      imports: [MatRadioModule, ReactiveFormsModule, MultipleRadioButtonsHarnessTest],
-    });
-
     fixture = TestBed.createComponent(MultipleRadioButtonsHarnessTest);
     fixture.detectChanges();
     loader = TestbedHarnessEnvironment.loader(fixture);