refactor(google-maps): Removes reference to GoogleMap from MapMarker

Fix issues with linting and merge.

Author: mbehrlich

src/google-maps/google-map/google-map.ts

@@ -21,8 +21,6 @@ import {
 import {BehaviorSubject, combineLatest, Observable, Subject} from 'rxjs';
 import {map, shareReplay, take, takeUntil} from 'rxjs/operators';
 
-import {MapMarker} from '../map-marker/map-marker';
-
 interface GoogleMapsWindow extends Window {
   google?: typeof google;
 }

src/google-maps/map-marker/map-marker.spec.ts

@@ -171,7 +171,6 @@ describe('MapMarker', () => {
     createMarkerConstructorSpy(markerSpy).and.callThrough();
 
     const fixture = TestBed.createComponent(TestApp);
-    const markerComponent = fixture.debugElement.query(By.directive(MapMarker)).componentInstance;
     fixture.detectChanges();
 
     expect(markerSpy.addListener)