message: refactor(router): Remove unused property in `BrowserViewportScroller`
  The `BrowserViewportScroller` injects but does not use the `ErrorHandler`.
  This commit removes the `ErrorHandler` from the constructor.
  PR Close
diff: @@ -19,7 +19,7 @@ describe('BrowserViewportScroller', () => {
  jasmine.createSpyObj('window', ['history', 'scrollTo', 'pageXOffset', 'pageYOffset']);
  windowSpy.history.scrollRestoration = 'auto';
  documentSpy = jasmine.createSpyObj('document', ['getElementById', 'getElementsByName']);
  - scroller = new BrowserViewportScroller(documentSpy, windowSpy, null!);
  + scroller = new BrowserViewportScroller(documentSpy, windowSpy);
  });
  describe('setHistoryScrollRestoration', () => {
  