Chore(routing): removed unused RouterModule import (PatrickJS#1384)

Author: dietergoetelen

src/app/app.routes.ts

@@ -1,4 +1,4 @@
-import { Routes, RouterModule } from '@angular/router';
+import { Routes } from '@angular/router';
 import { HomeComponent } from './home';
 import { AboutComponent } from './about';
 import { NoContentComponent } from './no-content';