Remove useless notification function

src/app/components/creator/content-list/content-list.component.ts

@@ -85,10 +85,6 @@ export class ContentListComponent implements OnInit {
     this.isLoading = false;
   }
 
-  notAvailable() {
-    this.notificationService.show('This feature has not been implemented yet!');
-  }
-
   findIndexOfSubject(subject: string): number {
     let index = -1;
     for (let i = 0; i < this.contents.length; i++) {