diff --git a/src/app/authentication.guard.ts b/src/app/authentication.guard.ts
index cec297d1bb377e163c193e08af9f23227feccee4..4e4f004072101b72a224b54a4236be5b33d5202d 100644
--- a/src/app/authentication.guard.ts
+++ b/src/app/authentication.guard.ts
@@ -1,6 +1,5 @@
 import { Injectable } from '@angular/core';
 import { CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, Router } from '@angular/router';
-import { Observable } from 'rxjs/Observable';
 import { AuthenticationService } from './authentication.service';
 import 'rxjs/add/operator/map';
 import 'rxjs/add/observable/of';
diff --git a/src/app/authentication.interceptor.ts b/src/app/authentication.interceptor.ts
index 1185fe4a00749c227b55f2d5313e1ec8d1b331a2..071cba6ae663016ab49bd4fcf16ead90792b2df7 100644
--- a/src/app/authentication.interceptor.ts
+++ b/src/app/authentication.interceptor.ts
@@ -40,5 +40,4 @@ export class AuthenticationInterceptor implements HttpInterceptor {
       return next.handle(req);
     }
   }
-
 }
diff --git a/src/app/authentication.service.ts b/src/app/authentication.service.ts
index 7f98cf3bf5da5ad74cac141a3dd75d91057955dd..2d8b5ccc9a7b95c71c895140fc19ff838c19a72a 100644
--- a/src/app/authentication.service.ts
+++ b/src/app/authentication.service.ts
@@ -7,7 +7,6 @@ import { DataStoreService } from './data-store.service';
 import { HttpClient, HttpHeaders } from '@angular/common/http';
 import { ClientAuthentication } from './client-authentication';
 
-// TODO: connect to API
 @Injectable()
 export class AuthenticationService {
   private readonly STORAGE_KEY: string = 'USER';