clean up imports

Author: krawaller

src/services/authservice.ts

@@ -10,7 +10,6 @@ using any other part of Firebase.
 import { Injectable } from '@angular/core';
 
 import * as firebase from 'firebase/app';
-import {AuthCredential, UserCredential} from '@firebase/auth-types';
 import 'firebase/auth';
 
 firebase.initializeApp({

src/services/battleservice.ts

@@ -11,7 +11,7 @@ import { Injectable } from '@angular/core';
 
 import { GithubService } from './githubservice';
 
-import { Observable, of, forkJoin } from 'rxjs';
+import { of, forkJoin } from 'rxjs';
 import { map } from 'rxjs/operators';
 
 @Injectable()

src/services/githubservice.ts

@@ -7,7 +7,7 @@ The functionality to get the list of repos for a specific user is somewhat compl
 since the list from Github is paginated, hence the extra stream juggling.
 */
 
-import { Injectable, EventEmitter } from '@angular/core';
+import { Injectable } from '@angular/core';
 import { HttpClient, HttpResponse } from '@angular/common/http';
 
 import { Observable, of } from 'rxjs';