fix ember 3.x tests

Author: mansona

test-app-3.x/app/controllers/index.js

@@ -2,9 +2,7 @@ import { action, set } from '@ember/object';
 import { dependentKeyCompat } from '@ember/object/compat';
 import { tracked } from '@glimmer/tracking';
 import Controller from '@ember/controller';
-import * as emberService from '@ember/service';
-
-const service = emberService.service ?? emberService.inject;
+import { inject as service } from '@ember/service';
 
 export default class Index extends Controller {
   @service moment;