old_contents: import Ember from 'ember';
  import FirebaseAdapter from 'emberfire/adapters/firebase';
  
  const {inject, computed} = Ember;
  
  export default FirebaseAdapter.extend({
    firebase: inject.service(),
  });
  
new_contents: import Ember from 'ember';
  import FirebaseAdapter from 'emberfire/adapters/firebase';
  
  const { inject } = Ember;
  
  export default FirebaseAdapter.extend({
    firebase: inject.service(),
  });
  
subject: Remove unused `computed` var in blueprint app adapter