backend.rb in spree_backend-4.0.0.beta

- old
+ new

@@ -1,13 +1,14 @@
 require 'rails/all'
 require 'jquery-rails'
 require 'jquery-ui-rails'
-require 'deface'
 require 'select2-rails'
+require 'bootstrap'
+require 'glyphicons'
+require 'popper_js'
 
 require 'spree_core'
 require 'spree_api'
 
-require 'spree/responder'
 require 'spree/backend/action_callbacks'
 require 'spree/backend/callbacks'
 require 'spree/backend/engine'