Delete useless method show_object

app/controllers/concerns/publisher_controller.rb

@@ -10,11 +10,6 @@ module PublisherController
     render json: LearningObject.where(publisher: publisher)
   end
 
-  # GET /v1/users/1/learning_objects/1
-  def show_object
-    render json: @learning_object
-  end
-
   protected
 
   def publisher