Expose created_at and updated_at in pipeline entity

app/serializers/pipeline_entity.rb

@@ -64,6 +64,8 @@ class PipelineEntity < Grape::Entity
                                              pipeline.project, pipeline.id)
   end
 
+  expose :created_at, :updated_at
+
   def created_exposure?
     !incremental? || created?
   end

app/serializers/request_aware_entity.rb

@@ -9,10 +9,6 @@ module RequestAwareEntity
     @options.fetch(:request)
   end
 
-  def current_user
-    @options.fetch(:current_user)
-  end
-
   def can?(object, action, subject)
     Ability.allowed?(object, action, subject)
   end