Remove extraneous response_obj

actionpack/lib/action_controller/abstract/base.rb

@@ -13,7 +13,6 @@ def initialize(message = nil)
 
   class Base
     attr_internal :response_body
-    attr_internal :response_obj
     attr_internal :action_name
 
     class << self
@@ -63,10 +62,6 @@ def action_methods
 
     abstract!
 
-    def initialize
-      self.response_obj = {}
-    end
-
     def process(action)
       @_action_name = action_name = action.to_s