Remove not used requires

actionpack/lib/abstract_controller.rb

 require 'action_pack'
 require 'active_support/rails'
-require 'active_support/core_ext/module/attr_internal'
-require 'active_support/core_ext/module/anonymous'
 require 'active_support/i18n'
 
 module AbstractController

actionpack/lib/abstract_controller/base.rb

 require 'erubis'
-require 'set'
 require 'active_support/configurable'
 require 'active_support/descendants_tracker'
 require 'active_support/core_ext/module/anonymous'
+require 'active_support/core_ext/module/attr_internal'
 
 module AbstractController
   class Error < StandardError #:nodoc:

actionpack/lib/action_dispatch/http/cache.rb

-
 module ActionDispatch
   module Http
     module Cache

actionpack/lib/action_dispatch/http/filter_parameters.rb

-require 'active_support/core_ext/hash/keys'
-require 'active_support/core_ext/object/duplicable'
 require 'action_dispatch/http/parameter_filter'
 
 module ActionDispatch

actionpack/lib/action_dispatch/http/url.rb

 require 'active_support/core_ext/module/attribute_accessors'
-require 'active_support/core_ext/hash/slice'
 
 module ActionDispatch
   module Http

actionpack/lib/action_dispatch/routing.rb

 # encoding: UTF-8
-require 'active_support/core_ext/object/to_param'
-require 'active_support/core_ext/regexp'
-require 'active_support/dependencies/autoload'
 
 module ActionDispatch
   # The routing module provides URL rewriting in native Ruby. It's a way to

actionpack/lib/action_dispatch/routing/mapper.rb

-require 'active_support/core_ext/hash/except'
 require 'active_support/core_ext/hash/reverse_merge'
 require 'active_support/core_ext/hash/slice'
 require 'active_support/core_ext/enumerable'
 require 'active_support/core_ext/array/extract_options'
-require 'active_support/core_ext/module/remove_method'
-require 'active_support/inflector'
+require 'active_support/core_ext/regexp'
 require 'active_support/deprecation'
 require 'action_dispatch/routing/redirection'
 require 'action_dispatch/routing/endpoint'