caching.rb in actionpack-5.0.0.beta1

- old
+ new

@@ -1,16 +1,15 @@
 require 'fileutils'
 require 'uri'
-require 'set'
 
 module ActionController
   # \Caching is a cheap way of speeding up slow applications by keeping the result of
   # calculations, renderings, and database calls around for subsequent requests.
   #
   # You can read more about each approach by clicking the modules below.
   #
-  # Note: To turn off all caching, set
+  # Note: To turn off all caching provided by Action Controller, set
   #   config.action_controller.perform_caching = false
   #
   # == \Caching stores
   #
   # All the caching stores from ActiveSupport::Cache are available to be used as backends
@@ -44,10 +43,9 @@
         def cache_configured?
           perform_caching && cache_store
         end
     end
 
-    include RackDelegation
     include AbstractController::Callbacks
 
     include ConfigMethods
     include Fragments
 