Removed unused deprecation requires.

railties/lib/rails.rb

@@ -10,7 +10,6 @@
 
 require 'rails/application'
 require 'rails/version'
-require 'rails/deprecation'
 
 require 'active_support/railtie'
 require 'action_dispatch/railtie'

railties/lib/rails/configuration.rb

-require 'active_support/deprecation'
 require 'active_support/ordered_options'
 require 'active_support/core_ext/object'
 require 'rails/paths'

railties/lib/rails/generators/active_model.rb

-require 'active_support/deprecation'
-
 module Rails
   module Generators
     # ActiveModel is a class to be implemented by each ORM to allow Rails to

railties/lib/rails/test_unit/testing.rake

 require 'rbconfig'
 require 'rake/testtask'
 require 'rails/test_unit/sub_test_task'
-require 'active_support/deprecation'
 
 task default: :test