Removed Object#itself as it's implemented in ruby 2.2

activesupport/lib/active_support/core_ext/object.rb

@@ -2,7 +2,6 @@
 require 'active_support/core_ext/object/blank'
 require 'active_support/core_ext/object/duplicable'
 require 'active_support/core_ext/object/deep_dup'
-require 'active_support/core_ext/object/itself'
 require 'active_support/core_ext/object/try'
 require 'active_support/core_ext/object/inclusion'
 

activesupport/lib/active_support/core_ext/object/itself.rb

-class Object
-  # TODO: Remove this file when we drop support for Ruby < 2.2
-  unless respond_to?(:itself)
-    # Returns the object itself.
-    #
-    # Useful for chaining methods, such as Active Record scopes:
-    #
-    #   Event.public_send(state.presence_in([ :trashed, :drafted ]) || :itself).order(:created_at)
-    #
-    # @return Object
-    def itself
-      self
-    end
-  end
-end

activesupport/test/core_ext/object/itself_test.rb

-require 'abstract_unit'
-require 'active_support/core_ext/object'
-
-class Object::ItselfTest < ActiveSupport::TestCase
-  test 'itself returns self' do
-    object = 'fun'
-    assert_equal object, object.itself
-  end
-end