Use include? instead of in? for Enumerable#without.

[egilburg]

activesupport/lib/active_support/core_ext/enumerable.rb

@@ -69,7 +69,7 @@ def exclude?(object)
   #   {foo: 1, bar: 2, baz: 3}.without :bar
   #     => {foo: 1, baz: 3}
   def without(*elements)
-    reject { |element| element.in?(elements) }
+    reject { |element| elements.include?(element) }
   end
 end
 

activesupport/test/core_ext/enumerable_test.rb

 require 'abstract_unit'
 require 'active_support/core_ext/array'
 require 'active_support/core_ext/enumerable'
-require 'active_support/core_ext/object/inclusion'
 
 Payment = Struct.new(:price)
 class SummablePayment < Payment