Revert "Object#in? also accepts multiple parameters"

This reverts commit ebf69ab1636df74c76332c53bcd3d8494fb91b45.

`in?` must not take multiple parameters because its behavior would be
ambiguous:

    # Test if "B" is included in a list of names with `"B".in?(*names)`:
    names = ["BMorearty"]
    "B".in?(*names)   # => true

    names = ["BMorearty","rubyduo"]
    "B".in?(*names)   # => false

Conflicts:
	activesupport/lib/active_support/core_ext/object/inclusion.rb
	activesupport/test/core_ext/object/inclusion_test.rb

1 files changed, 0 insertions, 10 deletions

diff --git a/activesupport/test/core_ext/object/inclusion_test.rb b/activesupport/test/core_ext/object/inclusion_test.rb
index 22888333f5..478706eeae 100644
--- a/activesupport/test/core_ext/object/inclusion_test.rb
+++ b/activesupport/test/core_ext/object/inclusion_test.rb
@@ -2,16 +2,6 @@ require 'abstract_unit'
 require 'active_support/core_ext/object/inclusion'
 
 class InTest < ActiveSupport::TestCase
-  def test_in_multiple_args
-    assert :b.in?(:a,:b)
-    assert !:c.in?(:a,:b)
-  end
-  
-  def test_in_multiple_arrays
-    assert [1,2].in?([1,2],[2,3])
-    assert ![1,2].in?([1,3],[2,1])
-  end
-  
   def test_in_array
     assert 1.in?([1,2])
     assert !3.in?([1,2])