Drop expires argument from call to @data in MemCacheStore so it works with memcache-client and memcached gems, as advertised [#3672 state:resolved]

Signed-off-by: wycats <wycats@gmail.com>

activesupport/lib/active_support/cache/mem_cache_store.rb

@@ -91,7 +91,7 @@ module ActiveSupport
 
       def delete(key, options = nil) # :nodoc:
         super do
-          response = @data.delete(key, expires_in(options))
+          response = @data.delete(key)
           response == Response::DELETED
         end
       rescue MemCache::MemCacheError => e

activesupport/test/caching_test.rb

@@ -333,6 +333,12 @@ uses_memcached 'memcached backed store' do
       assert_equal 'bat', @cache.read('baz')
       assert_equal nil, @cache.read('foo')
     end
+
+    def test_delete_should_only_pass_key_to_data
+      key = 'foo'
+      @data.expects(:delete).with(key)
+      @cache.delete(key)
+    end
   end
 
   class CompressedMemCacheStore < ActiveSupport::TestCase