correct broken spec

spec/components/distributed_cache_spec.rb

@@ -3,18 +3,6 @@ require 'distributed_cache'
 
 describe DistributedCache do
 
-  def wait_for(&blk)
-    i = 0
-    result = false
-    while !result && i < 300
-      result = blk.call
-      i += 1
-      sleep 0.001
-    end
-
-    result.should == true
-  end
-
   let! :cache1 do
     DistributedCache.new("test")
   end