Merge pull request #128 from madnight/patch-1

Remove unused CPP extension from Core.hs

src/XMonad/Core.hs

@@ -1,5 +1,5 @@
 {-# LANGUAGE ExistentialQuantification, FlexibleInstances, GeneralizedNewtypeDeriving,
-             MultiParamTypeClasses, TypeSynonymInstances, CPP, DeriveDataTypeable #-}
+             MultiParamTypeClasses, TypeSynonymInstances, DeriveDataTypeable #-}
 
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