Removed definition of fmap in Extend (Either a), this way it will inherit the one from Either's Functor instance.
Removed definition of fmap in Extend (Either a), this way it will inherit the one from Either's Functor instance.

git-svn-id: d58676ab4b72c630679e33fc9c690d0f03588f5c@662 53b5f811-8420-8aa4-35af-336720f271cf

mmhelloworld/frege,mperry/frege,vsts/frege,sjfloat/frege,ppelleti/frege,oppai/frege,scrotty/frege,oppai/frege,mperry/frege,ppelleti/frege,scrotty/frege,scrotty/frege,sjfloat/frege,mperry/frege,mmhelloworld/frege,sjfloat/frege,mmhelloworld/frege,vsts/frege,vsts/frege,ppelleti/frege,oppai/frege