Remove mmorph dependency from servant-server

Author: Amar

servant-server/servant-server.cabal

@@ -56,7 +56,6 @@ library
       , http-types         >= 0.8  && < 0.10
       , network-uri        >= 2.6  && < 2.7
       , mtl                >= 2    && < 3
-      , mmorph             >= 1
       , network            >= 2.6  && < 2.7
       , safe               >= 0.3  && < 0.4
       , servant            == 0.7.*