Remove unused language extensions

haddock-library/src/Documentation/Haddock/Parser.hs

 {-# LANGUAGE OverloadedStrings #-}
-{-# LANGUAGE StandaloneDeriving #-}
-{-# LANGUAGE FlexibleInstances #-}
-{-# LANGUAGE UndecidableInstances #-}
-{-# LANGUAGE IncoherentInstances #-}
 -- |
 -- Module      :  Documentation.Haddock.Parser
 -- Copyright   :  (c) Mateusz Kowalczyk 2013-2014,

haddock-library/test/Documentation/Haddock/ParserSpec.hs

 {-# LANGUAGE OverloadedStrings, FlexibleInstances #-}
-{-# LANGUAGE IncoherentInstances, UndecidableInstances #-}
 {-# OPTIONS_GHC -fno-warn-orphans #-}
 
 module Documentation.Haddock.ParserSpec (main, spec) where