System.Nix.Hash: Remove unused pragmas and cleanup.

Author: shlevy

hnix-store-core/src/System/Nix/Hash.hs

@@ -1,15 +1,6 @@
 {-|
 Description : Cryptographic hashes for hnix-store.
-Maintainer  : Shea Levy <[email protected]>; Greg Hale <[email protected]>
 -}
-{-# LANGUAGE DataKinds #-}
-{-# LANGUAGE TypeApplications #-}
-{-# LANGUAGE ScopedTypeVariables #-}
-{-# LANGUAGE FlexibleContexts #-}
-{-# LANGUAGE TypeApplications #-}
-{-# LANGUAGE TypeFamilies #-}
-{-# LANGUAGE TypeOperators #-}
-{-# LANGUAGE CPP #-}
 module System.Nix.Hash (
     HNix.Digest
 
@@ -24,4 +15,3 @@ module System.Nix.Hash (
   ) where
 
 import qualified System.Nix.Internal.Hash as HNix
-