Remove map from Prelude hiding list for Mutable.hs

The Mutable module neither defines nor uses anything named map,
and mutable vectors can't exactly be mapped anyway, so there's no
obvious reason to hide Prelude.map.

Author: treeowl

Data/Vector/Mutable.hs

@@ -54,7 +54,7 @@ import qualified Data.Vector.Generic.Mutable as G
 import           Data.Primitive.Array
 import           Control.Monad.Primitive
 
-import Prelude hiding ( length, null, replicate, reverse, map, read,
+import Prelude hiding ( length, null, replicate, reverse, read,
                         take, drop, splitAt, init, tail )
 
 import Data.Typeable ( Typeable )