HLint fix

Author: bergmark

benchmarks/AesonMap.hs

@@ -1,5 +1,4 @@
 {-# LANGUAGE FlexibleContexts #-}
-{-# LANGUAGE PackageImports #-}
 {-# LANGUAGE RankNTypes #-}
 
 {-# OPTIONS_GHC -fno-warn-orphans #-}