Get rid of some duplicate imports

diff --git a/GHC/IOBase.lhs b/GHC/IOBase.lhs
index f50c775..399d8eb 100644 (file)
--- a/GHC/IOBase.lhs
+++ b/GHC/IOBase.lhs
@@ -46,7 +46,7 @@ module GHC.IOBase(
     ExitCode(..),
     throwIO, block, unblock, blocked, catchAny, catchException,
     evaluate,
-    ErrorCall(..), ArithException(..), AsyncException(..),
+    ErrorCall(..),
     BlockedOnDeadMVar(..), BlockedIndefinitely(..), Deadlock(..)
   ) where