Update Session.hs

Author: echatav

squeal-postgresql/src/Squeal/PostgreSQL/Session.hs

@@ -44,7 +44,6 @@ import Control.Monad (MonadPlus(..))
 import Control.Monad.Base (MonadBase(..))
 import Control.Monad.Fix (MonadFix(..))
 import Control.Monad.Catch
-import Control.Monad.IO.Class (MonadIO(..))
 import Control.Monad.Morph
 import Control.Monad.Reader
 import Control.Monad.Trans.Control (MonadBaseControl(..), MonadTransControl(..))