Remove unused import

The PureScript compiler warns about unused imports as of 0.7.6.

Author: tfausak

src/Control/Monad/Eff/Exception/Unsafe.purs

@@ -1,7 +1,6 @@
 module Control.Monad.Eff.Exception.Unsafe where
 
 import Prelude
-import Control.Monad.Eff
 import Control.Monad.Eff.Unsafe
 import Control.Monad.Eff.Exception