hslua-marshalling: remove redundant import of Data.Semigroup
@@ -37,9 +37,6 @@ import Control.Monad ((<$!>), (<=<))
import Data.ByteString (ByteString)
import Data.List (intercalate)
import HsLua.Core as Lua
-#if !MIN_VERSION_base(4,12,0)
-import Data.Semigroup (Semigroup ((<>)))
-#endif
#if !MIN_VERSION_base(4,13,0)
import Control.Monad.Fail (MonadFail (..))
#endif
