fix imports for 8.6.5

Author: pepeiborra

Diff for: ghcide/bench/lib/Experiments.hs

@@ -24,7 +24,8 @@ module Experiments
 ) where
 import           Control.Applicative.Combinators (skipManyTill)
 import           Control.Exception.Safe          (IOException, handleAny, try)
-import           Control.Monad.Extra
+import Control.Monad.Extra
+    ( forM_, void, unless, forM, (&&^), allM, whenJust )
 import           Control.Monad.Fail
 import           Control.Monad.IO.Class
 import           Data.Aeson                      (Value (Null), toJSON)