Revert "Mitigate ocaml/ocaml#11737."

This reverts commit c31a33a.

ocaml-lsp-server/src/dune.ml

@@ -818,16 +818,11 @@ let run_loop t =
       match !t with
       | Closed -> Fiber.return None
       | Active active ->
-        if Sys.win32 then
-          (* Mitigate issue ocaml/ocaml#11737; see ocaml/ocaml-lsp#929.
-             Should be reverted as soon as "ocaml 4.14.0" is no longer supported. *)
-          Fiber.return None
-        else
-          let* state = poll active state in
-          (* TODO make this a bit more dynamic. if poll completes fast, wait more,
-             if it's slow, then wait less *)
-          let+ () = Lev_fiber.Timer.sleepf 0.25 in
-          Some state)
+        let* state = poll active state in
+        (* TODO make this a bit more dynamic. if poll completes fast, wait more,
+           if it's slow, then wait less *)
+        let+ () = Lev_fiber.Timer.sleepf 0.25 in
+        Some state)
 
 let run t : unit Fiber.t =
   Fiber.of_thunk (fun () ->