remove useless trim

Signed-off-by: Rudi Grinberg <[email protected]>

Author: rgrinberg

src/dune_engine/vcs.ml

@@ -142,9 +142,7 @@ let describe =
   @@ make_fun "vcs-describe"
        ~doc:"Obtain a nice description of the tip from the vcs"
        ~output:(Simple (module Option_output (String)))
-       ~git:(fun t ->
-         run_git t [ "describe"; "--always"; "--dirty" ]
-         |> Fiber.map ~f:(Option.map ~f:String.trim))
+       ~git:(fun t -> run_git t [ "describe"; "--always"; "--dirty" ])
        ~hg:(fun x ->
          let open Fiber.O in
          let+ res = hg_describe x in