Clean up JIT diagnostic logging from pre-compile loop

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

hosts/ocaml/bin/sx_server.ml

@@ -977,8 +977,7 @@ let rec dispatch env cmd =
          | Some cl ->
            l.l_compiled <- Some cl;
            incr count
-         | None ->
-           Printf.eprintf "[jit] pre-compile FAIL: %s\n%!" name)
+         | None -> ())
       | _ -> ()
     ) compiler_fns;
     let dt = Unix.gettimeofday () -. t0 in