Disable old repl example which caused warnings

src/repl-example/repl-example.ml

@@ -2,6 +2,7 @@
 open Curses
 open Readline
 
+(*
 let main1 () =
   let (Some message) = Readline.readline() in
   let main_window = initscr () in
@@ -11,7 +12,7 @@ let main1 () =
   refresh();
   Unix.sleep 3;
   endwin()
-
+*)
 
 let main2 () =
   let redraw() =