update modrtthread.c

port/modrtthread.c

@@ -56,12 +56,12 @@ STATIC mp_obj_t mod_stacks_analyze(void) {
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_0(mod_stacks_analyze_obj, mod_stacks_analyze);
 
-STATIC mp_obj_t os_sync(void) {
-    //TODO
-    MP_RTT_NOT_IMPL_PRINT;
-    return mp_const_none;
-}
-MP_DEFINE_CONST_FUN_OBJ_0(mod_os_sync_obj, os_sync);
+//STATIC mp_obj_t os_sync(void) {
+//    //TODO
+//    MP_RTT_NOT_IMPL_PRINT;
+//    return mp_const_none;
+//}
+//MP_DEFINE_CONST_FUN_OBJ_0(mod_os_sync_obj, os_sync);
 
 STATIC mp_obj_t mp_os_mount(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
     //TODO