Remove undefined JS var myChoiceDegreeCertainty temporarily

main/exercise/exercise_submit.php

@@ -1265,7 +1265,7 @@ if (!empty($error)) {
                 type:"post",
                 async: false,
                 url: "'.api_get_path(WEB_AJAX_PATH).'exercise.ajax.php?'.api_get_cidreq().'&a=save_exercise_by_now",
-                data: "'.$params.'&type=simple&question_id="+question_id+"&"+my_choice+"&"+hotspot+"&"+remind_list+"&"+myChoiceDegreeCertainty,
+                data: "'.$params.'&type=simple&question_id="+question_id+"&"+my_choice+"&"+hotspot+"&"+remind_list,
                 success: function(return_value) {
                     if (return_value == "ok") {
                         $("#save_for_now_"+question_id).html(\''.Display::return_icon('save.png', get_lang('Saved'), [], ICON_SIZE_SMALL).'\');