Fix field name

app/assets/javascripts/notes.js

@@ -456,7 +456,7 @@ require('./task_list');
       form.find("#note_line_code").remove();
       form.find("#note_position").remove();
       form.find("#note_type").remove();
-      form.find("#note_in_reply_to_discussion_id").remove();
+      form.find("#in_reply_to_discussion_id").remove();
       form.find('.js-comment-resolve-button').closest('comment-and-resolve-btn').remove();
       return this.parentTimeline = form.parents('.timeline');
     };