delete old api route

src/server/routes/index.js

@@ -93,7 +93,6 @@ module.exports = function(crowi, app) {
   // markdown admin
   app.get('/admin/markdown'                   , loginRequiredStrictly , adminRequired , admin.markdown.index); // TODO delete
   app.post('/_api/admin/markdown/lineBreaksSetting', loginRequiredStrictly , adminRequired , csrf, form.admin.markdown, admin.markdown.lineBreaksSetting); // change form name
-  app.post('/admin/markdown/xss-setting'      , loginRequiredStrictly , adminRequired , csrf, form.admin.markdownXss, admin.markdown.xssSetting);
   app.post('/admin/markdown/presentationSetting', loginRequiredStrictly , adminRequired , csrf, form.admin.markdownPresentation, admin.markdown.presentationSetting);
 
   // markdown admin