remove UpdatePost

src/server/routes/page.js

@@ -136,7 +136,6 @@ module.exports = function(crowi, app) {
   const User = crowi.model('User');
   const Bookmark = crowi.model('Bookmark');
   const PageTagRelation = crowi.model('PageTagRelation');
-  const UpdatePost = crowi.model('UpdatePost');
   const GlobalNotificationSetting = crowi.model('GlobalNotificationSetting');
   const ShareLink = crowi.model('ShareLink');