Fixed duplicate require of common module (#11471)

no-issue

This was a local change that got forgotten in the previous cherrypick

core/server/web/site/app.js

@@ -7,7 +7,6 @@ const common = require('../../lib/common');
 
 // App requires
 const config = require('../../config');
-const common = require('../../lib/common');
 const apps = require('../../services/apps');
 const constants = require('../../lib/constants');
 const storage = require('../../adapters/storage');