remove or adjust some comments

customize.dist/pages/register.js

@@ -30,8 +30,8 @@ define([
             ];
         };
 
-        if (Config.restrictRegistration) { // XXX restricted-registration
+        if (Config.restrictRegistration) {
-            Msg.register_closed = "This instance does not allow registration at the moment.";
+            Msg.register_closed = "This instance does not allow registration at the moment."; // XXX
             return frame([
                 h('h4', Msg.register_closed)
             ]);

www/admin/inner.js

@@ -53,7 +53,7 @@ define([
             'cp-admin-update-limit',
             'cp-admin-archive',
             'cp-admin-unarchive',
-            'cp-admin-registration', // XXX restricted-registration
+            'cp-admin-registration',
         ],
         'quota': [ // Msg.admin_cat_quota
             'cp-admin-defaultlimit',