remove hardcoded translation

customize.dist/login.js

@@ -535,8 +535,7 @@ define([
                                 });
                                 break;
                             case 'E_RESTRICTED':
-                                Messages.register_restrictedError = "Registration is restricted on this instance"; // XXX
-                                UI.errorLoadingScreen(Messages.register_restrictedError); // XXX
+                                UI.errorLoadingScreen(Messages.register_registrationIsClosed);
                                 break;
                             default: // UNHANDLED ERROR
                                 hashing = false;

customize.dist/pages/register.js

@@ -31,10 +31,9 @@ define([
         };
 
         if (Config.restrictRegistration) {
-            Msg.register_closed = "This instance does not allow registration at the moment."; // XXX
             return frame([
                 h('div.cp-restricted-registration', [
-                    h('p', Msg.register_closed),
+                    h('p', Msg.register_registrationIsClosed),
                 ])
             ]);
         }

www/register/main.js

@@ -15,7 +15,6 @@ define([
     'css!/bower_components/components-font-awesome/css/font-awesome.min.css',
 ], function ($, Login, Cryptpad, Test, Cred, UI, Util, Realtime, Constants, Feedback, LocalStore, h) {
     var Messages = Cryptpad.Messages;
-    Messages.register_registrationIsClosed = "REGISTRATION IS CLOSED ON THIS INSTANCE."; // XXX
     $(function () {
         if (LocalStore.isLoggedIn()) {
             // already logged in, redirect to drive