Remove invalid dns config notification

The issue is that this value is never really updated unless the box
code is restarted.

Instead, we will fix it to check all domains periodically and send
some email notification.

Fixes cloudron/box#586

src/js/main.js

@@ -71,13 +71,6 @@ angular.module('Application').controller('MainController', ['$scope', '$route',
     };
 
     function runConfigurationChecks() {
-        // warn user if dns config is not working (the 'configuring' flag detects if configureWebadmin is 'active')
-        if (!$scope.status.webadminStatus.configuring && !$scope.status.webadminStatus.dns) {
-            var dnsActionScope = $scope.$new(true);
-            dnsActionScope.action = '/#/domains';
-            Client.notify('Invalid Domain Config', 'Unable to update DNS. Click here to update it.', true, 'error', dnsActionScope);
-        }
-
         if ($scope.config.update && $scope.config.update.box) {
             var updateActionScope = $scope.$new(true);
             updateActionScope.action = '/#/settings';