diff --git a/core/modules/system/lib/Drupal/system/EventSubscriber/RouteSubscriber.php b/core/modules/system/lib/Drupal/system/EventSubscriber/RouteSubscriber.php
index 1d79878..8858606 100644
--- a/core/modules/system/lib/Drupal/system/EventSubscriber/RouteSubscriber.php
+++ b/core/modules/system/lib/Drupal/system/EventSubscriber/RouteSubscriber.php
@@ -15,7 +15,7 @@
 /**
  * Event subscriber for routes.
  */
-class RouteSubscriber implements EventSubscriberInterface  {
+class RouteSubscriber implements EventSubscriberInterface {
 
   /**
    * Implements EventSubscriberInterface::getSubscribedEvents().
diff --git a/core/modules/system/lib/Drupal/system/Form/ThemeSettingsForm.php b/core/modules/system/lib/Drupal/system/Form/ThemeSettingsForm.php
index 73edc71..3b2644f 100644
--- a/core/modules/system/lib/Drupal/system/Form/ThemeSettingsForm.php
+++ b/core/modules/system/lib/Drupal/system/Form/ThemeSettingsForm.php
@@ -48,14 +48,14 @@ public static function create(ContainerInterface $container) {
   }
 
   /**
-   * Implements \Drupal\Core\Form\FormInterface::getFormID().
+   * {@inheritdoc}
    */
   public function getFormID() {
     return 'system_theme_settings';
   }
 
   /**
-   * Overrides \Drupal\system\SystemConfigFormBase::buildForm().
+   * {@inheritdoc}
    *
    * @param string $theme_name
    *   The theme name.
diff --git a/core/modules/system/system.module b/core/modules/system/system.module
index b4ba67b..e04e2b3 100644
--- a/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -733,7 +733,6 @@ function system_menu() {
   // Theme configuration subtabs.
   $items['admin/appearance/settings/global'] = array(
     'title' => 'Global settings',
-    'route_name' => 'system_theme_settings_global',
     'type' => MENU_DEFAULT_LOCAL_TASK,
   );