diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index b33cf96..a0849b1 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -1085,45 +1085,3 @@ function system_schema() {
 
   return $schema;
 }
-
-/**
- * Ensures that system.site:site_front, site_403 and site_404 start with a slash.
- */
-function system_update_8000() {
-  /** @var \Drupal\Core\Config\ConfigFactoryInterface $config_factory */
-  $config_factory = \Drupal::service('config.factory');
-  $config = $config_factory->get('system.site');
-
-  if (($page_front = $config->get('page.front')) && $page_front[0] !== '/') {
-    $page_front = '/' . $page_front;
-    $config->set('page.front', $page_front);
-  }
-
-  if (($page_403 = $config->get('page.403')) && $page_403[0] !== '/') {
-    $page_403 = '/' . $page_403;
-    $config->set('page.403', $page_403);
-  }
-
-  if (($page_404 = $config->get('page.404')) && $page_404[0] !== '/') {
-    $page_404 = '/' . $page_404;
-    $config->set('page.404', $page_404);
-  }
-}
-
-/**
- * Updates {url_alias} to append '/'.
- */
-function system_update_8001() {
-  $query = \Drupal::database()->update('url_alias');
-
-  if (\Drupal::database()->databaseType() !== 'sqlite') {
-    $query->expression('source', "concat('/', source)");
-    $query->expression('alias', "concat('/', alias)");
-  }
-  else {
-    $query->expression('source', "source || '/'");
-    $query->expression('alias', "alias || '/'");
-  }
-
-  $query->execute();
-}