diff --git a/core/modules/views/src/Plugin/views/sort/MenuHierarchy.php b/core/modules/views/src/Plugin/views/sort/MenuHierarchy.php
deleted file mode 100644
index 2d8a5fc..0000000
--- a/core/modules/views/src/Plugin/views/sort/MenuHierarchy.php
+++ /dev/null
@@ -1,66 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\views\Plugin\views\sort\MenuHierarchy.
- */
-
-namespace Drupal\views\Plugin\views\sort;
-
-use Drupal\views\Views;
-
-/**
- * Sort in menu hierarchy order.
- *
- * Given a field name of 'p' this produces an ORDER BY on p1, p2, ..., p9;
- * and optionally injects multiple joins to {menu_links} to sort by weight
- * and title as well.
- *
- * This is only really useful for the {menu_links} table.
- *
- * @ViewsSort("menu_hierarchy")
- */
-class MenuHierarchy extends SortPluginBase {
-
-  protected function defineOptions() {
-    $options = parent::defineOptions();
-    $options['sort_within_level'] = array('default' => FALSE);
-    return $options;
-  }
-
-  public function buildOptionsForm(&$form, &$form_state) {
-    parent::buildOptionsForm($form, $form_state);
-    $form['sort_within_level'] = array(
-      '#type' => 'checkbox',
-      '#title' => t('Sort within each hierarchy level'),
-      '#description' => t('Enable this to sort the items within each level of the hierarchy by weight and title.  Warning: this may produce a slow query.'),
-      '#default_value' => $this->options['sort_within_level'],
-    );
-  }
-
-  public function query() {
-    $this->ensureMyTable();
-    $max_depth = isset($this->definition['max depth']) ? $this->definition['max depth'] : MENU_MAX_DEPTH;
-    for ($i = 1; $i <= $max_depth; ++$i) {
-      if ($this->options['sort_within_level']) {
-        $definition = array(
-          'table' => 'menu_links',
-          'field' => 'mlid',
-          'left_table' => $this->tableAlias,
-          'left_field' => $this->field . $i
-        );
-        $join = Views::pluginManager('join')->createInstance('standard', $definition);
-
-        $menu_links = $this->query->addTable('menu_links', NULL, $join);
-        $this->query->addOrderBy($menu_links, 'weight', $this->options['order']);
-        $this->query->addOrderBy($menu_links, 'link_title', $this->options['order']);
-      }
-
-      // We need this even when also sorting by weight and title, to make sure
-      // that children of two parents with the same weight and title are
-      // correctly separated.
-      $this->query->addOrderBy($this->tableAlias, $this->field . $i, $this->options['order']);
-    }
-  }
-
-}