diff --git a/core/modules/migrate/src/Plugin/MigratePluginManager.php b/core/modules/migrate/src/Plugin/MigratePluginManager.php
index f6eee47..84f2278 100644
--- a/core/modules/migrate/src/Plugin/MigratePluginManager.php
+++ b/core/modules/migrate/src/Plugin/MigratePluginManager.php
@@ -70,20 +70,4 @@ public function createInstance($plugin_id, array $configuration = array(), Migra
     return $plugin;
   }
 
-  /**
-   * Helper for the plugin type to interface map.
-   *
-   * @return array
-   *   An array map from plugin type to interface.
-   */
-  protected function getPluginInterfaceMap() {
-    return [
-      'destination' => 'Drupal\migrate\Plugin\MigrateDestinationInterface',
-      'process' => 'Drupal\migrate\Plugin\MigrateProcessInterface',
-      'source' => 'Drupal\migrate\Plugin\MigrateSourceInterface',
-      'id_map' => 'Drupal\migrate\Plugin\MigrateIdMapInterface',
-      'entity_field' => 'Drupal\migrate\Plugin\MigrateEntityDestinationFieldInterface',
-    ];
-  }
-
 }
diff --git a/core/modules/migrate_drupal/migrate_drupal.services.yml b/core/modules/migrate_drupal/migrate_drupal.services.yml
index 301ced8..684ecb8 100644
--- a/core/modules/migrate_drupal/migrate_drupal.services.yml
+++ b/core/modules/migrate_drupal/migrate_drupal.services.yml
@@ -1,7 +1,7 @@
 services:
   plugin.manager.migrate.load:
-    class: Drupal\migrate_drupal\Plugin\MigratePluginManager
+    class: Drupal\migrate\Plugin\MigratePluginManager
     arguments: [load, '@container.namespaces', '@cache.discovery', '@module_handler']
   plugin.manager.migrate.cckfield:
-    class: Drupal\migrate_drupal\Plugin\MigratePluginManager
+    class: Drupal\migrate\Plugin\MigratePluginManager
     arguments: [cckfield, '@container.namespaces', '@cache.discovery', '@module_handler']
diff --git a/core/modules/migrate_drupal/src/Plugin/MigratePluginManager.php b/core/modules/migrate_drupal/src/Plugin/MigratePluginManager.php
deleted file mode 100644
index 4a15e77..0000000
--- a/core/modules/migrate_drupal/src/Plugin/MigratePluginManager.php
+++ /dev/null
@@ -1,31 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\migrate_drupal\Plugin\MigratePluginManager.
- */
-
-namespace Drupal\migrate_drupal\Plugin;
-
-use Drupal\migrate\Plugin\MigratePluginManager as BaseMigratePluginManager;
-
-/**
- * Manages migrate_drupal plugins.
- *
- * @see plugin_api
- *
- * @ingroup migration
- */
-class MigratePluginManager extends BaseMigratePluginManager {
-
-  /**
-   * {@inheritdoc}
-   */
-  protected function getPluginInterfaceMap() {
-    return parent::getPluginInterfaceMap() + [
-      'load' => 'Drupal\migrate_drupal\Plugin\MigrateLoadInterface',
-      'cckfield' => 'Drupal\migrate_drupal\Plugin\MigrateCckFieldInterface',
-    ];
-  }
-
-}