diff --git a/core/modules/field/field.install b/core/modules/field/field.install
deleted file mode 100644
index 507e971..0000000
--- a/core/modules/field/field.install
+++ /dev/null
@@ -1,31 +0,0 @@
-<?php
-
-/**
- * @file
- * Install, update and uninstall functions for the field module.
- */
-
-/**
- * Removes the stale 'target_bundle' storage setting on entity_reference fields.
- */
-function field_update_8001() {
-  $config = \Drupal::configFactory();
-  /** @var \Drupal\Core\Field\FieldTypePluginManager $field_type_manager */
-  $field_type_manager = \Drupal::service('plugin.manager.field.field_type');
-  $item_class = 'Drupal\Core\Field\Plugin\Field\FieldType\EntityReferenceItem';
-
-  // Iterate on all fields storage.
-  foreach ($config->listAll('field.storage.') as $field_id) {
-    $field_storage = $config->getEditable($field_id);
-    $class = $field_type_manager->getPluginClass($field_storage->get('type'));
-
-    // Deal only with entity reference fields and descendants.
-    if ($class != $item_class && !is_subclass_of($class, $item_class)) {
-      continue;
-    }
-
-    // Remove 'target_bundle' from settings.
-    $field_storage->clear('settings.target_bundle');
-    $field_storage->save(TRUE);
-  }
-}
diff --git a/core/modules/field/src/Tests/Update/EntityReferenceTargetBundleUpdateTest.php b/core/modules/field/src/Tests/Update/EntityReferenceTargetBundleUpdateTest.php
deleted file mode 100644
index bfdfc4d..0000000
--- a/core/modules/field/src/Tests/Update/EntityReferenceTargetBundleUpdateTest.php
+++ /dev/null
@@ -1,53 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\field\Tests\Update\EntityReferenceTargetBundleUpdateTest.
- */
-
-namespace Drupal\field\Tests\Update;
-
-use Drupal\system\Tests\Update\UpdatePathTestBase;
-
-/**
- * Tests that field settings are properly updated during database updates.
- *
- * @group field
- */
-class EntityReferenceTargetBundleUpdateTest extends UpdatePathTestBase {
-
-  /**
-   * {@inheritdoc}
-   */
-  protected function setDatabaseDumpFiles() {
-    $this->databaseDumpFiles = [
-      __DIR__ . '/../../../../system/tests/fixtures/update/drupal-8.bare.standard.php.gz',
-    ];
-  }
-
-  /**
-   * Tests field_update_8001().
-   *
-   * @see field_update_8001()
-   */
-  public function testFieldUpdate8001() {
-    $configFactory = $this->container->get('config.factory');
-
-    // Add the deprecated 'target_bundle' setting to the 'node.field_tags' field
-    // storage config.
-    /** @var \Drupal\Core\Config\Config */
-    $config = $configFactory->getEditable('field.storage.node.field_tags');
-    $config->set('settings.target_bundle', NULL);
-    $config->save(TRUE);
-
-    // Run updates.
-    $this->runUpdates();
-
-    // Reload the config, and check that the 'target_bundle' setting has been
-    // removed.
-    $config = $configFactory->getEditable('field.storage.node.field_tags');
-    $settings = $config->get('settings');
-    $this->assertFalse(array_key_exists('target_bundle', $settings));
-  }
-
-}