Initial Drupal 11 with DDEV setup

web/core/modules/update/update.post_update.php

@@ -0,0 +1,39 @@
+<?php
+
+/**
+ * @file
+ * Post update functions for Update Status.
+ */
+
+use Drupal\Core\Site\Settings;
+
+/**
+ * Implements hook_removed_post_updates().
+ */
+function update_remove_post_updates() {
+  return [
+    'update_post_update_add_view_update_notifications_permission' => '10.0.0',
+    'update_post_update_set_blank_fetch_url_to_null' => '11.0.0',
+  ];
+}
+
+/**
+ * Removes the legacy 'Update Manager' disk cache.
+ */
+function update_post_update_clear_disk_cache(): void {
+  // @see _update_manager_unique_id()
+  $id = substr(hash('sha256', Settings::getHashSalt()), 0, 8);
+  // List of legacy 'Update Manager' cache directories.
+  $directories = [
+    // @see _update_manager_cache_directory()
+    "temporary://update-cache-$id",
+    // @see _update_manager_extract_directory()
+    "temporary://update-extraction-$id",
+  ];
+  foreach ($directories as $directory) {
+    if (is_dir($directory)) {
+      \Drupal::service('file_system')->deleteRecursive($directory);
+    }
+  }
+
+}