Issue #3238915: Refactor (if feasible) uses of the jQuery ready function to use VanillaJS

core/includes/bootstrap.inc

@@ -475,14 +475,6 @@ function drupal_static_reset($name = NULL) {
     case 'taxonomy_vocabulary_get_names':
       @trigger_error("Calling drupal_static_reset() with 'taxonomy_vocabulary_get_names' as argument is deprecated in drupal:9.3.0 and is removed from drupal:10.0.0. There is no replacement for this usage. See https://www.drupal.org/node/3039041", E_USER_DEPRECATED);
       break;
-
-    case 'Drupal\book\BookManager::bookSubtreeData':
-    case 'Drupal\book\BookManager::bookTreeAllData':
-    case 'Drupal\book\BookManager::doBookTreeBuild':
-      @trigger_error("Calling drupal_static_reset() with '{$name}' as argument is deprecated in drupal:9.3.0 and is removed in drupal:10.0.0. Use \Drupal::service('book.memory_cache')->deleteAll() instead. See https://www.drupal.org/node/3039439", E_USER_DEPRECATED);
-      \Drupal::service('book.memory_cache')->deleteAll();
-      break;
-
   }
   drupal_static($name, NULL, TRUE);
 }