Issue #3267387: The readiness checker manager service is not longer needed in \Drupal\automatic_updates\Form\UpdaterForm

src/Form/UpdaterForm.php

@@ -88,7 +88,7 @@ class UpdaterForm extends FormBase {
   /**
    * {@inheritdoc}
    */
-  public static function create(ContainerInterface $container): UpdaterForm {
+  public static function create(ContainerInterface $container) {
     return new static(
       $container->get('state'),
       $container->get('automatic_updates.updater'),