Issue #3183052: Remove non-variable passed by reference

src/EventSubscriber/LayoutBuilderIdsConfigureBlock.php

@@ -30,7 +30,7 @@ class LayoutBuilderIdsConfigureBlock implements EventSubscriberInterface {
     if (in_array($form['#form_id'], ['layout_builder_add_block', 'layout_builder_update_block'], TRUE)) {
 
       // Pull out the layout_builder_id from config.
-      $layout_builder_id = &$event->getFormState()->getFormObject()->getCurrentComponent()->get('layout_builder_id');
+      $layout_builder_id = $event->getFormState()->getFormObject()->getCurrentComponent()->get('layout_builder_id');
 
       // Add the section id to the configure form.
       $form['settings']['layout_builder_id'] = [