diff --git a/core/lib/Drupal/Core/Menu/LocalActionManager.php b/core/lib/Drupal/Core/Menu/LocalActionManager.php
index 3dc6692..129998e 100644
--- a/core/lib/Drupal/Core/Menu/LocalActionManager.php
+++ b/core/lib/Drupal/Core/Menu/LocalActionManager.php
@@ -7,7 +7,6 @@
 
 namespace Drupal\Core\Menu;
 
-use Drupal\Component\Plugin\Discovery\DerivativeDiscoveryDecorator;
 use Drupal\Core\Access\AccessManagerInterface;
 use Drupal\Core\Cache\CacheBackendInterface;
 use Drupal\Core\Extension\ModuleHandlerInterface;
diff --git a/core/modules/system/tests/modules/menu_test/menu_test.links.task.yml b/core/modules/system/tests/modules/menu_test/menu_test.links.task.yml
index 4afb88d..c014ebf 100644
--- a/core/modules/system/tests/modules/menu_test/menu_test.links.task.yml
+++ b/core/modules/system/tests/modules/menu_test/menu_test.links.task.yml
@@ -91,8 +91,3 @@ menu_test.router_test4:
   route_name: menu_test.router_test4
   base_route: menu_test.router_test1
   class: \Drupal\menu_test\Plugin\Menu\LocalTask\TestTaskWithUserInput
-
-menu_test.router_test_dynamic:
-  route_name: menu_test.router_test5
-  base_route: menu_test.router_test1
-  deriver: Drupal\menu_test\Plugin\Derivative\LocalTaskTestWithUnsafeTitle