diff --git a/apps/systemtags/appinfo/app.php b/apps/systemtags/appinfo/app.php
index 039df2ac9f..2c095753ce 100644
--- a/apps/systemtags/appinfo/app.php
+++ b/apps/systemtags/appinfo/app.php
@@ -21,8 +21,6 @@
  *
  */
 
-use OCA\SystemTags\Activity\Extension;
-use OCA\SystemTags\Activity\Listener;
 use OCP\SystemTag\ManagerEvent;
 use OCP\SystemTag\MapperEvent;
 
@@ -46,7 +44,7 @@ $eventDispatcher->addListener(
 	}
 );
 
-$managerListener = function(ManagerEvent $event) use ($activityManager) {
+$managerListener = function(ManagerEvent $event) {
 	$application = new \OCP\AppFramework\App('systemtags');
 	/** @var \OCA\SystemTags\Activity\Listener $listener */
 	$listener = $application->getContainer()->query('OCA\SystemTags\Activity\Listener');
@@ -57,7 +55,7 @@ $eventDispatcher->addListener(ManagerEvent::EVENT_CREATE, $managerListener);
 $eventDispatcher->addListener(ManagerEvent::EVENT_DELETE, $managerListener);
 $eventDispatcher->addListener(ManagerEvent::EVENT_UPDATE, $managerListener);
 
-$mapperListener = function(MapperEvent $event) use ($activityManager) {
+$mapperListener = function(MapperEvent $event) {
 	$application = new \OCP\AppFramework\App('systemtags');
 	/** @var \OCA\SystemTags\Activity\Listener $listener */
 	$listener = $application->getContainer()->query('OCA\SystemTags\Activity\Listener');