diff --git a/src/event/Event.php b/src/event/Event.php
index f5ecd17e9a..5977516f35 100644
--- a/src/event/Event.php
+++ b/src/event/Event.php
@@ -26,7 +26,6 @@ declare(strict_types=1);
  */
 namespace pocketmine\event;
 
-use function assert;
 use function get_class;
 
 abstract class Event{
diff --git a/src/event/HandlerList.php b/src/event/HandlerList.php
index c6ffbaac68..80bc844486 100644
--- a/src/event/HandlerList.php
+++ b/src/event/HandlerList.php
@@ -25,7 +25,6 @@ namespace pocketmine\event;
 
 use pocketmine\plugin\Plugin;
 use function array_fill_keys;
-use function in_array;
 use function spl_object_id;
 
 class HandlerList{
diff --git a/src/plugin/PluginManager.php b/src/plugin/PluginManager.php
index 87714d6287..0c109b4a3d 100644
--- a/src/plugin/PluginManager.php
+++ b/src/plugin/PluginManager.php
@@ -25,7 +25,6 @@ namespace pocketmine\plugin;
 
 use pocketmine\event\Event;
 use pocketmine\event\EventPriority;
-use pocketmine\event\HandlerList;
 use pocketmine\event\HandlerListManager;
 use pocketmine\event\Listener;
 use pocketmine\event\plugin\PluginDisableEvent;