cs style fixes

Author: HimmelKreis4865

src/item/ArmorTrimPattern.php

@@ -23,10 +23,6 @@
 
 namespace pocketmine\item;
 
-use function str_ends_with;
-use function strlen;
-use function substr;
-
 enum ArmorTrimPattern : string{
 
 	case COAST = "coast";

src/network/mcpe/handler/ItemStackRequestExecutor.php

@@ -55,7 +55,6 @@
 use pocketmine\network\mcpe\protocol\types\inventory\stackresponse\ItemStackResponse;
 use pocketmine\network\mcpe\protocol\types\inventory\UIInventorySlotOffset;
 use pocketmine\player\Player;
-use pocketmine\Server;
 use pocketmine\utils\AssumptionFailedError;
 use function array_key_first;
 use function count;