Minor fix for #2827 , thank you for reporting

L2_GameServer/java/net/sf/l2j/gameserver/taskmanager/DecayTaskManager.java

@@ -21,7 +21,6 @@ import java.util.logging.Logger;
 import javolution.util.FastMap;
 import net.sf.l2j.gameserver.ThreadPoolManager;
 import net.sf.l2j.gameserver.model.L2Character;
-import net.sf.l2j.gameserver.model.actor.instance.L2RaidBossInstance;
 
 /**
  * @author la2