[Performance] Fixed a large overhead issue where every single NPC in a zone was checking to depop themselves

as a swarm pet every 3ms regardless of being a swarm pet or not. Swarm pets now check to depop only when their timer is up

zone/npc.cpp

@@ -2557,6 +2557,7 @@ void NPC::ClearLastName()
 
 void NPC::DepopSwarmPets()
 {
+
 	if (GetSwarmInfo()) {
 		if (GetSwarmInfo()->duration->Check(false)){
 			Mob* owner = entity_list.GetMobID(GetSwarmInfo()->owner_id);