Core/Auras: restrict target map update only to area auras as player requires to have auras registered on load

src/server/game/Spells/Auras/SpellAuras.cpp

@@ -565,10 +565,6 @@ void Aura::UpdateTargetMap(Unit* caster, bool apply)
 
     m_updateTargetMapInterval = UPDATE_TARGET_MAP_INTERVAL;
 
-    // skip update if owner is not in world!
-    if (!GetOwner()->IsInWorld())
-        return;
-
     // fill up to date target list
     //                 target, effMask
     std::unordered_map<Unit*, uint8> targets;