Core/GameObject: Remove summoned game objects from the map after calling SetSpawnedByDefault(false) (#23120)

Closes #23115

(cherry picked from commit 5f04c829a8)

src/server/game/Entities/GameObject/GameObject.cpp

@@ -919,11 +919,10 @@ void GameObject::Update(uint32 diff)
             if (!m_respawnDelayTime)
                 return;
 
-            // ToDo: Decide if we should properly despawn these. Maybe they expect to be able to manually respawn from script?
             if (!m_spawnedByDefault)
             {
                 m_respawnTime = 0;
-                DestroyForNearbyPlayers(); // old UpdateObjectVisibility()
+                Delete();
                 return;
             }