Core/Transports: Fixed crash happening during teleporting transports

Closes #11793

src/server/game/Entities/DynamicObject/DynamicObject.cpp

@@ -48,18 +48,6 @@ DynamicObject::~DynamicObject()
     delete _removedAura;
 }
 
-void DynamicObject::CleanupsBeforeDelete(bool finalCleanup /* = true */)
-{
-    WorldObject::CleanupsBeforeDelete(finalCleanup);
-
-    if (Transport* transport = GetTransport())
-    {
-        transport->RemovePassenger(this);
-        SetTransport(NULL);
-        m_movementInfo.transport.Reset();
-    }
-}
-
 void DynamicObject::AddToWorld()
 {
     ///- Register the dynamicObject for guid lookup and for caster
@@ -124,14 +112,11 @@ bool DynamicObject::CreateDynamicObject(uint32 guidlow, Unit* caster, uint32 spe
     Transport* transport = caster->GetTransport();
     if (transport)
     {
-        m_movementInfo.transport.guid = GetGUID();
-
         float x, y, z, o;
         pos.GetPosition(x, y, z, o);
         transport->CalculatePassengerOffset(x, y, z, &o);
         m_movementInfo.transport.pos.Relocate(x, y, z, o);
 
-        SetTransport(transport);
         // This object must be added to transport before adding to map for the client to properly display it
         transport->AddPassenger(this);
     }