function removeUsedCityPair(fromCity, toCity) {

        for (local i = m_nearCityPairArray.len() - 1 ; i >= 0; --i) {

            if (m_nearCityPairArray[i].isEqual(fromCity, toCity)) {

                m_nearCityPairArray.remove(i);

            }

        }

       

        local removeList = AIList();

        for (local u = m_usedCities.Begin(); m_usedCities.HasNext(); m_usedCities.Next()) {

            local removeTown = true;

            for (local i = 0; i < m_nearCityPairArray.len(); ++i) {

                if (u == m_nearCityPairArray[i].m_cityFrom || u == m_nearCityPairArray[i].m_cityTo) {

                    removeTown = false;

                }

            }

            if (removeTown) {

                AILog.Info("Town " + AITown.GetName(u) + " is being removed (removeUsedCityPair)");

                removeTown.AddItem(u);

            }

        }

       

        m_usedCities.RemoveList(removeList);

    }