AirAsia chief Tony Fernandes has ruled out any involvement with Malaysia’s ailing national airline, which is at risk of being sold or shut down, saying the profitable budget airline he co-founded is focused on growing organically and speeding up its push to become a digital enterprise.Fernandes – group chief executive officer of Southeast Asia’s largest budget carrier, which flew some 80 million passengers last year – was asked about Malaysia Airlines (MAS) as Prime Minister Mahathir Mohamad on…