Hong Kong’s airport is set to handle 2 million fewer travellers this year than in 2018, as it feels the effects of anti-government protests in the city, according to a revised official forecast.The unrest-related slump is particularly significant given that the travel hub’s passenger numbers had been growing in the first half of the year – up 1.03 million in the year to July against the same period of 2018.Michael Yuen, general manager for airport and industry collaboration at Hong Kong…