Mayor de Blasio got a scathing rejection from liberal comedian Bill Maher. Hizzoner needs to “get the f—k out” of the 2020 presidential race, Maher said on his HBO show Friday — breaking into song to shoo him out. “And this guy,” Maher condescendingly said, hoisting a photo of de Blasio. “Start spreading the news,” he crooned, “you’re leaving today” — an acerbic take on the Frank Sinatra classic, “New York, New York.” “Look, there’s too many people in this race, right?” Maher said. “I’m going to get rid of ten of them right now.” He ordered Colorado Gov. John...