For Travis Kalanick, the prior CEO of Uber, self-driving cars were an inevitable destiny. For Dara Khosrowshahi, Uber’s current CEO, they are an expensive distraction to get rid of. Uber has a five-year-old self-driving car unit known as Advanced Technologies Group (ATG). The unit has roughly 1,200 employees, many of them in Pittsburgh, Pennsylvania (a self-driving mecca due to the…