New York CNN — General Motors is pulling the plug on its efforts to develop a fleet of driverless taxis and will focus on driver-assistance features that require a driver to be ready to take control of the car, the company said Tuesday. GM is dropping robotaxi efforts “given the considerable time and resources that would be needed to scale the business, along with an increasingly competitive robotaxi market,” the company said in a statement. The Detroit-based automaker’s robotaxi efforts had bee...