General Motors Co.’s Cruise self-driving car unit will exit the robotaxi business, a retreat from a market that proved costly and full of reputational pitfalls for the automaker.Cruise and GM’s technical teams will be combined into a single effort focused on developing autonomous and advanced driver safety technology for future models sold by GM, according to a statementBloomberg Terminal Tuesday. GM said it will no longer fund robotaxi development work “given the considerable time and resources...