Sam Altman, CEO of OpenAI, speaks at the company's DevDay conference in San Francisco on Tuesday. Bloomberg/Getty Images David Robinson, a leader on OpenAI's Safety Systems team, has resigned from the company.An OpenAI spokesperson told Business Insider on Friday that Robinson left last week, marking yet another moment of upheaval in the company's safety ranks. Robinson had previously led the company's policy planning.Robinson worked on safety transparency at the company, including helping to de...