SAN FRANCISCO, March 4 : Amazon on Tuesday confirmed it laid off staff across its robotics unit, with at least 100 white-collar jobs affected, two people familiar with the matter told Reuters. This comes after a January cut of about 16,000 jobs with the company at the time hinting layoffs would continue. The division axed on Tuesday is responsible for designing robots and other conveyances for automation, primarily in warehouses. "We regularly review our organizations to make sure teams are