Mr. Levandowski’s termination, effective immediately, comes as a result of his involvement in a legal battle between Uber and Waymo, the self-driving technology unit spun out of Google last year. Waymo claims that Uber is using trade secrets stolen from Google to develop Uber’s self-driving vehicles, a plan aided by Mr. Levandowski, a former longtime Google employee.Uber has long denied the accusations. But when Mr. Levandowski was ordered by a federal judge to hand over evidence and testimony to that end, he asserted his Fifth Amendment rights, seeking to avoid possible criminal charges, according to his lawyers. Uber has been unable to convince Mr. Levandowski to cooperate.