A bevy of Royal Dutch Shell’s top clean energy executives picked up and resigned from the energy giant. They quit shortly before Shell was scheduled to announce its forward clean energy strategy. The financial press intimated that these executives left because the oil giant was moving too slowly to distance itself from its legacy oil and gas businesses. More resignations were supposedly on the way. We are not privy to inside information regarding these highly publicized departures but we are not totally surprised either. We’ve seen…