Millionaire Shark Tankjudge Kevin O’Leary isn’t a fan of the shift to a four-day workweek, laughing off the idea in a Fox News appearance. Instead, he said in today’s modern workplace, everything is project-based, and tasks need to be completed by their deadline: “There’s no such thing as a workweek anymore.” If you have dreams of never working Fridays again, you may want to lower your expectations—at least if you work for Mr. Wonderful. Shark T…