The billionaire’s departure will change little day-to-day but could be significant for club’s stadium plans Not since a doomed foray into the thorny world of the transfer market has Todd Boehly had any real influence over the day-to-day at Chelsea. The American exits football as a diminished figure four years on, along with his fellow investor Mark Walter, and the first thing to say is that little will change in the Stamford Bridge boardroom just because Boehly has left the scene. Clearlake Cap…