There's no occasion to it, and that seems about right. As far too many of us know, Jay Leno, who has been parked weeknights at 10 p.m. since September, is moving back to "The Tonight Show," the job he left at the end of May. When he returns from the canceled "The Jay Leno Show" to his former chair, after the Olympics, it will be as if the last eight months had never happened.