“Seinfeld” star Jason Alexander said he hasn’t heard from Jerry Seinfeld about a possible reunion or reboot of the hit NBC sitcom. “There is only one reason for that rumor. Apparently, at the end of some stand-up thing, [Seinfeld] went, ‘Larry [David] and I are thinking of something,'” Alexander told “Extra” on Monday. “Good for you. I don’t know anything about it… No one called me. Apparently, they don’t need George,” he joked.