Shia Saide LaBeouf's days of battling the Decepticons look to be over, with the "Transformers" star saying he has nothing more to offer after three films playing kid next door Sam Witwicky.The 25-year-old American actor said he was through with the action-packed franchise."I'm done," he said at the recent opening of "Transformers: Dark of the Moon" at the Moscow International Film Festival. "I'm sure they will make more of them. It's still a very hot franchise."He Also said: "I love making movies. I love the crew. I love Michael. I love the cast. I love Sam ... but I don't have anything new to contribute, and I don't think there's anywhere to take Sam really."LeBeouf's nerdy character helped one alien race of robots, the Transformers, overpower another race, the evil Decepticons, with Earth as the battleground.Directed by Michael Bay, "Transformers 3" also stars Patrick Dempsey, Frances McDormand, John Malkovich and Victoria's Secret model Rosie Huntington Whitely. Paramount Pictures said the movie earned $37.3 million Wednesday in the United States on its first day a 40 percent drop from its predecessor, "Revenge of the Fallen."