Actor Alec Baldwin revealed that he has “no idea” how a live ammunition round got onto the “Rust” movie set before the fatal shooting last month that left a cinematographer, Halyna Hutchins, dead. During an interview with ABC News, Baldwin also claimed that he didn’t pull the gun’s trigger. The incident, which has not resulted in any criminal charges, is being investigated by authorities in Santa Fe County, New Mexico. “I would never point a gun at anyone and pull a trigger at them,” Baldwin said, according to an excerpt of the televised interview, his first since the shooting. While he did not elaborate, the actor may be suggesting that the gun discharged accidentally. “The trigger wasn’t pulled. I didn’t pull the trigger,” the longtime actor also repeatedly claimed. Baldwin, 63, asserted that he had “no idea” how a live bullet got on the movie set and that it was …