Now that Boston has dropped out as a potential host city for the 2024 Summer Olympic Games, Los Angeles could be poised to step in its place. The United States Olympic Committee, which in January chose Boston over L.A. as the one U.S. city that would make a bid to the International Olympic Committee, on Monday announced that Boston would end its bid process. "Notwithstanding the promise of the original vision for the bid, and the soundness of the plan developed under Steve Pagliuca, we have not…