SAN FRANCISCO (AP) — Sidewalks once teeming with tents, tarps and people passed out next to heaps of trash have largely disappeared from great swathes of San Francisco, a city widely known for its visible homeless population. The number of people sleeping outdoors dropped to under 3,000 in January, the lowest the city has recorded in a decade, according to a federal count. And that figure has likely dropped even lower since Mayor London Breed — a Democrat in a difficult reelection fight this November — started ramping up enforcement of anti-camping laws in August following a U.S. Supreme Court decision.