Advocates for the homeless are calling on Chicago and municipalities across the state to get rid of ordinances and policies against panhandling.A coalition of groups has argued restrictions in 15 municipalities dotting the entire state violate free speech.In letters to the towns sent Tuesday, the groups cite a 3-year-old U.S. Supreme Court decision that heightened scrutiny on speech regulations, including ones that restrict panhandling.Since the ruling in Reed v. Town of Gilbert, at least 26 panhandling bans have been …