CHARLOTTE, N.C. — After beingremoved from a Greenville movie theater, the Rev. William J. Barber II is calling for reforms to increase accessibility for people with disabilities. In a news conference on Friday, Barber said managers at the AMC Fire Tower 12 called the police on him on Tuesday after a dispute about his use of a specialized chair in the theater. The civil-rights activist said he uses the chair everywhere to alleviate pain caused by his disability. “For more than 30 years now I’ve suffered from a form of arthritis that’s rare, but one of the most dangerous forms, debilitating form…