A federal judge has sided with a teacher who claims the school board that removed her as principal destroyed evidence indicating she was discriminated against based on her age. U.S. District Judge James F. Holderman determined the school board of District 89 — which oversees schools in Maywood, Melrose Park and Broadview — committed a bad-faith breach of its duty to maintain recordings of private meetings that involved discussion of the reasons for reassigning nine district principals. As a result …