COLUMBUS, Ohio — A federal judge will resign his seat as an Ohio State University trustee and teach two semesters of law school classes without pay to resolve an ethics investigation over his law school teaching job, under an agreement announced Thursday. Judge Algenon Marbley acknowledged the pay he received for teaching from 2007 through February ran counter to state Ethics Commission advisory rulings and violated state law, according to the agreement. Although Marbley could have been charged with a crime …