A legal secretary failed to show it was her epilepsy and progressive hearing loss — not her work performance — that led Winston & Strawn LLP to give her a lower-than-expected raise, a federal judge held.In a written opinion last week, U.S. District Judge Harry D. Leinenweber granted summary judgment in favor of Winston & Strawn on the discrimination and retaliation claims Dyhan I. Slaughter brought under the Americans with Disabilities Act.Leinenweber held Slaughter failed to establish a prima facie …