A Hebrew teacher who alleges she was fired because she is disabled cannot pursue a discrimination case against her former employer, a federal appeals court ruled.The 7th U.S. Circuit Court of Appeals last week declined to revive the lawsuit Miriam Grussgott filed under the Americans with Disabilities Act against the Milwaukee Jewish Day School.The court did not rule on the merits of Grussgott’s contention that cognitive problems related to a brain tumor — problems she maintains would not have prevented her from …