If a bill introduced this week intending to make it easier for the state’s public universities to fire professors by abolishing tenure ever becomes law, it would make Iowa an anomaly in banning a widely accepted practice of ensconcing academic freedoms on campus.The Republican senator from Urbandale sponsoring the bill, Brad Zaun, said it’s needed so universities can weed out unfit faculty.“Our regents, and certainly our college presidents, cannot get rid of bad professors,” Zaun said, “and my bill would give them the ability to do that.”