Attorney General Jeff Sessions is rescinding an Obama-era Justice Department letter that asked local courts across the country to be wary of slapping poor defendants with fines and fees to fill their jurisdictions’ coffers, part of a broad rollback of guidance that Sessions believes overreached. It’s the latest move in Sessions’s effort to dramatically reshape the Justice Department by undoing many of the reforms imposed by his predecessors and giving the institution a harder edge. Sessions is revoking 25 previous guidance documents dating back decades and covering topics as diverse as ATF procedures and the Americans With Disabilities Act. In...