SPRINGFIELD — The Illinois Workers’ Compensation Commission pulled back an emergency evidentiary rule it passed this month that would have lowered the burden of proof for essential employees who contracted COVID-19, making it easier for them to receive benefits.The IWCC unanimously voted to repeal the rule during a telemeeting Monday morning.“We are withdrawing the proposed rule because we have to deal with the uncertainty and expense of litigation, which quite frankly could take months if not weeks to …