SPRINGFIELD — Gov. Bruce Rauner said Wednesday he wants to banish a requirement that nonunion public school teachers pay union fees — the Republican's latest swipe at public sector unions he blames for worsening the state's financial woes.Rauner already has sued in federal court to stop what he calls "forced union dues collection" from state government workers, an issue that sent unions to state court in their own action against the move.Speaking in downtown Springfield, the Republican said he …