iGaming Business – US gaming and lottery technology firm Scientific Games has gained approval from the Nevada Gaming Commission for its acquisition of slot machine provider WMS Industries, but social gaming company Zynga has withdrawn its application for an interactive gaming licence in the US state. The acquisition deal was first approved by WMS stockholders in May of this year and is expected to be completed this autumn, subject to the approval of gaming regulatory authorities and customary closing conditions. “We are pleased to have received unanimous approval from the Nevada Gaming Commission and thank the Commission and the Nevada…