A federal judge Thursday threw out claims of computer fraud and trade secret violations leveled against a search engine that purportedly swiped coupon codes from a competitor’s website.In a written opinion, U.S. District Judge Thomas M. Durkin held CouponCabin Inc. did not adequately allege search engine’s PriceTrace LLC violated the federal Computer Fraud and Abuse Act and the Illinois Trade Secrets Act.Durkin granted PriceTrace’s motion to dismiss those claims from the lawsuit CouponCabin filed against …