The Chicago Cubs and Major League Baseball are suing more than 30 Wrigleyville vendors, accusing them of selling counterfeit merchandise, infringing on trademarks and “deliberately free riding on the success of the Cubs.”In a 32-page complaint filed in federal court on Sept. 22, the plaintiffs accuse seven individual defendants and 30 other unidentified parties of selling knock-off merchandise without a license or permit.The Cubs and the National League are seeking preliminary and permanent injunctive relief to …