Providence officials have revoked a nightclub’s license after a shooting in the club that wounded two men last month. The Providence Board of Licenses voted unanimously Thursday to revoke Club Karma’s license, after having closed the club temporarily after the shootings. Club Karma’s owners said they plan to appeal the decision to the state Department of Business Regulation. Co-owner Peter Petrarca said that the board’s decision was unfair and that other city clubs have worse safety records. He said his club did everything it could to provide a safe environment. Two reputed gang members from Massachusetts were wounded when gunfire erupted at the club Jan. 25.