BEIJING (Reuters) – Dissident Chinese artist Ai Weiwei criticized the government on Thursday for removing from Chinese websites his parody of Korean pop sensation Psy's Gangnam Style video. Ai, a world-renowned artist and China's most prominent dissident, and staff of his company performed Psy's famous horse dance in his Beijing studio and posted the video late on Wednesday to Chinese sites such as "Tudou", the equivalent of the blocked YouTube site. Ai, 55, called the video "Caonima". …