Not only is disgraced cyclist Lance Armstrong no longer officially a Tour de France winner -- he's no longer an Olympic medalist, either. The International Olympic Committee has stripped Armstrong of the bronze medal he won at the 2000 Olympic Games in Sydney, Australia, an IOC spokesman said Thursday. The committee told Armstrong to return it. The move came in advance of a televised interview in which Armstrong is believed to acknowledge for the first time that he used prohibited performance-enhancing drugs in his career. While talk-show host Oprah Winfrey has not released details of exactly what Armstrong said in the recorded…