BEIJING (Reuters) – The International Olympic Committee (IOC) said on Thursday it was up to the International Ski Federation (FIS) to decide whether to take action in the case of a Belarusian cross-country skier who was barred from competition over what her family said were its political views. Belarusian cross-country skier Darya Dolidovich told Reuters on Tuesday that she and her family had left Belarus because of fears of reprisals by authorities after she was banned from competition, a move her family saw as retribution for their support of the political opposition. Darya Dolidovich is the…