BRUSSELS (Reuters) – EU antitrust regulators will decide by March 15 whether to clear Amazon’s proposed acquisition of U.S. movie studio MGM, a European Commission filing showed on Tuesday. The deal would help the world’s largest online retailer to compete better with Netflix and Disney+, bolstering the video streaming service it uses to attract people to subscribe to Amazon Prime, which offers fast shipping and encourages consumers to shop more regularly. Privately held MGM, or Metro Goldwyn Mayer, is the owner of the Epix cable channel and makes popular TV shows including “Fargo”, “Vikings” …