By Geert De Clercq and Mathieu Rosemain PARIS (Reuters) -France’s two biggest private broadcasters, M6 Group and TF1, gave up their merger plan to fend off the rise of U.S. streaming platforms, saying antitrust requests made the deal irrelevant. If successful, the deal would have transformed the French TV landscape and redefined competition rules related to the advertising market, creating a precedent in Europe and potentially paving the way for similar deals among traditional broadcasters. “It appears that only structural remedies involving at the very least the divestment of the TF1 TV chann…