By Laura Matthews and Sinéad Carew NEW YORK/LONDON, Feb 23 (Reuters) - Far from being a source of relief, the Supreme Court's takedown of President Donald Trump's tariffs has infused new risks and uncertainties into trade policy, U.S. debt and the dollar. The Court made no decision on refunds, leaving open the possibility of a hole of ‌around $170 billion in U.S. finances. Trump's furious rush to impose replacement levies has already raised hackles in Europe and fresh confusion about trade policy. The ...