By Michael S. Derby April 20 (Reuters) - Federal Reserve Chair nominee Kevin Warsh has pledged to divest from a foreign-oriented investment fund if confirmed to ‌lead the U.S. central bank, according to an updated financial disclosure filing. In ‌a filing dated April 17 that amended an original filing on April 10, Warsh told the ​Fed's ethics officer, "I will divest my interests in iShares S&P/TSX 60 Index (XIU)" if confirmed to succeed Fed Chair Jerome Powell in the central bank's top job. Warsh, a fina ...