BERLIN, Feb 26 (Reuters) - The United States is no longer insisting on a disputed clause in its proposal for reform of global digital taxation rules, removing one of the biggest stumbling blocks to an international agreement, German Finance Minister Olaf Scholz said on Friday. Scholz said in a statement that U.S. Treasury Secretary Janet Yellen told G20 finance ministers that Washington would drop the so-called ‘safe harbor’ clause which had complicated talks on reforming global taxation among OECD member states. (Reporting by Michael Nienaber and Andrea Shalal; editing by Tom Sims)