By Karen Freifeld NEW YORK (Reuters) – The accounting firm that handled Donald Trump’s company’s financial statements dropped it as a client and said it could no longer stand behind a decade of statements, a court filing showed on Monday. Mazars USA, in a Feb. 9 letter made public on Monday, told the Trump Organization, the former president’s New York-based real estate business, that its financial statements for 2011 through 2020 should no longer be relied on. The disclosure was made as part of New York Attorney General Letitia James’ civil investigation into the Trump Organization, which coul…