By Jonathan Stempel NEW YORK (Reuters) -A U.S. judge on Friday threw out a former Deutsche Bank AG trader’s conviction for conspiring to manipulate the global lending benchmark Libor, after an appeals court tossed the convictions of two former colleagues he testified against. U.S. District Judge Paul Engelmayer in Manhattan granted Timothy Parietti’s request to void his guilty plea and judgment of conviction, and have the government return his $1 million fine, saying it served the “interests of justice.” Prosecutors did not oppose the request. Parietti, 56, had also been sentenced to three yea…