NEW YORK (Bloomberg) Maurice (Hank) Greenberg, the former American International Group Inc chief executive officer, claimed the judge presiding over a New York state lawsuit against him is biased and must step down from the case, according to court papers.New York state Supreme Court Justice Charles Ramos's improper statements and reliance on inadmissible evidence require his recusal, Greenberg and his co-defendant Howard Smith, AIG's former chief financial officer, said in court papers dated yesterday.Former New York Attorney General Eliot Spitzer filed the suit in 2005, accusing Greenberg and Smith of using sham transactions to distort New York-based AIG's reported financial condition. On March 1, an appeals court put on hold Ramos's plan to start a trial May 2.