LAS VEGAS - A Nevada state lawmaker accused of threatening a state Democratic Assembly leader remained hospitalized Monday for a mental evaluation, while his court date was canceled with no charges filed.Assemblyman Steven Brooks' lawyer, Mitchell Posin, said he wasn't sure when Brooks' 72-hour medical evaluation, which began Friday, would be completed. Posin declined to say where the 40-year-old Democratic lawmaker was being treated."He's pleased they have not filed charges - yet, anyway," the lawyer said.Prosecutor Thom Gover, the deputy state attorney general handling Brooks' case, said he would have asked a judge on Monday for 30 more days to …