Status quo today in the wake of four lawyers leaving three Boston firms to start a new Boston office for San Francisco-based Littler Mendelson. While Bingham McCutchen yesterday removed partner David C. Casey’s name from its Web site, it retains the name of associate Suzanne Suppa Sullivan. And Choate Hall & Stewart still lists departing partner Gregory C. Keating. No mention yet of the new lawyers on Littler’s Web site.