SANTA ANA—An Orange County Superior Court judge on July 14 granted a request by prosecutors to dismiss charges related to two alleged rape victims in the case against a Newport Beach hand surgeon and his girlfriend, who are accused in drugging and sexually assaulting several women. Prosecutors from the California Attorney General’s Office had said previously they wanted to chip down charges to one alleged victim in the case against Dr. Grant Robicheaux, 40, and Cerissa Laura Riley, 34. Robicheaux was charged initially with counts involving seven alleged victims and Riley with five. With  July 14’s ruling, the doctor now faces charges involving five alleged victims and Riley for three alleged victims, with charges related to other alleged victims to be decided later. The Attorney General’s Office took over prosecution of the case last year when another Orange County Superior Court judge removed Orange County District Attorney Todd Spitzer’s office …