UnregisterFileDevice
status_t UnregisterFileDevice(const char* filename);
status_t UnregisterFileDevice(partition_id device);
status_t error = roster.UnregisterFileDevice(id);
status_t error = roster.UnregisterFileDevice(device.ID());
status_t error = roster.UnregisterFileDevice(id);
status_t error = roster.UnregisterFileDevice(device.ID());
roster.UnregisterFileDevice(fID);
UnregisterFileDevice unregisterFileDevice;
roster.UnregisterFileDevice(id);
roster.UnregisterFileDevice(id);