fix(custom_robot): Remove unused status variable in ServiceSwitch method

- Eliminated the unused 'status' variable from the ServiceSwitch method to streamline the code and improve clarity.

src/custom_robot.cpp

@@ -154,8 +154,7 @@ bool CustomRobot::SwitchService(const std::string& serviceName, bool enable) {
     }
     
     try {
-        int32_t status;
-        int32_t ret = rsc_->ServiceSwitch(serviceName, enable ? 1 : 0, status);
+        int32_t ret = rsc_->ServiceSwitch(serviceName, enable ? 1 : 0);
         if (ret != 0) {
             LOG_ERROR("Failed to switch service " + serviceName + ", error code: " + std::to_string(ret));
             return false;