Merge "VolumeControl: remove dead code"

    StartQueueOperation();

  }

  void ProceedVolumeOperation(int operation_id) {

    auto op = find_if(ongoing_operations_.begin(), ongoing_operations_.end(),

                      [operation_id](auto& operation) {

                        return operation.operation_id_ == operation_id;

                      });

    DLOG(INFO) << __func__ << " operation_id: " << operation_id;

    if (op == ongoing_operations_.end()) {

      LOG(ERROR) << __func__

                 << " Could not find operation_id: " << operation_id;

      return;

    }

    DLOG(INFO) << __func__ << " procedure continued for operation_id: "

               << op->operation_id_;

    alarm_set_on_mloop(op->operation_timeout_, 3000, operation_callback,

                       INT_TO_PTR(op->operation_id_));

    devices_control_point_helper(op->devices_, op->opcode_, &(op->arguments_));

  }

  void PrepareVolumeControlOperation(std::vector<RawAddress> devices,

                                     int group_id, bool is_autonomous,

                                     uint8_t opcode,