message: Remove position setpoint reset during Motor::arm()
  The position setpoint is already set before arming in start_closed_loop_control().
  This fixes
diff: @@ -9,7 +9,6 @@ bool Controller::apply_config() {
  }
  void Controller::reset() {
  - pos_setpoint_ = 0.0f;
  vel_setpoint_ = 0.0f;
  vel_integrator_torque_ = 0.0f;
  torque_setpoint_ = 0.0f;
  