No communication with vehicle in destructor

At that point the vehicle is gone, so need to to clean it up

src/AutoPilotPlugins/PX4/PowerComponentController.cc

@@ -36,11 +36,6 @@ PowerComponentController::PowerComponentController(void)
 
 }
 
-PowerComponentController::~PowerComponentController()
-{
-    _stopCalibration();
-}
-
 void PowerComponentController::calibrateEsc(void)
 {
     _warningMessages.clear();

src/AutoPilotPlugins/PX4/PowerComponentController.h

@@ -40,7 +40,6 @@ class PowerComponentController : public FactPanelController
     
 public:
     PowerComponentController(void);
-    ~PowerComponentController();
     
     Q_INVOKABLE void calibrateEsc(void);
     Q_INVOKABLE void busConfigureActuators(void);