AP_SmartRTL: EKF objects have moved into AP_AHRS_NavEKF

libraries/AP_SmartRTL/examples/SmartRTL_test/SmartRTL_test.cpp

@@ -20,9 +20,7 @@ static AP_SerialManager serial_manager;
 
 class DummyVehicle {
 public:
-    NavEKF2 EKF2{&ahrs};
+    AP_AHRS_NavEKF ahrs{AP_AHRS_NavEKF::FLAG_ALWAYS_USE_EKF};
-    NavEKF3 EKF3{&ahrs};
-    AP_AHRS_NavEKF ahrs{EKF2, EKF3, AP_AHRS_NavEKF::FLAG_ALWAYS_USE_EKF};
 };
 
 static DummyVehicle vehicle;