ekf2: remove fake fusion condition in validity status

Fake pos/height fusion only starts when inertial dead reckoning time is
exceeded and is not considered as an aiding sensor anyway. The dead
reckoning flag is then enough to know if the position/velocity is valid.

src/modules/ekf2/EKF/ekf.h

@@ -294,17 +294,17 @@ class Ekf final : public EstimatorInterface
 
 	bool isLocalHorizontalPositionValid() const
 	{
-		return (!_horizontal_deadreckon_time_exceeded && !_control_status.flags.fake_pos);
+		return !_horizontal_deadreckon_time_exceeded;
 	}
 
 	bool isLocalVerticalPositionValid() const
 	{
-		return !_vertical_position_deadreckon_time_exceeded && !_control_status.flags.fake_hgt;
+		return !_vertical_position_deadreckon_time_exceeded;
 	}
 
 	bool isLocalVerticalVelocityValid() const
 	{
-		return !_vertical_velocity_deadreckon_time_exceeded && !_control_status.flags.fake_hgt;
+		return !_vertical_velocity_deadreckon_time_exceeded;
 	}
 
 	bool isYawFinalAlignComplete() const

src/modules/ekf2/EKF/ekf_helper.cpp

@@ -777,7 +777,6 @@ void Ekf::updateHorizontalDeadReckoningstatus()
 
 	if (inertial_dead_reckoning) {
 		if (isTimedOut(_time_last_horizontal_aiding, (uint64_t)_params.valid_timeout_max)) {
-			// deadreckon time exceeded
 			if (!_horizontal_deadreckon_time_exceeded) {
 				ECL_WARN("horizontal dead reckon time exceeded");
 				_horizontal_deadreckon_time_exceeded = true;