AirspeedValidator: remove unused variable _tas_gate

Signed-off-by: Silvan Fuhrer <silvan@auterion.com>

src/modules/airspeed_selector/AirspeedValidator.hpp

@@ -98,7 +98,6 @@ public:
 	void set_wind_estimator_beta_noise(float beta_var) { _wind_estimator.set_beta_noise(beta_var); }
 	void set_wind_estimator_tas_gate(uint8_t gate_size)
 	{
-		_tas_gate = gate_size;
 		_wind_estimator.set_tas_gate(gate_size);
 	}
 
@@ -147,7 +146,6 @@ private:
 	static constexpr uint64_t DATA_STUCK_TIMEOUT{2_s}; ///< timeout after which data stuck check triggers when data is flat
 
 	// states of innovation check
-	float _tas_gate{1.0f}; ///< gate size of airspeed innovation (to calculate tas_test_ratio)
 	bool _innovations_check_failed{false};  ///< true when airspeed innovations have failed consistency checks
 	float _tas_innov_threshold{1.0}; ///< innovation error threshold for triggering innovation check failure
 	float _tas_innov_integ_threshold{-1.0}; ///< integrator innovation error threshold for triggering innovation check failure