AP_EFI: Hirth: remove crankshaft sensor status

There is no crankshaft sensor status reported by this EFI. This line is
misleading and should be removed. The sensor health bitmask is already
logged elsewhere.

libraries/AP_EFI/AP_EFI_Serial_Hirth.cpp

@@ -33,7 +33,6 @@
 
 #define ENGINE_RUNNING 4
 #define THROTTLE_POSITION_FACTOR 10
-#define CRANK_SHAFT_SENSOR_OK 0x0F
 #define INJECTION_TIME_RESOLUTION 0.8
 #define THROTTLE_POSITION_RESOLUTION 0.1
 #define VOLTAGE_RESOLUTION 0.0049       /* 5/1024 */
@@ -301,7 +300,6 @@ void AP_EFI_Serial_Hirth::decode_data()
 
         // EFI2 log
         internal_state.engine_state = (Engine_State)record1->engine_status;
-        internal_state.crankshaft_sensor_status = (record1->sensor_ok & CRANK_SHAFT_SENSOR_OK) ? Crankshaft_Sensor_Status::OK : Crankshaft_Sensor_Status::ERROR;
 
         // ECYL log
         internal_state.cylinder_status.injection_time_ms = record1->injection_time * INJECTION_TIME_RESOLUTION;