Tracker: move setting of compass sys_status bits up

AntennaTracker/GCS_Tracker.cpp

@@ -57,22 +57,12 @@ void GCS_Tracker::update_vehicle_sensor_status_flags()
         MAV_SYS_STATUS_SENSOR_YAW_POSITION;
 
     // first what sensors/controllers we have
-    if (AP::compass().enabled()) {
-        control_sensors_present |= MAV_SYS_STATUS_SENSOR_3D_MAG;
-        control_sensors_enabled |= MAV_SYS_STATUS_SENSOR_3D_MAG;
-    }
     const AP_GPS &gps = AP::gps();
     if (gps.status() > AP_GPS::NO_GPS) {
         control_sensors_present |= MAV_SYS_STATUS_SENSOR_GPS;
         control_sensors_enabled |= MAV_SYS_STATUS_SENSOR_GPS;
     }
 
-    AP_AHRS &ahrs = AP::ahrs();
-
-    const Compass &compass = AP::compass();
-    if (AP::compass().enabled() && compass.healthy(0) && ahrs.use_compass()) {
-        control_sensors_health |= MAV_SYS_STATUS_SENSOR_3D_MAG;
-    }
     if (gps.is_healthy()) {
         control_sensors_health |= MAV_SYS_STATUS_SENSOR_GPS;
     }