msg/geofence_update.msg: remove this topic

We'll use dataman to check for geofence data updates.

src/modules/navigator/navigator.h

@@ -236,7 +236,6 @@ private:
 	int		_param_update_sub{-1};		/**< param update subscription */
 	int		_sensor_combined_sub{-1};	/**< sensor combined subscription */
 	int		_vehicle_command_sub{-1};	/**< vehicle commands (onboard and offboard) */
-	int		_geofence_update_sub{-1};	/**< geofence updates */
 	int		_vstatus_sub{-1};		/**< vehicle status subscription */
 
 	orb_advert_t	_att_sp_pub{nullptr};

src/modules/navigator/navigator_main.cpp

@@ -65,7 +65,6 @@
 #include <arch/board/board.h>
 
 #include <uORB/uORB.h>
-#include <uORB/topics/geofence_update.h>
 #include <uORB/topics/fw_pos_ctrl_status.h>
 #include <uORB/topics/home_position.h>
 #include <uORB/topics/mission.h>
@@ -252,7 +251,6 @@ Navigator::task_main()
 	_offboard_mission_sub = orb_subscribe(ORB_ID(offboard_mission));
 	_param_update_sub = orb_subscribe(ORB_ID(parameter_update));
 	_vehicle_command_sub = orb_subscribe(ORB_ID(vehicle_command));
-	_geofence_update_sub = orb_subscribe(ORB_ID(geofence_update));
 
 	/* copy all topics first time */
 	vehicle_status_update();
@@ -346,15 +344,6 @@ Navigator::task_main()
 			params_update();
 		}
 
-		/* geofence updated */
-		orb_check(_geofence_update_sub, &updated);
-
-		if (updated) {
-			geofence_update_s geofence_update;
-			orb_copy(ORB_ID(geofence_update), _geofence_update_sub, &geofence_update);
-			_geofence.updateFence();
-		}
-
 		/* vehicle status updated */
 		orb_check(_vstatus_sub, &updated);
 
@@ -706,8 +695,6 @@ Navigator::task_main()
 	_param_update_sub = -1;
 	orb_unsubscribe(_vehicle_command_sub);
 	_vehicle_command_sub = -1;
-	orb_unsubscribe(_geofence_update_sub);
-	_geofence_update_sub = -1;
 
 	PX4_INFO("exiting");