mavlink_mission: do not send the mission count if a new mission is detected since a receiver can now check this by changing mission ids in the MISSION_CURRENT stream

src/modules/mavlink/mavlink_mission.cpp

@@ -1868,8 +1868,6 @@ void MavlinkMissionManager::check_active_mission()
 		    || (_my_mission_dataman_id != (dm_item_t)_mission_sub.get().mission_dataman_id)) {
 			PX4_DEBUG("WPM: New mission detected (possibly over different Mavlink instance) Updating");
 			init_offboard_mission(_mission_sub.get());
-			send_mission_count(_transfer_partner_sysid, _transfer_partner_compid, _count[MAV_MISSION_TYPE_MISSION],
-					   MAV_MISSION_TYPE_MISSION, _crc32[MAV_MISSION_TYPE_MISSION]);
 		}
 	}
 }