Remove LNDMC_ALT_MAX

This should be replaced with the maximum geofence
altitude GF_MAX_VER_DIST. I'm not aware anyone is using
this functionality as is.

src/modules/navigator/loiter.cpp

@@ -119,7 +119,6 @@ Loiter::set_loiter_position()
 
 	// convert mission item to current setpoint
 	pos_sp_triplet->previous.valid = false;
-	mission_apply_limitation(_mission_item);
 	mission_item_to_position_setpoint(_mission_item, &pos_sp_triplet->current);
 	pos_sp_triplet->next.valid = false;