Plugged POE
That carb does not have the POE, (pull over enrichment), what you have circled in your picture is the secondary air bleed tube.
If it had the POE system, there would be a 3rd set of tubes located in the slightly larger holes just ahead of the air bleed tubes, and these would be longer and thicker. In addition, the discharge holes for the POE are located just above or below the choke blade when it's closed.
If those are not there, the carb never had a POE system. If there are discharge ports, then it's possible that someone pulled the tubes at some point and didn't replace them.