Deletion of links to worlds

Is there a way to delete the links to certain world one no longer uses? I played for a long time and had 11 worlds listed in my change world screen. One example is World 81, another is World 105. All the worlds I used to play will just end up as discarded links that pile up. I usually stop for various reasons, another reason would be that I can't progress very quickly and end up with a 2nd base after the first week.