Hey! I’m so sorry about that, I’ve tried sending in the fix to Tumblr but they haven’t approved the theme yet, much less the fixes for it! In order to delete this, go to line 571 (or around there) of the code, and delete this line:
<li><a href="http://sailorv.tumblr.com">My Tumblr</a></li>
Sorry again for this issue - I really didn’t mean to put that in there!