True, the links should not be outputted when not used, and the announce sitemap should as well not be displayed unless there are some.
These are the kind of things that makes this mod a beta. So right now, if you do not want to use the rss part, you can un install all the rss modules in GYM 's acp.
Then, for the auto linking, you can delete the bit of code added in overall_header.html and only keep the sitemap link in the overall_footer.html, look at the mod's install file, these two code changes are very small.
The doc as well will be enhanced with time ...
Besides, what do you think about the mod ?
Already went up to 10791 urls within a single sitemap