Whether or not it is an explanation, it is showing on the frontend and with the SO Hide SEO Bloat plugin we are focusing on the bloat in the WordPress backend.
If you want you can open a feature request on Github, where I actually support the plugin, and if that generates enough interest, we can think about adding it as a new feature.
In the meantime you can switch off the XML sitemap generator and use a different one or write your own plugin to turn off the backlink :)