Remove userpics category

[Masamune]

Previously my image gallery had a 'fanart' section, in addition to the gallery's usual official artwork. However since the fanart section has fell into disuse, I'd like to remove it. However I can't seem to find a way to remove the actual category that links to user galleries from the list. Is there a way to automatically get rid of (or hide) this category and all of the userpics albums/pictures?

[Nibbler]

You need to delete the albums that are in it.