Thread:Wwefanboi/@comment-27613327-20180624102036/@comment-30548885-20180625124959

Basically, you can click on the category and once you do that, go to its edit option where you can press the arrow and delete it.

If the category is not a subcategory (belonging to another category) which I think is your case, either remove the categories on all of the pages pertaining to it (via phone edit or visual mode on your computing device or phone on desktop mode) or add a category to the category, go to its edit option and press delete, almost just like the first option except there wasn't a category for the category, unabling you to delete it.