Board Thread:Support Requests - Getting Started/@comment-23938005-20151007230100/@comment-26011081-20151007231956

http://[insert Wiki name here].wikia.com/wiki/Special:Categories

Enter the page with the Category in it. On the right-hand side when in Edit-Mode there is a header named "Categories", click that and a box with the list of them will appear. Hover over the one you would like to be deleted, and click the little trash can, confirm and publish.