Removing Custom Source

[Lonewolf147]

How can I delete a custom source name in the editor?

I'm playing with it trying to figure out what will display where when I fill out the fields to create a new Custom Source name for all my custom stuff. Now that I've created a couple that I don't want, how do I delete them from the list of available sources?

Thanks

EDIT: Nevermind (I can't go back and delete this post) The source names auto removed themselves on the next refresh if they weren't being used.