How to delete a custom style

I recently defined two custom styles for my app. I now realize that we won’t be needing those, so I’d like to delete them from the app. But there seems to be no way to delete a custom style once it’s added. In both SAB 4.7 and 5.1, selecting the style and pressing DEL has no effect, and right-clicking on the style does not provide a Delete option. Is there any way to remove these custom styles?

If all the style properties are blank then it does nothing.

Of course div.test won’t match anything in USFM.

You have to select the style before you can right click on it. Then you can edit it or reset it to blank.