If you want to delete one of your Custom Lists that you are no longer using, you can do that within the Lists section.
To do so, navigate to the Lists section via the advanced toolbar, then:
- In the top left corner, click on .
- In the resulting drop-down menu, hover over "My Lists." This will open a list of every Custom List you've created.
- In the resulting drop-down menu, hover over the name of the List you want to delete.
- Click to the right of the List’s name.
- In the resulting window, click .