How to delete extra epic?

I created a sample epic, but I can’t see it in a board view.
Yesterday, I asked support team how to see it, they answered epic is not visible in the board.

What I want to know is how to delete the extra sample epic from the list.

In roadmap, there is a option “remove XXX from roadmap”, but it is just removing from roadmap, we can still select the epic in issue editing form.

How to remove the epic?