How do I delete custom button functions?

How do I delete custom button functions?

Hi,

Correct me if I'm wrong, but it appears that we can't use regular Automation Action functions for buttons and instead have to write separate functions for custom buttons.

Now that being the case, there doesn't appear to be a way to delete existing button functions.
I can get a list of those functions when creating a new custom button, which lets us change the code for an existing function but not delete it.

Is there a separate admin page where I can manage the button functions?

Thanks.