How to delete a photo?

How do I delete the photo showing in my profile/header before I upload a new one?

The only way I have found to delete a header image from the server is by viewing the page source, identifying the image code, pasting that into a Listal image url you have open, and then you get the option to delete it. Hope that makes sense.

If I'm not mistaken, this is the case for both profile headers and list headers.