Keyboard shortcut to Delete in Preview

I will often to clipboard screenshots on my Mac and open them in Preview to print. I do NOT want to save the document so when I close I have the option to DELETE (which is in RED), but I haven't figured out a keyboard shortcut to DELETE, so I need to use the mouse (I know, not much of an issue, but…).

I was hoping, COMMAND-D would work (nope), or OPTION-D (nope) or CONTROL-D (nope) so I am wondering if DELETE has a keyboard shortcut.

Does anyone know?

I am using the new M1 MacMini and Big Sur.