It's a little confusing that it doesn't use the same syntax as .inputrc, but such is life...

You can also say "bind -u operate-and-get-next" to remove the binding of that function from *all* keys.

Though honestly, now that I look at it, it's a handy command I wish I'd known about before, and I may end up binding it to some other key, despite it's (relatively mild) danger.