PS: there is always the option to use the keyboard shortcut again and unlabel it, e.g. command + 8 , perform once, it's labeled, perform again, it's unlabeled.
I would just like an unlabel command, but I tried several commands e.g. Command + 9 (to take it away from blue, which I don't need) - registered with Apple, but didn't work. I tried Command + Option + 0 - didn't work, either, and I got they cranky "moop moop" sound of something not working.