Remove Nitrokley from GPG settings

Nitrokeys Misc
2

Hi!

You need to remove the key’s stub. As far as I see you need to do so by hand, see:

E.g. in my case:

$ gpg2 --delete-secret-key szczepan@nitrokey.com
sec  rsa4096/D9BAE35991DE5B22 2016-01-11 Szczepan Zalega <szczepan.zalega@gmail.com>
                                                                                    
Delete this key from the keyring? (y/N) y                                           
This is a secret key! - really delete? (y/N) y                                      

### or by hand

$ gpg2  --with-keygrip -k szczepan@nitrokey.com | grep Keygrip
      Keygrip = B06F064034E06C022592DF7C411487BFA5E40AAD
      Keygrip = F6DA2A42DFCBA0CC25FF281178D8EDB17A648E91
pushd ~/.gnupg/private-keys-v1.d/ 
mv B06F064034E06C022592DF7C411487BFA5E40AAD* /tmp
mv F6DA2A42DFCBA0CC25FF281178D8EDB17A648E91* /tmp
popd

I agree it would be nice to have it in our documentation. CC @jan

Edit:
Later on just running gpg2 --card-status will make them recreated.