drop old release documentation
drop old release documentation

Yubico/yubikey-personalization,eworm-de/yubikey-personalization,eworm-de/yubikey-personalization,Yubico/yubikey-personalization,Yubico/yubikey-personalization-dpkg,Yubico/yubikey-personalization-dpkg,eworm-de/yubikey-personalization,Yubico/yubikey-personalization-dpkg