Update hetzner-ubuntu22-zfs-setup.sh

hetzner-ubuntu22-zfs-setup.sh

@@ -460,11 +460,8 @@ for kver in $(find /lib/modules/* -maxdepth 0 -type d | grep -v "$(uname -r)" |
 done
 
 echo "======= installing zfs on rescue system =========="
-  apt-get install --yes software-properties-common
-  gpg --keyid-format long --keyserver hkp://keyserver.ubuntu.com --recv-keys 0x871920D1991BC93C
-  gpg --export 871920D1991BC93C > /usr/share/keyrings/ubuntu-archive-keyring.gpg
-  apt --only-upgrade -t bullseye-backports install debootstrap
   echo "zfs-dkms zfs-dkms/note-incompatible-licenses note true" | debconf-set-selections
+  apt-get install --yes software-properties-common
   echo "y" | zfs
   zfs --version