hetzner-dedicated/zfs: Just use hetzner's way of installing zfs in rescue

hosters/hetzner-dedicated/zfs-uefi-nvme-nixos.sh

@@ -27,32 +27,11 @@
 # * exports of env vars are added throughout the script in case you want to run it manually
 export LC_ALL=C
 
-# ORIGINAL WARNING: on 2023/07/16 the rescue system of hetzner boots with kernel 6.3.7 which
-# is by default not supported by the latest debian package. You need to update to debian
-# unstable to proceed with the zfs installation.
-
-# NEW WARNING: Upgrading to unstable is too much work, maybe just downloading zfs and building it is easier.
-
 apt update
-apt install -y dpkg-dev linux-headers-$(uname -r) linux-image-amd64 sudo parted zfsutils-linux libssl-dev uuid-dev zlib1g-dev libblkid-dev 
+apt install -y dpkg-dev linux-headers-$(uname -r) linux-image-amd64 sudo parted zfsutils-linux libssl-dev uuid-dev zlib1g-dev libblkid-dev
 
 set -euox pipefail
 
-# TODO: This part is slow and not idempotent, so it needs to be commented out on
-# subsequent runs
-cd "$(mktemp -d)"
-wget "$(curl -Ls https://api.github.com/repos/openzfs/zfs/releases/latest| grep -E "browser_download_url.*\.tar.gz\"$"| cut -d '"' -f 4)"
-tar xfv zfs*.tar.gz && rm zfs*.tar.gz
-cd zfs*
-./configure && make -j "$(nproc)"
-make install
-ldconfig
-modprobe zfs
-
-# hetzner has some weird symlinks to make you install zfs with their script
-rm /usr/local/sbin/zfs || true
-rm /usr/local/sbin/zpool || true
-
 # Inspect existing disks
 # Should give you something like
 # NAME        MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINT