Revert "nixos-remote: add --skip-disko flag"

because disko is needed to mount the disks, and disko does not have an
"mount only" flag.

This reverts commit 68738e0.

Author: pogobanane

src/nixos-remote.sh

@@ -15,8 +15,6 @@ Options:
   do not reboot after installation, allowing further customization of the target installation.
 * --kexec url
   use another kexec tarball to bootstrap NixOS
-* --skip-disko
-  dont format disks with disko
 * --stop-after-disko
   exit after disko formating, you can then proceed to install manually or some other way
 * --extra-files files
@@ -91,9 +89,6 @@ while [[ $# -gt 0 ]]; do
     shift
     shift
     ;;
-  --skip-disko)
-    skip_disko=y
-    ;;
   --stop-after-disko)
     stop_after_disko=y
     ;;
@@ -298,12 +293,8 @@ for path in "${!disk_encryption_keys[@]}"; do
   ssh_ "umask 077; cat > $path" <"${disk_encryption_keys[$path]}"
 done
 
-if [[ ${skip_disko} == "y" ]]; then
-  echo "Skipping disko (partitioning)."
-else
-  nix_copy --to "ssh://$ssh_connection" "$disko_script"
-  ssh_ "$disko_script"
-fi
+nix_copy --to "ssh://$ssh_connection" "$disko_script"
+ssh_ "$disko_script"
 
 if [[ ${stop_after_disko-n} == "y" ]]; then
   # Should we also do this for `--no-reboot`?