cleanup debian specific steps in build-images action

.forgejo/workflows/build-images.yaml

@@ -8,13 +8,13 @@ jobs:
     name: Build NixOS images
     runs-on: nixos
     steps:
-      - name: install sudo
-        run: apt-get update && apt-get -y install sudo
+      #- name: install sudo
+      #  run: apt-get update && apt-get -y install sudo
       - name: checkout repository
         uses: actions/checkout@v4
-      - name: install nix
-        uses: https://git.distrilab.fr/nix-clic/install-nix-action@v27
-        with:
-          nix_path: nixpkgs=channel:nixos-24.05
+      #- name: install nix
+      #  uses: https://git.distrilab.fr/nix-clic/install-nix-action@v27
+      #  with:
+      #    nix_path: nixpkgs=channel:nixos-24.05
       - name: run generator
         run: nix-shell -p nixos-generators --run "nixos-generate -c inventory/demo-configuration.nix -f proxmox-lxc"