steveej-x13s-rmvbl: init with minimal setup

this configures a standalone USB device that doesn't need configuration
of the firmware's EFI variables.

nix/os/devices/steveej-x13s/configuration.nix

@@ -1,82 +0,0 @@
-{ repoFlake
-, pkgs
-, lib
-, config
-, nodeFlake
-, nodeName
-, localDomainName
-, system
-, ...
-}:
-
-{
-  imports = [
-    # repoFlake.inputs.sops-nix.nixosModules.sops
-
-    # ../../profiles/common/user.nix
-
-    {
-      nix.nixPath = [
-        "nixpkgs=${pkgs.path}"
-      ];
-
-      nix.settings.experimental-features = [
-        "nix-command"
-        "flakes"
-      ];
-
-      nix.settings.max-jobs = lib.mkDefault "auto";
-      nix.settings.cores = lib.mkDefault 0;
-    }
-
-    {
-      services.openssh.enable = true;
-      services.openssh.settings.PermitRootLogin = "yes";
-
-      # users.commonUsers = {
-      #   enable = true;
-      #   enableNonRoot = false;
-      #   rootPasswordFile = config.sops.secrets.passwords-root.path;
-      # };
-
-      users.users.root.password = "install";
-
-      # sops.defaultSopsFile = ../../../../secrets/${nodeName}/secrets.yaml;
-      # sops.defaultSopsFormat = "yaml";
-
-      # sops.secrets.passwords-root.neededForUsers = true;
-    }
-  ];
-
-  networking = {
-    hostName = nodeName;
-    useNetworkd = false;
-
-    networkmanager.enable = false;
-
-    firewall.enable = false;
-  };
-
-  system.stateVersion = "23.11";
-
-  # We exclude a number of modules included in the default list. A non-insignificant amount do
-  # not apply to embedded hardware like this, so simply skip the defaults.
-  #
-  # Custom kernel is required as a lot of MTK components misbehave when built as modules.
-  # They fail to load properly, leaving the system without working ethernet, they'll oops on
-  # remove. MTK-DSA parts and PCIe were observed to do this.
-
-  # boot.initrd.includeDefaultModules = false;
-  # boot.initrd.kernelModules = ["rfkill" "cfg80211" "mt7915e"];
-  # boot.initrd.availableKernelModules = ["nvme"];
-
-  nixpkgs.config.allowUnfree = true;
-
-  # hardware.enableRedistributableFirmware = true;
-
-  environment.systemPackages = [
-    pkgs.busybox
-  ];
-
-  fileSystems."/".label = "x13s_root";
-}