Drop now unneeded files

cross-hacks.nix

@@ -1,55 +0,0 @@
-# From this upstream repo:
-# https://github.com/samueldr/cross-system
-{ config, pkgs, lib, ... }:
-{
-
-  nixpkgs.overlays = [
-    (self: super: {
-      # Does not cross-compile...
-      alsa-firmware = pkgs.runCommandNoCC "neutered-firmware" {} "mkdir -p $out";
-
-      # A "regression" in nixpkgs, where python3 pycryptodome does not cross-compile.
-      crda = pkgs.runCommandNoCC "neutered-firmware" {} "mkdir -p $out";
-
-      # Regression caused by including a new package in the closure
-      # Added in f1922cdbdc608b1f1f85a1d80310b54e89d0e9f3
-      smartmontools = super.smartmontools.overrideAttrs(old: {
-        configureFlags = [];
-      });
-    })
-
-    (final: super:
-      let
-        pkgconfig-helper = final.writeShellScriptBin "pkg-config" ''         
-          exec ${super.buildPackages.pkgconfig}/bin/${super.buildPackages.pkgconfig.targetPrefix}pkg-config "$@"
-        '';                                                                                
-      in
-      {
-        efibootmgr = super.efibootmgr
-        .overrideAttrs(old: {
-          nativeBuildInputs = old.nativeBuildInputs ++ [
-            pkgconfig-helper
-          ];
-        })
-        ;
-    })
-  ];
-
-  # (Failing build in a dep to be investigated)
-  security.polkit.enable = false;
-
-  # cifs-utils fails to cross-compile
-  # Let's simplify this by removing all unneeded filesystems from the image.
-  boot.supportedFilesystems = lib.mkForce [ "vfat" ];
-
-  # texinfoInteractive has trouble cross-compiling
-  documentation.info.enable = lib.mkForce false;
-
-  # `xterm` is being included even though this is GUI-less.
-  # → https://github.com/NixOS/nixpkgs/pull/62852
-  services.xserver.desktopManager.xterm.enable = lib.mkForce false;
-
-  # ec6224b6cd147943eee685ef671811b3683cb2ce re-introduced udisks in the installer
-  # udisks fails due to gobject-introspection being not cross-compilation friendly.
-  services.udisks2.enable = lib.mkForce false;
-}

system.nix

@@ -1,7 +0,0 @@
-import <nixpkgs/nixos> {
-  configuration =
-    if builtins.currentSystem == "aarch64-linux"
-    then builtins.toPath (./. + "/configuration.nix")
-    else builtins.toPath (./. + "/with-cross.nix")
-  ;
-}

with-cross.nix

@@ -1,11 +0,0 @@
-{ config, pkgs, lib, ... }:
-{
-  imports = [
-    ./cross-hacks.nix
-    ./configuration.nix
-  ];
-
-  nixpkgs.crossSystem = {
-    system = "aarch64-linux";
-  };
-}