refactor(nixos): move hardware config options to machine nixos module

modules/nixos/hardware/usb/default.nix

@@ -1,46 +0,0 @@
-{
-  config,
-  pkgs,
-  lib,
-  ...
-}:
-let
-  inherit (lib)
-    mkEnableOption
-    mkIf
-    mkMerge
-    singleton
-    ;
-  cfg = config.hardware.usb;
-in
-{
-  options.hardware.usb = {
-    automount = mkEnableOption "";
-    enableQmk = mkEnableOption "";
-  };
-
-  config = mkMerge [
-    (mkIf cfg.automount {
-      services.udisks2.enable = true;
-      home-manager.sharedModules = singleton {
-        services.udiskie = {
-          enable = true;
-          automount = true;
-          notify = true;
-        };
-      };
-    })
-    (mkIf cfg.enableQmk {
-      hardware.keyboard.qmk.enable = true;
-      services.udev = {
-        packages = with pkgs; [
-          vial
-          via
-          qmk
-          qmk-udev-rules
-          qmk_hid
-        ];
-      };
-    })
-  ];
-}