Extract a dwm profile module

I've made this a module as it imports configuration from `st` and
potentially others as I continue to refactor.

modules/home-manager/desktop/default.nix

@@ -1,7 +1,6 @@
 {
   imports = [
     ./discord.nix
-    ./dwm
     ./flameshot.nix
     ./gtk.nix
     ./media

modules/home-manager/desktop/dwm/default.nix

@@ -1,28 +0,0 @@
-{
-  config,
-  lib,
-  pkgs,
-  ...
-}:
-
-with lib;
-
-{
-  options.homeManagerModules.dwm.enable = mkEnableOption "Enable dwm";
-
-  config = mkIf config.homeManagerModules.dwm.enable {
-    home = {
-      file."${config.home.sessionVariables.XINITRC}".source = ./xinitrc;
-
-      sessionVariables = {
-        XINITRC = "${config.xdg.configHome}/X11/xinitrc";
-      };
-
-      packages = with pkgs; [
-        dunst
-        poweralertd
-        xwallpaper
-      ];
-    };
-  };
-}

modules/home-manager/desktop/dwm/xinitrc

@@ -1,5 +0,0 @@
-systemctl --user import-environment DISPLAY
-poweralertd -s &
-setbg &
-systemctl --user start dwm-status &
-exec dwm