user/bspwm: remove declarative wallpaper

so i can use other wallpapers without feeling weird for including it in
a cc0 repo

modules/user/bspwm.nix

@@ -1,4 +1,4 @@
-{ config, ... }: {
+{ config, pkgs, ... }: {
   xsession.windowManager.bspwm = {
     enable = true;
     monitors = { eDP-1 = [ "1" "2" "3" "4" "5" "6" "7" "8" "9" "0"]; };
@@ -9,7 +9,7 @@
       top_padding = 25;
     };
     extraConfig = ''
-      feh --no-fehbg --bg-fill ${config.xdg.configHome}/xorg/wallpaper.png
+      ${pkgs.feh}/bin/feh --no-fehbg --bg-fill ~/Pictures/Wallpapers/current
       systemctl --user restart polybar # home-manager loads this too early
     '';
   };

modules/user/xorg.nix

@@ -7,7 +7,6 @@
   };
 
   xdg.configFile."xorg/xinitrc".source = ../../scripts/xinitrc;
-  xdg.configFile."xorg/wallpaper.png".source = ../../res/wallpaper.png;
   xresources = {
     path = "${config.xdg.configHome}/xorg/xresources";
     properties = {