meta: Drop xcursor

This doesn't seem to change anything nowadays with Hyprland so it should
be okay to drop in 2024.

Edit: This seems to get set with pointerCursor in home-manager which
gets set by stylix, so it shouldn't matter either way.

See: https://github.com/nix-community/home-manager/blob/ff1c3646541316258b1ca64e9b25d4c9cca8e587/modules/config/home-cursor.nix#L172-L175
And: https://github.com/danth/stylix/blob/b36fb34a9c8fb728c7efe5dbbb222bb23dcaa967/stylix/hm/cursor.nix#L15

containers/default.nix

@@ -11,7 +11,6 @@
     ../home/gtk.nix
     ../home/kitty.nix
     ../home/neovim.nix
-    ../home/xcursor.nix
     ../home/xresources.nix
     ../home/yazi.nix
   ];

home/hyprland.nix

@@ -46,7 +46,6 @@ in
 
     settings = {
       env = [
-        "XCURSOR_SIZE,24"
         "BROWSER,librewolf"
         "QT_IM_MODULE,fcitx"
         "XMODIFIERS,@im=fcitx"