overlays: Create overlays

modules/programs/gnome/default.nix

@@ -1,8 +1,6 @@
 { pkgs, config, lib, ... }:
 
-let
-  unstable = (import ../../unstable.nix config);
-in {
+{
   config = {
     environment = {
       systemPackages = with pkgs; [
@@ -10,7 +8,7 @@ in {
         gnomeExtensions.appindicator
         gnomeExtensions.caffeine
         gnomeExtensions.gnome-40-ui-improvements
-        gnomeExtensionsCustom.notification-timeout # Custom package
+        gnomeExtensions.notification-timeout # Custom package
         gnomeExtensions.application-volume-mixer
         gnome.eog
         gnome.nautilus