Remove GTK4 window buttons

hosts/home.nix

@@ -30,8 +30,11 @@ in
       name = "${themeName}";
       package = "${theme}";
     };
-    gtk3.extraConfig = {
     # Remove minimize, maximize, and close buttons
+    gtk3.extraConfig = {
+      gtk-decoration-layout = "appmenu:none";
+    };
+    gtk4.extraConfig = {
       gtk-decoration-layout = "appmenu:none";
     };
   };