gnome-clocks: remove unnecessary sound theme

plays a hardcoded ogg file now

Author: JohnRTitor

pkgs/desktops/gnome/apps/gnome-clocks/default.nix

@@ -13,7 +13,6 @@
   libxml2,
   gtk4,
   glib,
-  sound-theme-freedesktop,
   gsettings-desktop-schemas,
   gnome-desktop,
   geocode-glib_2,
@@ -65,13 +64,6 @@ stdenv.mkDerivation (finalAttrs: {
       gst-plugins-good
     ]);
 
-  preFixup = ''
-    gappsWrapperArgs+=(
-      # Fallback sound theme
-      --prefix XDG_DATA_DIRS : "${sound-theme-freedesktop}/share"
-    )
-  '';
-
   doCheck = true;
 
   passthru = {