clutter-text.c: Remove redundant clutter_text_set_buffer call in

finalize.

This is done in the dispose vfunc already so would be a no-op
anyhow, but throws warnings now in recent glib versions.

see:
linuxmint/cinnamon#11562,
https://gitlab.gnome.org/GNOME/mutter/-/issues/2566

closes: linuxmint/cinnamon#11562.

Author: mtwebster

clutter/clutter/clutter-text.c

@@ -1807,7 +1807,6 @@ clutter_text_finalize (GObject *gobject)
 
   clutter_text_dirty_paint_volume (self);
 
-  clutter_text_set_buffer (self, NULL);
   g_free (priv->font_name);
 
   g_clear_object (&priv->input_focus);