[gnome-shell] app-system: Kill an unused warning

[Jasper St. Pierre <jstpierre src gnome org>]

commit c8792ccfa612e592ec1d01a82ece13491e7548e4
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Sat Apr 20 18:53:13 2013 -0400

    app-system: Kill an unused warning
    
    https://bugzilla.gnome.org/show_bug.cgi?id=698486

 src/shell-app-system.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/src/shell-app-system.c b/src/shell-app-system.c
index 847e9a4..4d59fa3 100644
--- a/src/shell-app-system.c
+++ b/src/shell-app-system.c
@@ -672,9 +672,7 @@ search_tree (ShellAppSystem *self,
   g_hash_table_iter_init (&iter, apps);
   while (g_hash_table_iter_next (&iter, &key, &value))
     {
-      const char *id = key;
       ShellApp *app = value;
-      (void)id;
       _shell_app_do_match (app, normalized_terms,
                            &prefix_results,
                            &substring_results);