[glom] DbAddDel: Do not use deprecated set_rules_hint().

[Murray Cumming <murrayc src gnome org>]

commit 6e0ba6c29b583731aa8d278d1629ac411c4bf0d9
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Dec 2 20:13:34 2014 +0100

    DbAddDel: Do not use deprecated set_rules_hint().
    
    Apparently this is now for the theme to decide.

 glom/mode_data/db_adddel/db_adddel.cc |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/glom/mode_data/db_adddel/db_adddel.cc b/glom/mode_data/db_adddel/db_adddel.cc
index 3c4775d..5f465c0 100644
--- a/glom/mode_data/db_adddel/db_adddel.cc
+++ b/glom/mode_data/db_adddel/db_adddel.cc
@@ -81,7 +81,6 @@ DbAddDel::DbAddDel()
   m_ScrolledWindow.set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);
   m_ScrolledWindow.set_shadow_type(Gtk::SHADOW_IN);
   m_TreeView.set_fixed_height_mode(); //This allows some optimizations.
-  m_TreeView.set_rules_hint();
   m_ScrolledWindow.add(m_TreeView);
   pack_start(m_ScrolledWindow);