[pitivi] Remove the track-order-changed signal from Timeline as it isn't used anywhere.

[Edward Hervey <edwardrv src gnome org>]

commit b2b4f211017dc617d33ec0474ff645406003d3f7
Author: Alessandro Decina <alessandro decina collabora co uk>
Date:   Wed Mar 18 13:40:26 2009 +0100

    Remove the track-order-changed signal from Timeline as it isn't used anywhere.
---
 pitivi/timeline/timeline.py |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/pitivi/timeline/timeline.py b/pitivi/timeline/timeline.py
index 0ff1fa2..fd9b648 100644
--- a/pitivi/timeline/timeline.py
+++ b/pitivi/timeline/timeline.py
@@ -438,7 +438,6 @@ class Timeline(object ,Signallable):
         'duration-changed': ['duration'],
         'track-added': ['track'],
         'track-removed': ['track'],
-        'track-order-changed' :[],
     }
 
     def __init__(self):