[pitivi] pipeline: Remove unused field

[Alexandru Băluț <alexbalut src gnome org>]

commit a4c70c0369e5b2d1a926a7f0ff5f5ec0fe28010a
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Tue Feb 6 22:29:33 2018 +0100

    pipeline: Remove unused field
    
    It was introduced in commit f04cdaf204ea664933ea524057158fae291c66f6 but
    it has never been used.

 pitivi/utils/pipeline.py |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/pitivi/utils/pipeline.py b/pitivi/utils/pipeline.py
index f10a568..ddafd6e 100644
--- a/pitivi/utils/pipeline.py
+++ b/pitivi/utils/pipeline.py
@@ -613,7 +613,6 @@ class Pipeline(GES.Pipeline, SimplePipeline):
 
     def _busMessageCb(self, bus, message):
         if message.type == Gst.MessageType.ASYNC_DONE:
-            self.commiting = False
             self.app.gui.timeline_ui.timeline.update_visible_overlays()
 
         if message.type == Gst.MessageType.ASYNC_DONE and\