Remove flag_left stuff.

Is buggy - object_id invalid, and doesn't appear to be used.

History:

c5606079b1997e3ac100076834c4ea32c1281d00 - initial creation
065e66ad47cb9c0b954d5ab570a0cf4f8b2f5ed0 - another a tag added
fb6f77c47c9e0aa82ad9853232082b3a4bfffe6c - a tag removed
b6b35349483e5002d325faa888882ce5a573adb2 - a tag removed
7fd8a8c1a40f86650e4bb27d120da96cc971419d - code moved

Change-Id: I1a43b16dbd3468f2de4c25d63505f1109c28a548