Remove support for obsolete --old_style option in the update payload generator.

This is in preparation to remove support for old style full updates in the
update engine itself.

BUG=chromium-os:12542
TEST=tested AU through dev server

Change-Id: I8692cfd89620dbb2ad99cc7ff4906b43d6f2f80c
Reviewed-on: http://gerrit.chromium.org/gerrit/707
Tested-by: Darin Petkov <petkov@chromium.org>
Reviewed-by: Chris Sosa <sosa@chromium.org>
2 files changed