Unused job has been removed from Savanna projects.

flake8 and hacking are now combined into the single job and used instead
of two separated jobs - pep8 with copy-pasted hacking.py script and
pyflakes.

Change-Id: I8b2dc3fdc4c5a9ec921d39dae3e90405a01b7109
Reviewed-on: https://review.openstack.org/27343
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Reviewed-by: Elizabeth Krumbach <lyz@princessleia.com>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Reviewed-by: Khai Do <zaro0508@gmail.com>
Approved: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins