Delete deprecated Hacking in tox.ini
Delete deprecated Hacking in tox.ini

Some hacking have been removed,so we can delete them.
More details:
    https://github.com/openstack-dev/hacking/blob/master/setup.cfg

Change-Id: Ic8685a4f595d981f4b60a6f6a0ac66f3a91a08be

juledwar/openstack-ansible-os_ironic,juledwar/openstack-ansible-os_ironic