Remove Update tox Step
Remove Update tox Step

Since the tox bug has been resolved[1] and tox has also moved past versions
1.6 and 1.7, this patch removes the caveat about using the correct version
of tox.

[1] https://bugs.launchpad.net/openstack-ci/+bug/1274135

Change-Id: Ib13c1380867c3ac93d04140801a40e9023c03943

ColdrickSotK/storyboard,ColdrickSotK/storyboard,ColdrickSotK/storyboard