Revert use of docs env in docs job
Revert use of docs env in docs job

The docs jobs _intentionally_ run only "python setup.py build_sphinx"
because that is the standard way python projects build docs, and that
is what the OpenStack Project Testing Interface[1] specifies.

[1] http://governance.openstack.org/reference/project-testing-interface.html

Revert "Fix search for docs tox job in run-docs.sh"

This reverts commit 3f8b45a8c0cc87b9f6d79c10e1b73c00adb7ce4e.

Revert "run-docs.sh: execute docs job if present"

This reverts commit 0ced503c2792b2f50559f66abd92d81e1571b77e.

Change-Id: Ie4420db4d34576f1627a680b883602cdff1fac71

dongwenjuan/project-config,openstack-infra/project-config,openstack-infra/project-config,dongwenjuan/project-config,coolsvap/project-config,Tesora/tesora-project-config,Tesora/tesora-project-config,noorul/os-project-config,noorul/os-project-config,coolsvap/project-config