Decommission http://onie.github.io/onie/ documentation

This project has moved to the Open Compute Project's git repository.

Repo: `https://github.com/opencomputeproject/onie <https://github.com/opencomputeproject/onie>`_

Wiki: `http://www.opencompute.org/wiki/Networking/ONIE <http://www.opencompute.org/wiki/Networking/ONIE>`_

Mailing List: `http://lists.opencompute.org/mailman/listinfo/opencompute-onie <http://lists.opencompute.org/mailman/listinfo/opencompute-onie>`_