Colleen Murphy 7eab62a4ad Remove empty single_use_slave class
Our current version of project-config no longer needs to use this class
to build nodepool nodes. Third party CI systems will have to update to
the latest version of project-config to prevent his change from breaking
them.

Change-Id: I14a45e700b33cfcaebb7f6242ad00a010935e36c
Depends-On: Ib241ea976ca0a3d661599f36e3f5a2d4eb023c08
Depends-On: Ib1c2f6085f9e8b40e6a78cfb898738b0950bc339
2017-05-01 22:06:17 +02:00
..
2017-05-01 22:06:17 +02:00