Updated openstack/openstack
Project: openstack/oslo.concurrency  660f6089979781be0f8941f3bb20b04afe8f226c

Remove unused incubator modules

All of these modules have been obsoleted by libs, so we don't need
them in this project anymore.

Change-Id: I99a52cb0f8f760ee54b6e6230dd83c9627d5cb46