Remove legacy-devstack-dsvm-py36-updown-fedora-26
Remove legacy-devstack-dsvm-py36-updown-fedora-26

Because we are moving to fedora-27, it doesn't make much sense to run
this job, as everything is python3 now.

Change-Id: Icbc1283997c65da2baf9113144bed3f1516edae8
Signed-off-by: Paul Belanger <e7139c8e6c4ea75cc1c287ce081b2dc0f3ab39ec@redhat.com>

openstack-infra/project-config,openstack-infra/project-config