Remove devstack from zuul for config due to glance issues

It looks like devstack zuul is failing when it sets up glance.

This review recently merged which does not seem to work with our
devstack configuration.
https://review.opendev.org/#/c/665606/

Removing this devstack job from zuul.  It can be re-enabled if
the compatability issues between our environment and glance
are resolved.

Change-Id: I0da7fbbef6a6ab65b5146435c6e01fff347c53d1
Closes-Bug: 1840292
Signed-off-by: Al Bailey <Al.Bailey@windriver.com>

.zuul.yaml

@@ -6,7 +6,6 @@
       jobs:
         - build-openstack-api-ref
         - build-openstack-releasenotes
-        - flock-devstack-config
         - openstack-tox-linters
         - sysinv-tox-py27
         - sysinv-tox-py35
@@ -24,7 +23,6 @@
       jobs:
         - build-openstack-api-ref
         - build-openstack-releasenotes
-        - flock-devstack-config
         - openstack-tox-linters
         - sysinv-tox-py27
         - sysinv-tox-py35