Remove glusterfs-native job from check queue

In the manila community meeting it was resolved [1]
to remove unmaintained drivers from the check queue
to avoid waste of infrastructure resources and to
remove "red noise" from the gerrit review pages.

Do so for the glusterfs-native driver.  Leave the
job defined as it is run in the experimental queue
and in devstack-glusterfs-plugin.

[1[ http://eavesdrop.openstack.org/irclogs/%23openstack-meeting-alt/%23openstack-meeting-alt.2017-11-02.log.html#t2017-11-02T15:26:17

Change-Id: I87f15ee7f73a8b4a16ae0549d0f2fae4b4c23ec2

.zuul.yaml

@@ -30,9 +30,6 @@
         - manila-tempest-dsvm-glusterfs-nfs:
             voting: false
             branches: ^(?!driverfixes/).*$
-        - manila-tempest-dsvm-glusterfs-native:
-            voting: false
-            branches: ^(?!driverfixes/).*$
         - manila-tempest-dsvm-hdfs:
             voting: false
             branches: ^(?!driverfixes/).*$