zuul: Drop neutron-linuxbridge-tempest job

Neutron has deprecated linuxbridge support and is only doing reduced
testing for the neutron-linuxbridge-tempest job, so we need no longer
run it in devstack, even less gate on it.

Signed-off-by: Dr. Jens Harbott <harbott@osism.tech>
Change-Id: Ie1a8f978efe7fc9b037cf6a6b70b67d539d76fd6
diff --git a/.zuul.yaml b/.zuul.yaml
index 1d1e3c9..6ee8177 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -953,10 +953,6 @@
             irrelevant-files:
               - ^.*\.rst$
               - ^doc/.*$
-        - neutron-linuxbridge-tempest:
-            irrelevant-files:
-              - ^.*\.rst$
-              - ^doc/.*$
         - neutron-ovn-tempest-ovs-release:
             voting: false
             irrelevant-files:
@@ -994,10 +990,6 @@
             irrelevant-files:
               - ^.*\.rst$
               - ^doc/.*$
-        - neutron-linuxbridge-tempest:
-            irrelevant-files:
-              - ^.*\.rst$
-              - ^doc/.*$
         - ironic-tempest-bios-ipmi-direct-tinyipa
         - swift-dsvm-functional
         - grenade: