Remove jammy test job due to updated runtime support

Ubuntu 22.04 (Jammy) has been removed from the supported linux distribution. Remove the test job to avoid confusion.

Change-Id: If7abd95b51450e4447dbc66266288ea5affdaf2d
Signed-off-by: Kota Asai <kota.asai@ntt.com>

.zuul.yaml

@@ -58,13 +58,6 @@
       Masakari functional tests job based on devstack (two-node).
     nodeset: openstack-two-node-noble
 
-- job:
-    name: masakari-functional-devstack-multinode-jammy
-    parent: masakari-functional-devstack
-    description: |
-      Masakari functional tests job based on devstack (Jammy two-node).
-    nodeset: openstack-two-node-jammy
-
 - job:
     name: masakari-functional-devstack-ipv6
     # NOTE(yoctozepto): The devstack job does not support multinode IPv6 yet.
@@ -96,13 +89,11 @@
       jobs:
         - openstack-tox-linters
         - masakari-functional-devstack-multinode
-        - masakari-functional-devstack-multinode-jammy
         - masakari-functional-devstack-ipv6
     gate:
       jobs:
         - openstack-tox-linters
         - masakari-functional-devstack-multinode
-        - masakari-functional-devstack-multinode-jammy
         - masakari-functional-devstack-ipv6
     periodic:
       jobs: