Drop openstack-*-node-bionic nodeset definitions

In order to be able to edit these on the master branch, we need to drop
them on the stable branches first.

NOTE(elod.illes): this is a partial backport from unmaintained/2023.1,
or actually this is the original patches that were merged onto stable
branches, as the rest of the workarounds from the 2023.1 patch is not
needed here.

Signed-off-by: Dr. Jens Harbott <harbott@osism.tech>
Change-Id: Ibf1bf5454a4dd63b617963b70ce9bfec83de4916
(cherry picked from commit e5e266335e)
(cherry picked from commit 3219be6c4b)
(cherry picked from commit 47991c31eb)

.zuul.yaml

@@ -18,16 +18,6 @@
         nodes:
           - controller
 
-- nodeset:
-    name: openstack-single-node-bionic
-    nodes:
-      - name: controller
-        label: ubuntu-bionic
-    groups:
-      - name: tempest
-        nodes:
-          - controller
-
 - nodeset:
     name: devstack-single-node-centos-9-stream
     nodes:
@@ -108,36 +98,6 @@
         nodes:
           - compute1
 
-- nodeset:
-    name: openstack-two-node-bionic
-    nodes:
-      - name: controller
-        label: ubuntu-bionic
-      - name: compute1
-        label: ubuntu-bionic
-    groups:
-      # Node where tests are executed and test results collected
-      - name: tempest
-        nodes:
-          - controller
-      # Nodes running the compute service
-      - name: compute
-        nodes:
-          - controller
-          - compute1
-      # Nodes that are not the controller
-      - name: subnode
-        nodes:
-          - compute1
-      # Switch node for multinode networking setup
-      - name: switch
-        nodes:
-          - controller
-      # Peer nodes for multinode networking setup
-      - name: peers
-        nodes:
-          - compute1
-
 - nodeset:
     name: openstack-three-node-focal
     nodes:
@@ -173,41 +133,6 @@
           - compute1
           - compute2
 
-- nodeset:
-    name: openstack-three-node-bionic
-    nodes:
-      - name: controller
-        label: ubuntu-bionic
-      - name: compute1
-        label: ubuntu-bionic
-      - name: compute2
-        label: ubuntu-bionic
-    groups:
-      # Node where tests are executed and test results collected
-      - name: tempest
-        nodes:
-          - controller
-      # Nodes running the compute service
-      - name: compute
-        nodes:
-          - controller
-          - compute1
-          - compute2
-      # Nodes that are not the controller
-      - name: subnode
-        nodes:
-          - compute1
-          - compute2
-      # Switch node for multinode networking setup
-      - name: switch
-        nodes:
-          - controller
-      # Peer nodes for multinode networking setup
-      - name: peers
-        nodes:
-          - compute1
-          - compute2
-
 - job:
     name: devstack-base
     parent: multinode