Remove ovn4nfv support (#8265)

roles/network_plugin/ovn4nfv/tasks/main.yml

@@ -1,15 +0,0 @@
----
-- name: ovn4nfv | Label control-plane node
-  command: >-
-    {{ bin_dir }}/kubectl label --overwrite node {{ groups['kube_control_plane'] | first }} ovn4nfv-k8s-plugin=ovn-control-plane
-  when:
-    - inventory_hostname == groups['kube_control_plane'][0]
-
-- name: ovn4nfv | Create ovn4nfv-k8s manifests
-  template:
-    src: "{{ item.file }}.j2"
-    dest: "{{ kube_config_dir }}/{{ item.file }}"
-  with_items:
-    - {name: ovn-daemonset, file: ovn-daemonset.yml}
-    - {name: ovn4nfv-k8s-plugin, file: ovn4nfv-k8s-plugin.yml}
-  register: ovn4nfv_node_manifests