Remove k8s hooks for versions prior to 1.20 (#7998)

roles/kubernetes-apps/cloud_controller/oci/templates/oci-cloud-provider.yml.j2

@@ -36,11 +36,7 @@ spec:
       hostNetwork: true
       dnsPolicy: ClusterFirstWithHostNet
       nodeSelector:
-{% if kube_version is version('v1.20.0', '<') %}
-        node-role.kubernetes.io/master: ""
-{% else %}
         node-role.kubernetes.io/control-plane: ""
-{% endif %}
       tolerations:
       - key: node.cloudprovider.kubernetes.io/uninitialized
         value: "true"