remove unused handlers in cilium roles (#7414)

roles/network_plugin/cilium/handlers/main.yml

----
-- name: restart kubelet
-  command: /bin/true
-  notify:
-    - Kubelet | reload systemd
-    - Kubelet | reload kubelet
-
-- name: Kubelet | reload systemd
-  systemd:
-    daemon_reload: true
-
-- name: Kubelet | reload kubelet
-  service:
-    name: kubelet
-    state: restarted