Stop templating kube-system namespace and creating it (#2545)

Kubernetes makes this namespace automatically, so there is
no need for kubespray to manage it.

roles/kubernetes-apps/rotate_tokens/tasks/main.yml

@@ -44,5 +44,5 @@
   when: needs_rotation
 
 - name: Rotate Tokens | Delete pods in system namespace
-  command: "{{ bin_dir }}/kubectl delete pods -n {{ system_namespace }} --all"
+  command: "{{ bin_dir }}/kubectl delete pods -n kube-system --all"
   when: needs_rotation