PR #53 follow-up: Remove extra unneccessary loop.

tasks/master-setup.yml

@@ -7,7 +7,6 @@
     --kubernetes-version {{ kubernetes_version_kubeadm }}
     --ignore-preflight-errors={{ kubernetes_ignore_preflight_errors }}
     {{ kubernetes_kubeadm_init_extra_opts }}
-  with_items: "{{ kubernetes_pod_network }}"
   register: kubeadmin_init
   failed_when: false
   when: not kubernetes_init_stat.stat.exists