Remove useless call to 'kubeadm version'

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

roles/kubernetes/kubeadm/tasks/main.yml

@@ -52,11 +52,6 @@
     kubeadm_token: "{{ temp_token.stdout }}"
   when: kubeadm_token is not defined
 
-- name: Get the kubeadm version
-  command: "{{ bin_dir }}/kubeadm version -o short"
-  register: kubeadm_output
-  changed_when: false
-
 - name: Set kubeadm api version to v1beta2
   set_fact:
     kubeadmConfig_api_version: v1beta2