Refactor: use kubeadm_config_api_version variable

I added the kubeadm_config_api_version variable in the previous commit,
and remove kubeadm api version condition.

Signed-off-by: ChengHao Yang <17496418+tico88612@users.noreply.github.com>

roles/kubernetes/control-plane/tasks/kubeadm-setup.yml

@@ -88,13 +88,9 @@
     kubeadm_config_api_fqdn: "{{ apiserver_loadbalancer_domain_name | default('lb-apiserver.kubernetes.local') }}"
   when: loadbalancer_apiserver is defined
 
-- name: Set kubeadm api version to v1beta3
-  set_fact:
-    kubeadmConfig_api_version: v1beta3
-
 - name: Kubeadm | Create kubeadm config
   template:
-    src: "kubeadm-config.{{ kubeadmConfig_api_version }}.yaml.j2"
+    src: "kubeadm-config.{{ kubeadm_config_api_version }}.yaml.j2"
     dest: "{{ kube_config_dir }}/kubeadm-config.yaml"
     mode: "0640"