Refactor: var kube_override_hostname only reserve in kubespray-defaults

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

inventory/sample/group_vars/k8s_cluster/k8s-cluster.yml

@@ -140,11 +140,7 @@ kube_proxy_nodeport_addresses: >-
   {%- endif -%}
 
 # If non-empty, will use this string as identification instead of the actual hostname
-# kube_override_hostname: >-
-#   {%- if cloud_provider is defined -%}
-#   {%- else -%}
-#   {{ inventory_hostname }}
-#   {%- endif -%}
+# kube_override_hostname: {{ inventory_hostname }}
 
 ## Encrypting Secret Data at Rest
 kube_encrypt_secret_data: false