Drop chech for kubelet_shutdown_grace_period (kubernetes-sigs#7993)

and kubelet_shutdown_grace_period_critical_pods as ansible cannot do
sane time interval calculations

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

@@ -150,6 +150,8 @@ kube_proxy_nodeport_addresses: >-
 kube_encrypt_secret_data: false
 
 # Graceful Node Shutdown (Kubernetes >= 1.21.0), see https://kubernetes.io/blog/2021/04/21/graceful-node-shutdown-beta/
+# kubelet_shutdown_grace_period had to be greater than kubelet_shutdown_grace_period_critical_pods to allow
+# non-critical podsa to also terminate gracefully
 # kubelet_shutdown_grace_period: 60s
 # kubelet_shutdown_grace_period_critical_pods: 20s
 

roles/kubernetes/preinstall/tasks/0020-verify-settings.yml

@@ -107,13 +107,6 @@
     - not ignore_assert_errors
     - inventory_hostname in groups['kube_node']
 
-- name: Stop when ShutdownGracePeriod less than ShutdownGracePeriodCriticalPods
-  assert:
-    that: kubelet_shutdown_grace_period > kubelet_shutdown_grace_period_critical_pods
-    msg: "ShutdownGracePeriod ({{ kubelet_shutdown_grace_period }}) needs to be greater than ShutdownGracePeriodCriticalPods ({{ kubelet_shutdown_grace_period_critical_pods }}) in order to give normal pods time to be evacuated, please see https://kubernetes.io/blog/2021/04/21/graceful-node-shutdown-beta/ for details"
-  when:
-    - kube_version is version('v1.21.0', '>=')
-
 - name: Stop when dynamic_kubelet_configuration enabled for kubernetes >= 1.22
   assert:
     that: not dynamic_kubelet_configuration