Update k8s-net-calico.yml (#11113)

removed the confusing comment about defaulting to `kube_network_node_prefix` as we are not really defaulting to it when cni is Calico

inventory/sample/group_vars/k8s_cluster/k8s-net-calico.yml

@@ -19,7 +19,7 @@ calico_cni_name: k8s-pod-network
 # add default ippool name
 # calico_pool_name: "default-pool"
 
-# add default ippool blockSize (defaults kube_network_node_prefix)
+# add default ippool blockSize
 calico_pool_blocksize: 26
 
 # add default ippool CIDR (must be inside kube_pods_subnet, defaults to kube_pods_subnet otherwise)