Cleanup deprecated labels beta.kubernetes.io/arch and beta.kubernetes.io/os (#5964)

roles/kubernetes-apps/ingress_controller/alb_ingress_controller/templates/alb-ingress-clusterrole.yml.j2

@@ -1,5 +1,5 @@
 ---
-apiVersion: rbac.authorization.k8s.io/v1beta1
+apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRole
 metadata:
   name: alb-ingress

roles/kubernetes-apps/ingress_controller/alb_ingress_controller/templates/alb-ingress-clusterrolebinding.yml.j2

@@ -1,5 +1,5 @@
 ---
-apiVersion: rbac.authorization.k8s.io/v1beta1
+apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRoleBinding
 metadata:
   name: alb-ingress

roles/kubernetes-apps/ingress_controller/ingress_nginx/README.md

@@ -37,9 +37,6 @@ The following **Mandatory Command** is required for all deployments.
 kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/static/mandatory.yaml
 ```
 
-!!! tip
-    If you are using a Kubernetes version previous to 1.14, you need to change `kubernetes.io/os` to `beta.kubernetes.io/os` at line 217 of [mandatory.yaml](https://github.com/kubernetes/ingress-nginx/blob/master/deploy/static/mandatory.yaml#L217), see [Labels details](https://kubernetes.io/docs/reference/kubernetes-api/labels-annotations-taints/).
-
 ### Provider Specific Steps
 
 There are cloud provider specific yaml files.

roles/kubernetes-apps/ingress_controller/ingress_nginx/defaults/main.yml

@@ -3,7 +3,7 @@ ingress_nginx_namespace: "ingress-nginx"
 ingress_nginx_host_network: false
 ingress_publish_status_address: ""
 ingress_nginx_nodeselector:
-  beta.kubernetes.io/os: "linux"
+  kubernetes.io/os: "linux"
 ingress_nginx_tolerations: []
 ingress_nginx_insecure_port: 80
 ingress_nginx_secure_port: 443