docs: remove Basic LB known issue from ASH page (#5025)

docs/topics/azure-stack.md

@@ -375,17 +375,13 @@ The list below includes the addons currently unsupported on Azure Stack Hub:
 ### OSProfile exceeds maximum characters length error
 
 Addons enabled in the API Model are Base64 encoded and included in the VMs ARM template. There is a length limit of 87380 characters for the custom data, thus if too many addons are enabled in the API Model, the `aks-engine` operations could fail with the below error:
-```
+
+```console
 Custom data in OSProfile must be in Base64 encoding and with a maximum length of 87380 characters
 ```
+
 In such cases, try reduce the number of enabled addons or remove all of them in the API Model.
 
-### Limited Number of Frontend Public IPs
-
-The `Basic` load balancer SKU available on Azure Stack Hub limits the number of frontend IPs to 5. That implies that each cluster's agents pool is limited to 5 public IPs.
-
-If you need to expose more than 5 services, then the recommendation is to route traffic to those services using an Ingress controller.
-
 ### get-versions command
 
 By default, `aks-engine get-versions` shows which Kubernetes versions are supported by each AKS Engine release on Azure's public cloud. Include flag `--azure-env` to get the list of supported Kubernetes versions on a custom cloud such as an Azure Stack Hub cloud (`aks-engine get-versions --azure-env AzureStackCloud`). Upgrade paths for Azure Stack Hub can also be found [here](https://docs.microsoft.com/azure-stack/user/kubernetes-aks-engine-release-notes).