Update tutorial-ingress-controller-add-on-new.md

Removed the below content

"If you are planning on using AGIC with an AKS cluster using CNI Overlay, specify the parameter --aks-custom-headers AKSHTTPCustomFeatures=Microsoft.ContainerService/AppGatewayWithOverlayPreview to configure AGIC to handle connectivity to the CNI Overlay enabled cluster."

As Per PG this is an internal hook and should not be proposed to customer.

From: [email protected] Prin PM

AKSHTTPCustomFeatures is an internal test hook, it’s not an feature.

Please do not publish it.

And external customer should not try to use that.

Author: mosuhail-vm

articles/application-gateway/tutorial-ingress-controller-add-on-new.md

@@ -60,8 +60,6 @@ az aks create -n myCluster -g myResourceGroup --network-plugin azure --enable-ma
 > [!NOTE] 
 > Please ensure the identity used by AGIC has the proper permissions. A list of permissions needed by the identity can be found here: [Configure Infrastructure - Permissions](configuration-infrastructure.md#permissions). If a custom role is not defined with the required permissions, you may use the _Network Contributor_ role.
 
->[!NOTE]
->If you are planning on using AGIC with an AKS cluster using CNI Overlay, specify the parameter `--aks-custom-headers AKSHTTPCustomFeatures=Microsoft.ContainerService/AppGatewayWithOverlayPreview` to configure AGIC to handle connectivity to the CNI Overlay enabled cluster.
 
 ```azurecli-interactive
 # Get application gateway id from AKS addon profile