Added Retiremenr Banner

Author: Sreekanth Iyer (Ushta Te Consultancy Services)

articles/hdinsight-aks/whats-new.md

@@ -11,8 +11,6 @@ ms.date: 03/24/2024
 [!INCLUDE [retirement-notice](includes/retirement-notice.md)]
 [!INCLUDE [feature-in-preview](includes/feature-in-preview.md)]
 
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 In HDInsight on AKS, all cluster management and operations have native support for [service management](./service-configuration.md) on Azure portal for individual clusters. 
 
 In HDInsight on AKS, two new concepts are introduced: