Removed an include per Kumud's instructions.

Author: DennisLee-DennisLee

articles/virtual-network/virtual-network-manage-subnet.md

@@ -21,8 +21,6 @@ Learn how to add, change, or delete a virtual network subnet. All Azure resource
 
 ## Before you begin
 
-[!INCLUDE [updated-for-az](../../includes/updated-for-az.md)]
-
 If you don't have one, set up an Azure account with an active subscription. [Create an account for free](https://azure.microsoft.com/free/?ref=microsoft.com&utm_source=microsoft.com&utm_medium=docs&utm_campaign=visualstudio). Then complete one of these tasks before starting steps in any section of this article: 
 
 - **Portal users**: Sign in to the [Azure portal](https://portal.azure.com) with your Azure account.