fixes

Author: asudbring

articles/virtual-network/how-to-multiple-prefixes-subnet.md

@@ -45,8 +45,6 @@ If you choose to install and use PowerShell locally, this article requires the A
 
 # [CLI](#tab/cli)
 
-[!INCLUDE [azure-cli-prepare-your-environment-no-header.md](~/articles/reusable-content/azure-cli/azure-cli-prepare-your-environment-no-header.md)]
-
 - The how-to article requires version 2.31.0 or later of the Azure CLI. If using Azure Cloud Shell, the latest version is already installed.
 
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articles/virtual-network/toc.yml

@@ -138,8 +138,6 @@
         href: manage-route-table.yml
     - name: Manage NICs
       href: virtual-network-network-interface.md
-    - name: Manage virtual network
-      href: manage-virtual-network.md
     - name: Create a subnet with multiple prefixes
       href: how-to-multiple-prefixes-subnet.md
     - name: Manage virtual network