Update toc.yml

Author: jlichwa

articles/key-vault/secrets/toc.yml

@@ -18,8 +18,6 @@ items:
     href: quick-create-portal.md
   - name: .NET
     href: quick-create-net.md
-  - name: .NET (v3)
-    href: /previous-versions/azure/key-vault/quick-create-net-v3?toc=/azure/key-vault/secrets/toc.json&bc=/azure/key-vault/breadcrumb/toc.json
   - name: Node.js
     href: quick-create-node.md
     displayName: az ad sp create-for-rbac, az keyvault set-policy