removing toc item to remote doc per PM

Author: Blackmist

articles/ai-studio/toc.yml

@@ -315,9 +315,8 @@ items:
     - name: Configure managed network
       href: how-to/configure-managed-network.md
     - name: Configure private link
+      displayName: custom dns
       href: how-to/configure-private-link.md
-    - name: Configure custom DNS
-      href: /azure/machine-learning/how-to-custom-dns?context=/azure/ai-studio/context/context
     - name: Secure playground chat
       href: how-to/secure-data-playground.md
     - name: Troubleshoot secure project connectivity