Remove doc from TOC

Author: lgayhardt

articles/machine-learning/v1/toc.yml

@@ -443,8 +443,5 @@
       href: ../migrate-rebuild-integrate-with-client-app.md
     - name: Rebuild Execute R Script components
       href: ../migrate-execute-r-script.md
-  - name: What happened to Workbench
-    displayName: desktop, ui, Workbench, upgrade, update, transfer
-    href: ../overview-what-happened-to-workbench.md
 - name: Python SDK (v1) release notes
   href: azure-machine-learning-release-notes.md