removed Manage offers node

Author: dannyevers

articles/marketplace/TOC.yml

@@ -229,8 +229,6 @@
         href: azure-vm-faq.yml
       - name: VM certification troubleshooting
         href: azure-vm-certification-faq.yml
-    - name: Manage the offer
-      items:
       - name: Update core sizes
         href: azure-vm-plan-manage.md
   - name: Consulting services offer