Delete nservicebus/upgrades/absdatabus-4to5.md (#7797)

* Delete nservicebus/upgrades/absdatabus-4to5.md

Deletes empty upgrade guide.

* Update menu.yaml

Author: tamararivera

menu/menu.yaml

@@ -283,8 +283,6 @@
       Url: nservicebus/upgrades/azure-deprecation
     - Title: Azure BlobStorage Data Bus
       Articles:
-      - Url: nservicebus/upgrades/absdatabus-4to5
-        Title: Version 4 to 5
       - Url: nservicebus/upgrades/absdatabus-3to4
         Title: Version 3 to 4
       - Url: nservicebus/upgrades/absdatabus-2to3