Deleting Report Output Versions

The easiest way to deleting report output versions across reports would be to re-export and re-import the reports and unchecking the Include Report versions property while creating the export. This then deletes all report output versions that have so far been created in your production environment for the reports imported. But this works only for Public Folders reports. To delete report output versions created in users My Folders or to delete all report output versions except the last x versions you would need to use SDK.