Administrators can delete folders if they contain no reports.
To access the admin interface of VisualScript in Jira, click on "Settings" then "Apps". In Confluence, click on "Settings". You should see VisualScript with the option to "Create/Edit Reports".
Click on "Create/Edit Reports", you'll see a list of reports organized into folders.
To delete a folder, first move or delete all reports inside that folder.
Once the folder is empty, you can right click on it and delete it.
You can't delete the root folders for "My Reports" or "Built-In Reports."