sharepoint online – Delete locked file in form templates

I can not delete a locked file because it indicates that it was extracted by a user. We verified that the only user with access did NOT open it or extract it. This is in the Library & # 39; Form Templates & # 39; that can not be removed from the browser.

I've also looked into the settings of the library "Manage files that do not have an archived version", but nothing is indicated there. Any ideas on how to delete this file and / or this library? Powershell or another workaround?

enter the description of the image here