If you requested a database backup before, you can request its deletion later. To do this, open a new case online and include the title of this article along with these details:
The reference number of the original ticket.
The name of the backup (if you know it).
The location of the backup (if you know it).
The environment the backup's related to, example Mosprod, Mosrep, Mostest.
The reason for the deletion.