Applications can be cancelled by an admin. Detailed steps to cancel applications can be found here: How can I delete or remove an application?
However, for audit purposes, it is not possible to completely delete or remove an application from your system. We understand that this can sometimes not be ideal, because it might clutter up your view. However, we believe that transparency and auditability is very important, and not something we should compromise on.
(Think about the case when 3 years down the line an upset parent comes with an email confirmation of the submitted application, you go to the system and but can't find it, and you do not have access to the old office manager from the school who has retired since).