Schedules for deletion the current PDF and all text and translations associated with it and removes the PDF from the user's account. Until purged from the system the PDF is still accessible to system administrators. The system purges deleted PDFs once every 24 hours.
The current PDF may be changed using the set_target_id call prior to calling this function.
A 2-tuple of (success, details) where success is a bool and details is a string.