This deletes a big ol' chunk of code related to letters. It's not everything—there are still a few things that might be tied to sms/email—but it's the the heart of letters function. SMS and email function should be untouched by this.
Areas affected:
- Things obviously about letters
- PDF tasks, used for precompiling letters
- Virus scanning, used for those PDFs
- FTP, used to send letters to the printer
- Postage stuff
If the request is for the big numbers on the activity page, then we need to use the number right number of days.
Added an end point to get the data retention for the service and notification type, which is needed on the activity page to say how long the report is available for.
