This script at present does the simple thing - it looks through notifications for activity and tries to identify trivially ignorable notifications which:
1. Relate to a closed (merged or abandoned) PR
2. Does not have an outstanding review request against EITHER the user OR one of the user's teams (someone else already reviewed it) AND is in an org in the `org_shitlist`
Note that the `org_shitlist` serves as a gate to allow you to opt notifications from organizations into auto-dismissal, rather than auto-dismissing anything you aren't a reviewer on from anywhere as that covers many other potentially desirable notifications too.