Rollback Email deferred notification for Task state changes (notification email design changes have broken this functionality) and also comment out code for Add Member as new rules do not generate email notification for Add/Remove member.
Remove code related to Add/Remove member as email notification rule design have changed
Merge pull request #1817 from reciprocity/hotfix/rollback_email_deferred_email_taskrelated

Rollback Email deferred notification for Task state (Declined) changes