Now that recipients in notification process are always partners due to simplification of MailFollower model we can safely simplify the structure used to collect and propagate recipients information. Before this task it was a dictionary with a list of partner related data and a list of channel related data. It is now simply a list of partner related data, leading to various code cleaning. LINKS Task ID-2070632 (main task) Task ID-2419762 (followup task) COM PR odoo/odoo#62859 ENT PR odoo/enterprise#15172 UPG PR odoo/upgrade#2005