A mail alias is still linked with the res.users model with 2 fields, alias_id
and alias_contact (related). It is not used anymore. We can therefore remove
those fields.
Aliases were added at 052f2ace57 . Purpose was to be able to discuss with
users directly using Odoo as a mailbox. However it was not usable and was
quickly deactivated. Aliases on res.users was removed at 029d1baf35 . It was
decided at that time to not support alias on users anymore as it was creating
more issues than adding communication facility.
This commit finally removes the unused fields. If necessary in some custom
flow they can always be added through studio.
LINKS
Task ID 1919277
Community PR odoo/odoo#41160
Enterprise PR odoo/enterprise#6983
Upgrade PR odoo/upgrade#872
Co-Authored-By: Rémy Voet <ryv@odoo.com>
Co-Authored-By: Thibault Delavallée <tde@odoo.com>
