Revert "[FIX] mass_mailing: unsubscribe not working in multi lang"
Revert "[FIX] mass_mailing: unsubscribe not working in multi lang"

commit a3ab33f2121c487920d370675d0e1a32dfc96c65 introduced invalid code

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo