[delete] delete user_second_id field after data migration

models/account.py

@@ -10,9 +10,6 @@ class AccountInvoice(models.Model):
     # ------------------------------------------------------
     # Fields declaration
     # ------------------------------------------------------
-    user_second_id = fields.Many2one(
-        comodel_name='res.users',
-        string='Spécialiste')
     user_second_ids = fields.Many2many(
         comodel_name='res.users',
         column1='invoice_id',

models/sale.py

@@ -10,9 +10,6 @@ class SaleOrder(models.Model):
     # ------------------------------------------------------
     # Fields declaration
     # ------------------------------------------------------
-    user_second_id = fields.Many2one(
-        comodel_name='res.users',
-        string='Spécialiste')
     user_second_ids = fields.Many2many(
         comodel_name='res.users',
         column1='order_id',