[FIX] purchase_stock: remove duplicate field

before this commit, the field incoterm_id is defined
twice in purchase.order model, i.e., in purchase and
purchase_stock modules

after this commit incoterm_id field is removed
from purchase_stock module

closes odoo/odoo#123602

Signed-off-by: William Henrotin (whe) <whe@odoo.com>

addons/purchase_stock/models/purchase.py

@@ -17,7 +17,6 @@ class PurchaseOrder(models.Model):
     def _default_picking_type(self):
         return self._get_picking_type(self.env.context.get('company_id') or self.env.company.id)
 
-    incoterm_id = fields.Many2one('account.incoterms', 'Incoterm', states={'done': [('readonly', True)]}, help="International Commercial Terms are a series of predefined commercial terms used in international transactions.")
     incoterm_location = fields.Char(string='Incoterm Location', states={'done': [('readonly', True)]})
     incoming_picking_count = fields.Integer("Incoming Shipment count", compute='_compute_incoming_picking_count')
     picking_ids = fields.Many2many('stock.picking', compute='_compute_picking_ids', string='Receptions', copy=False, store=True)