[IMP] point_of_sale: move barcode field into base

The field was already declared in base but added in the view in point_of_sale
only.

Remove the duplicated field definition on the model.

Closes #25070
Fixes #13544

addons/point_of_sale/models/res_partner.py

@@ -6,7 +6,6 @@ from odoo import api, fields, models
 class ResPartner(models.Model):
     _inherit = 'res.partner'
 
-    barcode = fields.Char(string='Barcode', oldname='ean13')
     pos_order_count = fields.Integer(
         compute='_compute_pos_order',
         help="The number of point of sales orders related to this customer",

addons/point_of_sale/views/res_partner_view.xml

@@ -14,11 +14,6 @@
                         <field string="POS Sales" name="pos_order_count" widget="statinfo"/>
                     </button>
                 </div>
-                <xpath expr="//page[@name='sales_purchases']/group">
-                    <group string="Point of Sale" name="point_of_sale">
-                        <field name="barcode" />
-                    </group>
-                </xpath>
             </field>
         </record>
         <record id="view_partner_pos_kanban" model="ir.ui.view">

odoo/addons/base/views/res_partner_views.xml

@@ -380,6 +380,7 @@
                                 </group>
                                 <group string="Misc">
                                     <field name="ref"/>
+                                    <field name="barcode"/>
                                     <field name="company_id" groups="base.group_multi_company" options="{'no_create': True}"/>
                                     <field name="industry_id" attrs="{'invisible': [('is_company', '=', False)]}" options="{'no_create': True}"/>
                                 </group>