[IMP] l10n_xx: use country_code field

l10n_latam_country_code field is no more needed for account.move
object thanks to commit 7edb5c11

Also, since country_code field has been defined in view_move_form,
no need to redefine it when it is inherited in l10n_cn module.

closes odoo/odoo#48719

Task: 2228210
Signed-off-by: Josse Colpaert <jco@openerp.com>

addons/l10n_ar/views/account_move_view.xml

@@ -23,7 +23,7 @@
         <field name="arch" type="xml">
 			<group id="other_tab_group" position="inside">
                 <group name="afip_group" string="AFIP">
-                    <field name='l10n_ar_afip_concept' attrs="{'invisible': ['|', ('l10n_latam_country_code', '!=', 'AR'), ('l10n_latam_use_documents', '=', False)]}"/>
+                    <field name='l10n_ar_afip_concept' attrs="{'invisible': ['|', ('country_code', '!=', 'AR'), ('l10n_latam_use_documents', '=', False)]}"/>
                     <label for="l10n_ar_afip_service_start" attrs="{'invisible':[('l10n_ar_afip_concept','not in',['2', '3', '4'])]}" string="Service Date"/>
                     <div attrs="{'invisible':[('l10n_ar_afip_concept','not in',['2', '3', '4'])]}">
                         <field name="l10n_ar_afip_service_start" class="oe_inline"/> to <field name="l10n_ar_afip_service_end" class="oe_inline"/>

addons/l10n_cn/views/account_move_view.xml

@@ -7,7 +7,6 @@
             <field name="inherit_id" ref="account.view_move_form"/>
             <field name="arch" type="xml">
                 <xpath expr="//field[@name='ref']" position="after">
-                    <field name="country_code" invisible='1'/>
                     <field name="move_type" invisible='1'/>
                     <field name="fapiao" attrs="{'invisible': ['|', ('country_code','!=', 'CN'),
                         ('move_type', 'not in', ['out_invoice', 'out_refund', 'in_invoice', 'in_refund'])]}"/>

addons/l10n_latam_invoice_document/models/account_move.py

@@ -18,8 +18,6 @@ class AccountMove(models.Model):
         'l10n_latam.document.type', string='Document Type', readonly=False, auto_join=True, index=True,
         states={'posted': [('readonly', True)]}, compute='_compute_l10n_latam_document_type', store=True)
     l10n_latam_use_documents = fields.Boolean(related='journal_id.l10n_latam_use_documents')
-    l10n_latam_country_code = fields.Char(
-        related='company_id.country_id.code', help='Technical field used to hide/show fields regarding the localization')
 
     @api.model
     def _deduce_sequence_number_reset(self, name):

addons/l10n_latam_invoice_document/views/account_move_view.xml

@@ -37,7 +37,6 @@
             <form>
                 <field name="l10n_latam_available_document_type_ids" invisible="1"/>
                 <field name="l10n_latam_use_documents" invisible="1"/>
-                <field name="l10n_latam_country_code" invisible="1"/>
             </form>
 
             <field name="journal_id" position="after">