[FIX] intrastat_product: api.model is not necessary

TT55417

Author: juancarlosonate-tecnativa

intrastat_product/models/intrastat_product_declaration.py

@@ -922,7 +922,6 @@ def delete_xml(self):
         self.ensure_one()
         self.xml_attachment_id and self.xml_attachment_id.unlink()
 
-    @api.model
     def _xls_computation_line_fields(self):
         """
         Update list in custom module to add/drop columns or change order
@@ -948,7 +947,6 @@ def _xls_computation_line_fields(self):
             "invoice",
         ]
 
-    @api.model
     def _xls_declaration_line_fields(self):
         """
         Update list in custom module to add/drop columns or change order