[REV] web: return updated list of fields in export template

This reverts commit 46016e33ea from
pull-request #129567, see #134791

closes odoo/odoo#134957

Signed-off-by: Julien Castiaux (juc) <juc@odoo.com>

addons/web/controllers/export.py

@@ -362,15 +362,7 @@ class Export(http.Controller):
     def namelist(self, model, export_id):
         # TODO: namelist really has no reason to be in Python (although itertools.groupby helps)
         export = request.env['ir.exports'].browse([export_id]).read()[0]
-        exported_fields = request.env['ir.exports.line'].browse(export['export_fields'])
-        fields = self.fields_get(model)
-
-        for invalid_fields in exported_fields.filtered(lambda f: f.name not in fields):
-            # ir.exports.line lack a ondelete=cascade foreign key on ir.model.fields
-            _logger.warning("Field %r not found for saved ir.exports of model %s, deleting", invalid_fields.name, model)
-            invalid_fields.unlink()
-
-        export_fields_list = exported_fields.read()
+        export_fields_list = request.env['ir.exports.line'].browse(export['export_fields']).read()
 
         fields_data = self.fields_info(
             model, [f['name'] for f in export_fields_list])