[IMP] removing 'FOR UPDATE NOWAIT' as ROW EXCLUSIVE lock is already acquired by DELETE and INSERT

http://www.postgresql.org/docs/9.2/static/explicit-locking.html

base_location_geonames_import/wizard/geonames_import.py

@@ -86,8 +86,6 @@ class better_zip_geonames_import(models.TransientModel):
                 % (res_request.status_code, url))
         bzip_ids_to_delete = bzip_obj.search([('country_id', '=', country_id)])
         if bzip_ids_to_delete:
-            self.env.cr.execute('SELECT id FROM res_better_zip WHERE id in %s '
-                'FOR UPDATE NOWAIT', (tuple(bzip_ids_to_delete), ))
             bzip_obj.unlink(bzip_ids_to_delete)
             logger.info(
                 '%d better zip entries deleted for country %s'