in classes/privacy/provider.php [160:179]
public static function delete_feedback_for_grades(assign_plugin_request_data $deletedata) {
global $DB;
if (empty($deletedata->get_gradeids())) {
return;
}
list($sql, $params) = $DB->get_in_or_equal($deletedata->get_gradeids(), SQL_PARAMS_NAMED);
$fs = new \file_storage();
$fs->delete_area_files_select(
$deletedata->get_context()->id,
'assignfeedback_onenote',
\local_onenote\api\base::ASSIGNFEEDBACK_ONENOTE_FILEAREA,
$sql,
$params
);
$params['assignment'] = $deletedata->get_assignid();
$DB->delete_records_select('assignfeedback_onenote', "assignment = :assignment AND grade $sql", $params);
}