ag "delete_records?[^\(]*\('context'" | grep -v test | grep -v install
lib/accesslib.php:5483:        $DB->delete_records('context', array('id'=>$this->_id));
lib/db/upgrade.php:1181:                $DB->delete_records_select('context', "contextlevel=:contextlevel AND instanceid " . $sql, $params);
lib/db/upgrade.php:1283:                $DB->delete_records_select('context', "contextlevel=:contextlevel AND instanceid " . $sql, $params);