fsearchuserfield filter removed with no upgrade

The fsearchuserfield filter (configurable_reports/components/filters/fsearchuserfield) was present in version 2.2 (2011040105) but is not present in v2.3.4 (2011040115) so any reports that used this field fail generating a blank page only. If you turn debugging on in Moodle you get an error like:

Fatal error: require_once(): Failed opening required '/var/www/html/moodle27/moodle/blocks/configurable_reports/components/filters/fsearchuserfield/plugin.class.php' (include_path='/var/www/html/moodle27/moodle/lib/zend:/var/www/html/moodle27/moodle/lib/pear:.:/usr/share/pear:/usr/share/php') in /var/www/html/moodle27/moodle/blocks/configurable_reports/report.class.php on line 392

If this filter was intentionally removed I'd expect some upgrade process to migrate reports that use it.