[#33739] We don't need to require format

http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=33739&start=0

Raw is already default in the switch/case and therefore isn't needed to be passed in. It also didn't throw an exception on introduction in 3.2 (so technically a b/c break when the exception was introduced)