In Sakai 2.9 we put in the new drag-and-drop site order preferences. We kept the Sakai 2.8 preferences tool in case we needed to revert. But now that we are on the cusp of Sakai 11 - it is long past time to remove this unused 2.8 code that probably no longer even works.
This also removes
Preference from sakai.properties - I doubt anyone used it anyways. It has not been tested since 2.8