There are a lot of Legacy database tables created by SchemaBuilder during eZ Platform installation.

eZ Platform 3.0 is a great opportunity to drop them. They will be gone from clean installations, however we don't intend to provide upgrade script as there's no way to know if some existing projects rely on these tables.

It's possible that as a part of this task some unused structures will be dropped from initial data (e.g. Setup folder as requested in DEMO-259).