The Liferay upgrade documentation says a best practice is to prune unnecessary data from your database before doing an upgrade. The reason this is a best practice is that the Liferay upgrade processes will typically at least verify but often update all of the records in the database. The more records you have, the longer the upgrade process will take to run. Cleaning out old and/or unnecessary records can shorten your upgrade time.

Responsive Bootstrap 1-3 Layout Template works together with Responsive Bootstrap Theme to provide Responsive site design. Although the documentation tells you it is a best practice to prune unused data, they don't tell you how to prune it properly (other than to invoke the Liferay API and never delete in the database directly).

This tool, however, does handle the pruning properly.