Plone has lots of features. collective.remove is a project to remove some features from Plone and be usefull to integrators.
Why ? My customer don’t need them and for performance purpose, it’s good to remove things not used.
What ? This project has three eggs at the moment:

collective.remove.kss
collective.remove.kupu
collective.remove.rules

To know what to remove, it’s per project need. [...]