evas: make no longer supported object, legacy only.

evas: make no longer supported object, legacy only.

So I forgot to clean my hard drive from previously generated files,
and obviously everything still worked. This lead to having to roll back
evas_smart_clipped.eo as a public eo object until we merge elementary.

Still I would like someone to take a look at elm_pan.eo and figure out
how to not rely on smart clipped there.