doc: announce removal of interactive setup script

doc: announce removal of interactive setup script

Environment configuration is the responsibility of distributions
or upper-level frameworks.
DPDK focus on documenting the requirements and some recommendations.
If some specific parts are complex, they can deserve some scripts.

Maintaining a good adaptative deployment setup is a project by itself.
Anyway this script was interactive, useful only for experimenters.

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Acked-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>