web_server: Remove the unused Python WSGI web server
SWAT was removed in Samba 4.1 and there isn't any reason to keep a web
server in our codebase. The web server was not turned on by default.
The web server plainly does not hold up to modern web server standards
and allows for resource exhaustion (and probably generally has bugs).
Credit goes to Michael Hanselmann for prompting us to remove this
service entirely.
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Jeremy Allison <jra@samba.org>