waf: install: Remove installation of PIDL and manpages.

It's not used outside of Samba other than wireshark
who have their own vendor fork.

Signed-off-by: Lutz Justen <ljusten@google.com>
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Tue Apr 23 02:08:56 UTC 2019 on sn-devel-144