pidl/ws: Remove #pragma warning (MSVC)

pidl/ws: Remove #pragma warning (MSVC)

Port Wireshark commit ceda0f9

Author: Alexis La Goutte <alexis.lagoutte@gmail.com>
Date:   Sun Oct 5 19:34:46 2014 +0200

    Remove #pragma warning (MSVC) for PIDL generate dissector

    Change-Id: I1e4c7944a2cd877f5c707703dcff44fe9f955a2c
    Reviewed-on: https://code.wireshark.org/review/4479
    Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>