test.winehq.org already sets $CGI::POST_MAX to reject oversize reports.
Furthermore truncated reports are rejected anyway.
So avoid the code duplication and inconsistencies between the winetest
and test.winehq.org (or other site) size limits.
Signed-off-by: Francois Gouget <fgouget@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>