[libxml2] configure: acconfig.h is deprecated since autoconf-2.50

[Stefan Kost <stefkost src gnome org>]

commit a46b2357239aea4610c4562f59f2936af77880aa
Author: Stefan Kost <ensonic users sf net>
Date:   Tue May 10 11:53:58 2011 +0300

    configure: acconfig.h is deprecated since autoconf-2.50
    
    Remove deprecated file (leftover from autoconf-2.13). The generated config.h is
    the same as we already use the 3-arg versions of AC_DEFINE.

 acconfig.h |   16 ----------------
 1 files changed, 0 insertions(+), 16 deletions(-)