[libxml2] Remove vestigial de-ANSI-fication support.

[Javier JardÃn <jjardon src gnome org>]

commit eacf6bc627bab2255969631b071efe1ec8c269d9
Author: Javier JardÃn <jjardon gnome org>
Date:   Mon Apr 2 18:13:23 2012 +0100

    Remove vestigial de-ANSI-fication support.
    
    configure.ac (AM_C_PROTOTYPES): Remove call to this macro.
    The support for automatic de-ANSI-fication has been deprecated in
    automake 1.11.2, and will be removed altogether in automake 1.12.0

 configure.in |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)
---
diff --git a/configure.in b/configure.in
index 8d2153f..8183860 100644
--- a/configure.in
+++ b/configure.in
@@ -68,10 +68,6 @@ AC_PATH_PROG(WGET, wget, /usr/bin/wget)
 AC_PATH_PROG(XMLLINT, xmllint, /usr/bin/xmllint)
 AC_PATH_PROG(XSLTPROC, xsltproc, /usr/bin/xsltproc)
 
-dnl Make sure we have an ANSI compiler
-AM_C_PROTOTYPES
-test "x$U" != "x" && AC_MSG_ERROR(Compiler not ANSI compliant)
-
 AC_LIBTOOL_WIN32_DLL
 AM_PROG_LIBTOOL