[libxml2] Remove wrong tarname from AC_INIT

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 97fe12791a2509302e590f0c1b3bba077a64637b
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Thu Jan 20 16:08:35 2022 +0100

    Remove wrong tarname from AC_INIT
    
    Remove the "tarname" added in commit 7c0253aa. Having a tarname
    including a version number would result in tarballs named
    libxml2-2.9.12-2.9.12.tar.gz.
    
    This change also means that documentation will now be installed in
    $(datadir)/doc/libxml2 instead of $(datadir)/doc/libxml2-$(version).
    Having a version number in the documentation directory doesn't seem
    helpful. The new location also matches the default autotools $(docdir).

 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/configure.ac b/configure.ac
index 6c5a2d44..45e1df45 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5,7 +5,7 @@ m4_define([MAJOR_VERSION], 2)
 m4_define([MINOR_VERSION], 9)
 m4_define([MICRO_VERSION], 12)
 
-AC_INIT([libxml2],[MAJOR_VERSION.MINOR_VERSION.MICRO_VERSION],[],[libxml2-MAJOR_VERSION.MINOR_VERSION.MICRO_VERSION])
+AC_INIT([libxml2],[MAJOR_VERSION.MINOR_VERSION.MICRO_VERSION])
 AC_CONFIG_SRCDIR([entities.c])
 AC_CONFIG_HEADERS([config.h])
 AM_MAINTAINER_MODE([enable])