[libxml2] configure.ac: make AM_SILENT_RULES([yes]) unconditional

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 7bce30083a7a14681d6731c2eaef8617afe3475e
Author: David Seifert <soap gentoo org>
Date:   Sat Apr 2 16:54:29 2022 +0200

    configure.ac: make AM_SILENT_RULES([yes]) unconditional
    
    * No need to support Automake 1.10 anymore.

 configure.ac | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index f7539e8f..4c08c5f1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -41,11 +41,7 @@ AC_SUBST(LIBXML_VERSION_EXTRA)
 VERSION=${LIBXML_VERSION}
 
 AM_INIT_AUTOMAKE([1.15 foreign])
-
-# Support silent build rules, requires at least automake-1.11. Disable
-# by either passing --disable-silent-rules to configure or passing V=1
-# to make
-m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
+AM_SILENT_RULES([yes])
 
 dnl Checks for programs.
 AC_PROG_CC