configure.ac: Remove AC_PROG_RANLIB

It was obsoleted by libtool and we don't use ranlib standalone.

Signed-off-by: Ruben Kerkhof <ruben@rubenkerkhof.com>
Reviewed-by: Jan Friesse <jfriesse@redhat.com>

configure.ac

@@ -85,7 +85,6 @@ AC_PROG_CXX
 AC_PROG_INSTALL
 AC_PROG_LN_S
 AC_PROG_MAKE_SET
-AC_PROG_RANLIB
 AC_PROG_SED
 AC_PROG_LIBTOOL