m4/pretty_print.m4: drop support for "with_*" variables

m4/pretty_print.m4

 AC_DEFUN([results], [
-	dnl This is a hack to allow "with" names, otherwise "enable".
-	num=`expr $1 : 'with'`
-	if test "$num" != "0"; then
-		var="`echo '$'$1`"
-	else
-		var="`echo '$'enable_$1`"
-	fi
+	var="`echo '$'enable_$1`"
 
 	printf '('
 	if eval "test x$var = xyes"; then
 		printf '+'
-	elif test -n "$3" && eval "test x$var = x$3"; then
-		printf '+'
 	else
 		printf '-'
 	fi