hafas-m: use VRN by default

bin/hafas-m

@@ -79,17 +79,7 @@ if ($list_services) {
 	exit 0;
 }
 
-if ( not $service ) {
-	say STDERR 'Note: You have called hafas-m without specifying a service.';
-	say STDERR q{};
-	say STDERR 'Unfortunately, the previous default service (DB HAFAS)';
-	say STDERR 'is no more, and there is no generic replacement available.';
-	say STDERR q{};
-	say STDERR 'Please use "hafas-m --list" to list supported services,';
-	say STDERR 'and then select one via -s <service>.';
-	say STDERR 'Falling back to ÖBB for now.';
-	$service = 'ÖBB';
-}
+$service //= 'VRN';
 
 if ($use_cache) {
 	my $cache_path = ( $ENV{XDG_CACHE_HOME} // "$ENV{HOME}/.cache" )