// responds 500 to all requests. ErrorHandler itself logs the given
// error once, and the handler logs it again for each incoming
// request.
-func ErrorHandler(ctx context.Context, _ *arvados.Cluster, _ *arvados.NodeProfile, err error) Handler {
+func ErrorHandler(ctx context.Context, _ *arvados.Cluster, err error) Handler {
logger := ctxlog.FromContext(ctx)
logger.WithError(err).Error("unhealthy service")
return errorHandler{err, logger}