return
	}

	cfg, err := readServerConfig(ctx, objectAPI, nil)
	if err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}

	if err = cfg.DelFrom(bytes.NewReader(kvBytes)); err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}

	if err = validateConfig(ctx, cfg, subSys); err != nil {

		if kv.Key == key {
			return kv.Value, true
		}
	}
	return "", false
}

// Config - MinIO server config structure.
type Config map[string]map[string]KVS

// DelFrom - deletes all keys in the input reader.
func (c Config) DelFrom(r io.Reader) error {
	scanner := bufio.NewScanner(r)
	for scanner.Scan() {
		// Skip any empty lines, or comment like characters
		text := scanner.Text()