Rmoeve unnecessary type convert (#134)

broker/config.go

@@ -159,7 +159,6 @@ func LoadConfig(filename string) (*Config, error) {
 	return &config, nil
 }
 
-
 func (p *Plugins) UnmarshalJSON(b []byte) error {
 	var named NamedPlugins
 	err := json.Unmarshal(b, &named)
@@ -235,7 +234,7 @@ func NewTLSConfig(tlsInfo TLSInfo) (*tls.Config, error) {
 			return nil, err
 		}
 		pool := x509.NewCertPool()
-		ok := pool.AppendCertsFromPEM([]byte(rootPEM))
+		ok := pool.AppendCertsFromPEM(rootPEM)
 		if !ok {
 			return nil, fmt.Errorf("failed to parse root ca certificate")
 		}