fix race condition

connector/relay/metadata.go

@@ -10,10 +10,6 @@ import (
 	"github.com/google/uuid"
 )
 
-const (
-	defaultMuxVersion = 1
-)
-
 type metadata struct {
 	connectTimeout time.Duration
 	noDelay        bool
@@ -47,9 +43,6 @@ func (c *relayConnector) parseMetadata(md mdata.Metadata) (err error) {
 		MaxReceiveBuffer:  mdutil.GetInt(md, "mux.maxReceiveBuffer"),
 		MaxStreamBuffer:   mdutil.GetInt(md, "mux.maxStreamBuffer"),
 	}
-	if c.md.muxCfg.Version == 0 {
-		c.md.muxCfg.Version = defaultMuxVersion
-	}
 
 	return
 }