remove duplicated code

pkg/rtsp/server.go

@@ -139,16 +139,6 @@ func (c *Conn) Accept() error {
 				medias = append(medias, media)
 			}
 
-			for i, track := range c.Receivers {
-				media := &core.Media{
-					Kind:      core.GetKind(track.Codec.Name),
-					Direction: core.DirectionSendonly,
-					Codecs:    []*core.Codec{track.Codec},
-					ID:        "trackID=" + strconv.Itoa(i+len(c.Senders)),
-				}
-				medias = append(medias, media)
-			}
-
 			res.Body, err = core.MarshalSDP(c.SessionName, medias)
 			if err != nil {
 				return err