client: remove useless code

client.go

@@ -709,9 +709,7 @@ func (c *Client) playRecordStart() {
 			v := time.Now().Unix()
 			c.tcpLastFrameTime = &v
 		}
-	} else {
-		switch *c.effectiveTransport {
-		case TransportUDP:
+	} else if *c.effectiveTransport == TransportUDP {
 		for trackID, cct := range c.tracks {
 			ctrackID := trackID
 
@@ -725,22 +723,6 @@ func (c *Client) playRecordStart() {
 			cct.udpRTPListener.start(true)
 			cct.udpRTCPListener.start(true)
 		}
-
-		case TransportUDPMulticast:
-			for trackID, cct := range c.tracks {
-				ctrackID := trackID
-
-				cct.rtcpSender = rtcpsender.New(c.udpSenderReportPeriod,
-					cct.track.ClockRate(), func(pkt rtcp.Packet) {
-						c.WritePacketRTCP(ctrackID, pkt)
-					})
-			}
-
-			for _, cct := range c.tracks {
-				cct.udpRTPListener.start(true)
-				cct.udpRTCPListener.start(true)
-			}
-		}
 	}
 
 	// for some reason, SetReadDeadline() must always be called in the same