Revert sfu-ws changes

RID/MID has been disabled in pion/webrtc@v3 so we no longer have an
issues signaling.

sfu-ws/main.go

@@ -229,26 +229,8 @@ func websocketHandler(w http.ResponseWriter, r *http.Request) {
 	// When this frame returns close the Websocket
 	defer c.Close() //nolint
 
-	// Create a MediaEngine object to configure the supported codec
-	m := &webrtc.MediaEngine{}
-
-	// Setup the codecs you want to use.
-	// We'll use a VP8 and Opus but you can also define your own
-	if err = m.RegisterCodec(webrtc.RTPCodecParameters{
-		RTPCodecCapability: webrtc.RTPCodecCapability{MimeType: webrtc.MimeTypeVP8, ClockRate: 90000, Channels: 0, SDPFmtpLine: "", RTCPFeedback: nil},
-		PayloadType:        96,
-	}, webrtc.RTPCodecTypeVideo); err != nil {
-		panic(err)
-	}
-	if err = m.RegisterCodec(webrtc.RTPCodecParameters{
-		RTPCodecCapability: webrtc.RTPCodecCapability{MimeType: webrtc.MimeTypeOpus, ClockRate: 48000, Channels: 2, SDPFmtpLine: "minptime=10; useinbandfec=1", RTCPFeedback: nil},
-		PayloadType:        111,
-	}, webrtc.RTPCodecTypeAudio); err != nil {
-		panic(err)
-	}
-
 	// Create new PeerConnection
-	peerConnection, err := webrtc.NewAPI(webrtc.WithMediaEngine(m)).NewPeerConnection(webrtc.Configuration{})
+	peerConnection, err := webrtc.NewPeerConnection(webrtc.Configuration{})
 	if err != nil {
 		log.Print(err)
 		return