protocol/rtsp: removed Client field from client struct as not useful

protocol/rtsp/client.go

@@ -41,7 +41,6 @@ type Client struct {
 	urlStr string
 	url    *url.URL
 	conn   net.Conn
-	Client string
 }
 
 // NewClient returns a pointer to a new Client. The URL u will be parsed and
@@ -82,15 +81,13 @@ func (s *Client) Setup(track, transport string) (*Response, error) {
 		func(req *Request) {
 			req.Header.Add("Transport", transport)
 		},
-		func(resp *Response) {
-			s.Client = resp.Header.Get("Client")
-		},
+		nil,
 	)
 }
 
 // Play forms and sends an RTSP request of method PLAY to the RTSP server
 func (s *Client) Play() (*Response, error) {
-	return s.writeRequest(s.url, play, func(req *Request) { req.Header.Add("Client", s.Client) }, nil)
+	return s.writeRequest(s.url, play, nil, nil)
 }
 
 // writeRequest creates an RTSP request of the method given and writes it to the