protocol/rtsp: removed sdp stuff

We won't be using this, at least not initially, so it's being deleted.

protocol/rtsp/sdp.go

@@ -1,73 +0,0 @@
-package rtsp
-
-import (
-	"bufio"
-	"errors"
-	"io"
-	"strconv"
-	"strings"
-)
-
-type SessionSection struct {
-	Version               int
-	Originator            string
-	SessionName           string
-	SessionInformation    string
-	URI                   string
-	Email                 string
-	Phone                 string
-	ConnectionInformation string
-	BandwidthInformation  string
-}
-
-func ParseSdp(r io.Reader) (SessionSection, error) {
-	var packet SessionSection
-	s := bufio.NewScanner(r)
-	for s.Scan() {
-		parts := strings.SplitN(s.Text(), "=", 2)
-		if len(parts) == 2 {
-			if len(parts[0]) != 1 {
-				return packet, errors.New("SDP only allows 1-character variables")
-			}
-
-			switch parts[0] {
-			// version
-			case "v":
-				ver, err := strconv.Atoi(parts[1])
-				if err != nil {
-					return packet, err
-				}
-				packet.Version = ver
-			// owner/creator and session identifier
-			case "o":
-				// o=<username> <session id> <version> <network type> <address type> <address>
-				// TODO: parse this
-				packet.Originator = parts[1]
-			// session name
-			case "s":
-				packet.SessionName = parts[1]
-			// session information
-			case "i":
-				packet.SessionInformation = parts[1]
-			// URI of description
-			case "u":
-				packet.URI = parts[1]
-			// email address
-			case "e":
-				packet.Email = parts[1]
-			// phone number
-			case "p":
-				packet.Phone = parts[1]
-			// connection information - not required if included in all media
-			case "c":
-				// TODO: parse this
-				packet.ConnectionInformation = parts[1]
-			// bandwidth information
-			case "b":
-				// TODO: parse this
-				packet.BandwidthInformation = parts[1]
-			}
-		}
-	}
-	return packet, nil
-}