remove obsolete send-stun command

Signed-off-by: Steffen Vogel <post@steffenvogel.de>

test/send-stun/main.go

@@ -1,31 +0,0 @@
-package main
-
-import (
-	"fmt"
-
-	"github.com/pion/stun"
-)
-
-func main() {
-	// Creating a "connection" to STUN server.
-	c, err := stun.Dial("udp", "127.0.0.1:12345")
-	if err != nil {
-		panic(err)
-	}
-	// Building binding request with random transaction id.
-	message := stun.MustBuild(stun.TransactionID, stun.BindingRequest)
-	// Sending request to STUN server, waiting for response message.
-	if err := c.Do(message, func(res stun.Event) {
-		if res.Error != nil {
-			panic(res.Error)
-		}
-		// Decoding XOR-MAPPED-ADDRESS attribute from message.
-		var xorAddr stun.XORMappedAddress
-		if err := xorAddr.GetFrom(res.Message); err != nil {
-			panic(err)
-		}
-		fmt.Println("your IP is", xorAddr.IP)
-	}); err != nil {
-		panic(err)
-	}
-}