perf(turn): reduce turn server count

This may reduce the time to connect, since on some browsers every address is tried before establishing a connection.

lib/util.ts

@@ -18,15 +18,7 @@ const DEFAULT_CONFIG = {
 		{
 			urls: [
 				"turn:eu-0.turn.peerjs.com:3478",
-				"turn:eu-1.turn.peerjs.com:3478",
-			],
-			username: "peerjs",
-			credential: "peerjsp",
-		},
-		{
-			urls: [
 				"turn:us-0.turn.peerjs.com:3478",
-				"turn:us-1.turn.peerjs.com:3478",
 			],
 			username: "peerjs",
 			credential: "peerjsp",