remove stray print statement in datagram test (#3828)

integrationtests/self/datagram_test.go

@@ -119,10 +119,7 @@ var _ = Describe("Datagram test", func() {
 		var counter int
 		for {
 			// Close the connection if no message is received for 100 ms.
-			timer := time.AfterFunc(scaleDuration(100*time.Millisecond), func() {
-				fmt.Println("closing conn")
-				conn.CloseWithError(0, "")
-			})
+			timer := time.AfterFunc(scaleDuration(100*time.Millisecond), func() { conn.CloseWithError(0, "") })
 			if _, err := conn.ReceiveMessage(); err != nil {
 				break
 			}