oops -- remove some unused code

grpcurl.go

@@ -854,9 +854,6 @@ func BlockingDial(ctx context.Context, address string, creds credentials.Transpo
 	// grpc.Dial doesn't provide any information on permanent connection errors (like
 	// TLS handshake failures). So in order to provide good error messages, we need a
 	// custom dialer that can provide that info. That means we manage the TLS handshake.
-	var wg sync.WaitGroup
-	wg.Add(1)
-	var once sync.Once
 	result := make(chan interface{}, 1)
 
 	writeResult := func(res interface{}) {
@@ -868,7 +865,6 @@ func BlockingDial(ctx context.Context, address string, creds credentials.Transpo
 	}
 
 	dialer := func(address string, timeout time.Duration) (net.Conn, error) {
-		once.Do(func() { wg.Done() })
 		ctx, cancel := context.WithTimeout(ctx, timeout)
 		defer cancel()
 		conn, err := (&net.Dialer{Cancel: ctx.Done()}).Dial("tcp", address)