[PATCH -next] USB: serial: quatech2: remove set but not used variable 'port_priv'

[YueHaibing]

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/usb/serial/quatech2.c: In function 'qt2_process_read_urb':
drivers/usb/serial/quatech2.c:503:27: warning:
 variable 'port_priv' set but not used [-Wunused-but-set-variable]

It not used any more after
commit 2be818a116b2 ("Revert "USB: quatech2: only write to the tty if the port 
is open."")

Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 drivers/usb/serial/quatech2.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/usb/serial/quatech2.c b/drivers/usb/serial/quatech2.c
index f2fbe1e..a62981c 100644
--- a/drivers/usb/serial/quatech2.c
+++ b/drivers/usb/serial/quatech2.c
@@ -500,7 +500,6 @@ static void qt2_process_read_urb(struct urb *urb)
        struct usb_serial *serial;
        struct qt2_serial_private *serial_priv;
        struct usb_serial_port *port;
-       struct qt2_port_private *port_priv;
        bool escapeflag;
        unsigned char *ch;
        int i;
@@ -514,7 +513,6 @@ static void qt2_process_read_urb(struct urb *urb)
        serial = urb->context;
        serial_priv = usb_get_serial_data(serial);
        port = serial->port[serial_priv->current_port];
-       port_priv = usb_get_serial_port_data(port);
 
        for (i = 0; i < urb->actual_length; i++) {
                ch = (unsigned char *)urb->transfer_buffer + i;
@@ -566,7 +564,6 @@ static void qt2_process_read_urb(struct urb *urb)
 
                                serial_priv->current_port = newport;
                                port = serial->port[serial_priv->current_port];
-                               port_priv = usb_get_serial_port_data(port);
                                i += 3;
                                escapeflag = true;
                                break;