[PATCH] brcmfmac: remove set but not used variable 'old_state'

[YueHaibing]

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

drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c: In function 
'brcmf_usb_state_change':
drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c:578:6: warning:
 variable 'old_state' set but not used [-Wunused-but-set-variable]

It's never used and can be removed.

Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c 
b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
index 76cfaf6999c8..398536b30b7a 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
@@ -575,7 +575,6 @@ static void
 brcmf_usb_state_change(struct brcmf_usbdev_info *devinfo, int state)
 {
        struct brcmf_bus *bcmf_bus = devinfo->bus_pub.bus;
-       int old_state;
 
        brcmf_dbg(USB, "Enter, current state=%d, new state=%d\n",
                  devinfo->bus_pub.state, state);
@@ -583,7 +582,6 @@ brcmf_usb_state_change(struct brcmf_usbdev_info *devinfo, 
int state)
        if (devinfo->bus_pub.state == state)
                return;
 
-       old_state = devinfo->bus_pub.state;
        devinfo->bus_pub.state = state;
 
        /* update state of upper layer */