usb: isp1760: remove redundant variable 'selector'

Variable 'selector'  is being assigned but is never used hence it is
redundant and can be removed.

Cleans up clang warning:
warning: variable 'selector' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/isp1760/isp1760-hcd.c

@@ -1817,7 +1817,6 @@ static int isp1760_hub_control(struct usb_hcd *hcd, u16 typeReq,
 	u32 temp, status;
 	unsigned long flags;
 	int retval = 0;
-	unsigned selector;
 
 	/*
 	 * FIXME:  support SetPortFeatures USB_PORT_FEAT_INDICATOR.
@@ -2010,7 +2009,6 @@ static int isp1760_hub_control(struct usb_hcd *hcd, u16 typeReq,
 		}
 		break;
 	case SetPortFeature:
-		selector = wIndex >> 8;
 		wIndex &= 0xff;
 		if (!wIndex || wIndex > ports)
 			goto error;