USB: Remove unused is_iso from fsl_udc_core.c

is_iso variable is not used anywhere, remove it
Signed-off-by: NHuzaifa Sidhpurwala <huzaifas@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/gadget/fsl_udc_core.c

@@ -766,7 +766,6 @@ fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 	struct fsl_req *req = container_of(_req, struct fsl_req, req);
 	struct fsl_udc *udc;
 	unsigned long flags;
-	int is_iso = 0;
 
 	/* catch various bogus parameters */
 	if (!_req || !req->req.complete || !req->req.buf
@@ -781,7 +780,6 @@ fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 	if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
 		if (req->req.length > ep->ep.maxpacket)
 			return -EMSGSIZE;
-		is_iso = 1;
 	}
 
 	udc = ep->udc;