xen-netfront: remove redundant assignment to variable 'act'

The variable act is being initialized with a value that is
never read and it is being updated later with a new value. The
initialization is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/xen-netfront.c

@@ -856,7 +856,7 @@ static u32 xennet_run_xdp(struct netfront_queue *queue, struct page *pdata,
 {
 	struct xdp_frame *xdpf;
 	u32 len = rx->status;
-	u32 act = XDP_PASS;
+	u32 act;
 	int err;
 
 	xdp->data_hard_start = page_address(pdata);