r8152: remove calling netif_napi_del

Remove unnecessary use of netif_napi_del. This also avoids to call
napi_disable() after netif_napi_del().

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/usb/r8152.c

@@ -5352,7 +5352,6 @@ static int rtl8152_probe(struct usb_interface *intf,
 	return 0;
 
 out1:
-	netif_napi_del(&tp->napi);
 	usb_set_intfdata(intf, NULL);
 out:
 	free_netdev(netdev);
@@ -5367,7 +5366,6 @@ static void rtl8152_disconnect(struct usb_interface *intf)
 	if (tp) {
 		rtl_set_unplug(tp);
 
-		netif_napi_del(&tp->napi);
 		unregister_netdev(tp->netdev);
 		cancel_delayed_work_sync(&tp->hw_phy_work);
 		tp->rtl_ops.unload(tp);