staging: ks7010: ks_wlan_net: Remove unnecessary variable used to store return value

Remove unneeded code in order to make clear
that the function returns 0(success) in all cases.

Done using returnvar.cocci script.
Signed-off-by: NGeorgiana Rodica Chelu <georgiana.chelu93@gmail.com>
Acked-by: NJulia Lawall <julia.lawall@lip6.fr>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/ks7010/ks_wlan_net.c

@@ -3507,12 +3507,11 @@ int ks_wlan_net_stop(struct net_device *dev)
 {
 	struct ks_wlan_private *priv = netdev_priv(dev);
 
-	int ret = 0;
 	priv->device_open_status = 0;
 	del_timer_sync(&update_phyinfo_timer);
 
 	if (netif_running(dev))
 		netif_stop_queue(dev);
 
-	return ret;
+	return 0;
 }