net: remove unnecessary genlmsg_cancel() calls

the message be freed immediately, no need to trim it
back to the previous size.

Inspired by commit 7a9b3ec1e1 ("nl80211: remove unnecessary genlmsg_cancel() calls")

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/wireless/mac80211_hwsim.c

@@ -2514,7 +2514,6 @@ static void hwsim_mcast_new_radio(int id, struct genl_info *info,
 	return;
 
 out_err:
-	genlmsg_cancel(mcast_skb, data);
 	nlmsg_free(mcast_skb);
 }