ethtool: remove set but not used variable 'lsettings'

Fixes gcc '-Wunused-but-set-variable' warning:

net/ethtool/linkmodes.c: In function 'ethnl_set_linkmodes':
net/ethtool/linkmodes.c:326:32: warning:
 variable 'lsettings' set but not used [-Wunused-but-set-variable]
  struct ethtool_link_settings *lsettings;
                                ^
It is never used, so remove it.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Michal Kubecek <mkubecek@suse.cz>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ethtool/linkmodes.c

@@ -323,7 +323,6 @@ int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info)
 {
 	struct nlattr *tb[ETHTOOL_A_LINKMODES_MAX + 1];
 	struct ethtool_link_ksettings ksettings = {};
-	struct ethtool_link_settings *lsettings;
 	struct ethnl_req_info req_info = {};
 	struct net_device *dev;
 	bool mod = false;
@@ -354,7 +353,6 @@ int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info)
 			GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
 		goto out_ops;
 	}
-	lsettings = &ksettings.base;
 
 	ret = ethnl_update_linkmodes(info, tb, &ksettings, &mod);
 	if (ret < 0)