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 <[e-mail]>
Signed-off-by: YueHaibing <[e-mail]>
Reviewed-by: Michal Kubecek <[e-mail]>
Reviewed-by: Simon Horman <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/ethtool/linkmodes.c

···
 {
 	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;
···
 			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)