ethtool: fec: remove long structure description

Digging through the mailing list archive @autoneg was part
of the first version of the RFC, this left over comment was
pointed out twice in review but wasn't removed.

The sentence is an exact copy-paste from pauseparam.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: hongrongxuan <hongrongxuan@huawei.com>

include/uapi/linux/ethtool.h

@@ -1379,10 +1379,6 @@ struct ethtool_per_queue_op {
  * @active_fec: FEC mode which is active on the port
  * @fec: Bitmask of supported/configured FEC modes
  * @rsvd: Reserved for future extensions. i.e FEC bypass feature.
- *
- * Drivers should reject a non-zero setting of @autoneg when
- * autoneogotiation is disabled (or not supported) for the link.
- *
  */
 struct ethtool_fecparam {
 	__u32   cmd;