'cable_test_tdr_req_info' is unused since the original
commit 
f2bc8ad31a7f ("net: ethtool: Allow PHY cable test TDR data to
configured").
Remove it.
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
 }
 EXPORT_SYMBOL_GPL(ethnl_cable_test_fault_length);
 
-struct cable_test_tdr_req_info {
-       struct ethnl_req_info           base;
-};
-
 static const struct nla_policy cable_test_tdr_act_cfg_policy[] = {
        [ETHTOOL_A_CABLE_TEST_TDR_CFG_FIRST]    = { .type = NLA_U32 },
        [ETHTOOL_A_CABLE_TEST_TDR_CFG_LAST]     = { .type = NLA_U32 },