igc: Remove unused field from igc_nfc_filter

The 'cookie' field is not used anywhere in the code so this patch
removes it from struct igc_nfc_filter.

Signed-off-by: Andre Guedes <[email protected]>
Tested-by: Aaron Brown <[email protected]>
Signed-off-by: Jeff Kirsher <[email protected]>

Author: Andre Guedes

drivers/net/ethernet/intel/igc/igc.h

@@ -470,7 +470,6 @@ struct igc_nfc_input {
 struct igc_nfc_filter {
 	struct hlist_node nfc_node;
 	struct igc_nfc_input filter;
-	unsigned long cookie;
 	u16 sw_idx;
 	u16 action;
 };