igb: removed unused tx/rx total bytes/packets from adapter struct

This patch removes unused variables total_tx_bytes, total_tx_packets,
total_rx_bytes, and total_rx_packets from the adapter struct.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/igb/igb.h

@@ -249,10 +249,6 @@ struct igb_adapter {
 	u16 link_speed;
 	u16 link_duplex;
 
-	unsigned int total_tx_bytes;
-	unsigned int total_tx_packets;
-	unsigned int total_rx_bytes;
-	unsigned int total_rx_packets;
 	/* Interrupt Throttle Rate */
 	u32 rx_itr_setting;
 	u32 tx_itr_setting;