ixgb: cleanup header

cleaned up some spacing in defines
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/net/ixgb/ixgb.h

@@ -96,8 +96,6 @@ struct ixgb_adapter;
 /* hardware cannot reliably support more than 512 descriptors owned by
  * hardware descriptor cache otherwise an unreliable ring under heavy
  * receive load may result */
-/* #define DEFAULT_RXD	   1024 */
-/* #define MAX_RXD	   4096 */
 #define DEFAULT_RXD      512
 #define MAX_RXD          512
 #define MIN_RXD           64