net: au1000_eth: remove unused global variable.

The driver global au_macs[] is unused in the entire kernel tree,
so remove it.

Signed-off-by: Manuel Lauss <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/au1000_eth.c

···
  * complete immediately.
  */
 
-struct au1000_private *au_macs[NUM_ETH_INTERFACES];
-
 /*
  * board-specific configurations
  *