Kill off now-redundant _irq() methods.

src/drivers/net/pnic.c

 	return 0;
 }
 
-/**************************************************************************
-IRQ - Handle card interrupt status
-***************************************************************************/
-#if 0
-static void pnic_irq ( struct net_device *netdev, irq_action_t action ) {
-	struct pnic *pnic = netdev->priv;
-	uint8_t enabled;
-
-	switch ( action ) {
-	case DISABLE :
-	case ENABLE :
-		enabled = ( action == ENABLE ? 1 : 0 );
-		pnic_command ( pnic, PNIC_CMD_MASK_IRQ,
-			       &enabled, sizeof ( enabled ), NULL, 0, NULL );
-		break;
-	case FORCE :
-		pnic_command ( pnic, PNIC_CMD_FORCE_IRQ,
-			       NULL, 0, NULL, 0, NULL );
-		break;
-	}
-}
-#endif
-
 /**************************************************************************
 OPEN - Open network device
 ***************************************************************************/

src/drivers/net/rtl8139.c

 	}
 }
 
-#if 0
-static void rtl_irq(struct nic *nic, irq_action_t action)
-{
-	unsigned int mask;
-	/* Bit of a guess as to which interrupts we should allow */
-	unsigned int interested = ROK | RER | RXOVW | FOVW | SERR;
-
-	switch ( action ) {
-	case DISABLE :
-	case ENABLE :
-		mask = inw(rtl->ioaddr + IntrMask);
-		mask = mask & ~interested;
-		if ( action == ENABLE ) mask = mask | interested;
-		outw(mask, rtl->ioaddr + IntrMask);
-		break;
-	case FORCE :
-		/* Apparently writing a 1 to this read-only bit of a
-		 * read-only and otherwise unrelated register will
-		 * force an interrupt.  If you ever want to see how
-		 * not to write a datasheet, read the one for the
-		 * RTL8139...
-		 */
-		outb(EROK, rtl->ioaddr + RxEarlyStatus);
-		break;
-	}
-}
-#endif
-
 /**
  * Probe PCI device
  *