[libata] Don't use old-EH ->eng_timeout() hook when not needed

The PATA driver set got converted to the new error handling setup, but
the old hooks were accidentally left in place.  Now, removed.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/pata_netcell.c b/drivers/ata/pata_netcell.c
index 16cb254..76eb9c9 100644
--- a/drivers/ata/pata_netcell.c
+++ b/drivers/ata/pata_netcell.c
@@ -90,8 +90,7 @@
 	.qc_issue		= ata_qc_issue_prot,
 	.data_xfer		= ata_pio_data_xfer,
 
-	/* Timeout handling. Special recovery hooks here */
-	.eng_timeout		= ata_eng_timeout,
+	/* IRQ-related hooks */
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,