scsi: libsas: docs: Remove notify_ha_event()

The ->notify_ha_event() hook has long been removed from the libsas event
interface.

Remove it from documentation.

Link: https://lore.kernel.org/r/[email protected]
Fixes: 042ebd2 ("scsi: libsas: kill useless ha_event and do some cleanup")
Cc: [email protected]
Reviewed-by: John Garry <[email protected]>
Reviewed-by: Jack Wang <[email protected]>
Signed-off-by: Ahmed S. Darwish <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

Documentation/scsi/libsas.rst

@@ -189,7 +189,6 @@ num_phys
 The event interface::
 
 	/* LLDD calls these to notify the class of an event. */
-	void (*notify_ha_event)(struct sas_ha_struct *, enum ha_event);
 	void (*notify_port_event)(struct sas_phy *, enum port_event);
 	void (*notify_phy_event)(struct sas_phy *, enum phy_event);