scsi: virtio_scsi: remove unused 'affinity_hint_set'

The 'affinity_hint_set' is not used any longer since commit
0d9f0a52 ("virtio_scsi: use virtio IRQ affinity").
Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/virtio_scsi.c

@@ -77,9 +77,6 @@ struct virtio_scsi {
 
 	u32 num_queues;
 
-	/* If the affinity hint is set for virtqueues */
-	bool affinity_hint_set;
-
 	struct hlist_node node;
 
 	/* Protected by event_vq lock */