The attribute isn't used since commit 5c9736789b79ea49cd236ac326f0a414f63b1015
"i82378: Cleanup implementation".

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 hw/isa/i82378.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/hw/isa/i82378.c b/hw/isa/i82378.c
index 5432ab5065..63e0857208 100644
--- a/hw/isa/i82378.c
+++ b/hw/isa/i82378.c
@@ -34,7 +34,6 @@ struct I82378State {
 
     qemu_irq cpu_intr;
     qemu_irq *isa_irqs_in;
-    MemoryRegion io;
 };
 
 static const VMStateDescription vmstate_i82378 = {
-- 
2.40.1