include/hw/or-irq.h: Drop unused in_irqs field

The struct OrIRQState has an unused member field in_irqs.
This is a legacy of earlier versions of the patch; the
code that used it was dropped from the final version of
the code that went into master, but we forgot to delete
the no-longer-used struct field. Do so now.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: NAlistair Francis <alistair.francis@xilinx.com>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

include/hw/or-irq.h

@@ -38,7 +38,6 @@ struct OrIRQState {
     DeviceState parent_obj;
 
     qemu_irq out_irq;
-    qemu_irq *in_irqs;
     bool levels[MAX_OR_LINES];
     uint16_t num_lines;
 };