hw/i386/ioapic_internal: Remove unused "hw/i386/ioapic.h" header

The "ioapic_internal.h" does not use anything from
"hw/i386/ioapic.h", remove it.

Acked-by: John Snow <jsnow@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200228114649.12818-4-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

include/hw/i386/ioapic_internal.h

@@ -23,7 +23,6 @@
 #define QEMU_IOAPIC_INTERNAL_H
 
 #include "exec/memory.h"
-#include "hw/i386/ioapic.h"
 #include "hw/sysbus.h"
 #include "qemu/notify.h"