hw/core: Cleanup unused included header in machine-qmp-cmds.c

Remove unused header (qemu/main-loop.h) in machine-qmp-cmds.c.

Tested by "./configure" and then "make".

Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240311075621.3224684-3-zhao1.liu@linux.intel.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

hw/core/machine-qmp-cmds.c

@@ -19,7 +19,6 @@
 #include "qapi/qmp/qobject.h"
 #include "qapi/qobject-input-visitor.h"
 #include "qapi/type-helpers.h"
-#include "qemu/main-loop.h"
 #include "qemu/uuid.h"
 #include "qom/qom-qobject.h"
 #include "sysemu/hostmem.h"