Remove an unused #include of <sys/_properties.h>.

#include <cutils/iosched_policy.h>

#include <cutils/list.h>

#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_

#include <sys/_system_properties.h>

static list_declare(service_list);

static list_declare(action_list);

static list_declare(action_queue);