--- libmalloc/libmalloc-521.120.7/tests/xzone_testing.h
+++ /dev/null
@@ -1,31 +0,0 @@
-#ifndef __XZONE_TESTING_H__
-#define __XZONE_TESTING_H__
-
-#include <darwintest.h>
-
-#include <../src/internal.h>
-
-#if CONFIG_XZONE_MALLOC
-
-extern malloc_zone_t **malloc_zones;
-
-static inline void
-assert_zone_is_xzone_malloc(malloc_zone_t *zone)
-{
-	T_ASSERT_GE(zone->version, 14, "zone version");
-	T_ASSERT_EQ(zone->introspect->zone_type, MALLOC_ZONE_TYPE_XZONE,
-			"zone is xzone malloc");
-}
-
-static inline xzm_malloc_zone_t
-get_default_xzone_zone(void)
-{
-	malloc_zone_t *dz = malloc_zones[0];
-	assert_zone_is_xzone_malloc(dz);
-
-	return (xzm_malloc_zone_t)dz;
-}
-
-#endif // CONFIG_XZONE_MALLOC
-
-#endif // __XZONE_TESTING_H__