--- libmalloc/libmalloc-374.100.5/src/platform.h
+++ libmalloc/libmalloc-317.121.1/src/platform.h
@@ -70,15 +70,6 @@
 // enable nano checking for corrupt free list
 #define NANO_FREE_DEQUEUE_DILIGENCE 1
 
-// Conditional behaviour depends on MallocSpaceEfficient being set by
-// JetsamProperties which isn't true on iOS
-#if MALLOC_TARGET_IOS || TARGET_OS_DRIVERKIT
-#define NANOV2_DEFAULT_MODE NANO_ENABLED
-#else
-#define NANOV2_DEFAULT_MODE NANO_CONDITIONAL
-#endif
-
-
 // This governs a last-free cache of 1 that bypasses the free-list for each region size
 #define CONFIG_TINY_CACHE 1
 #define CONFIG_SMALL_CACHE 1
@@ -128,13 +119,6 @@
 #define CONFIG_FEATUREFLAGS_SIMPLE 0
 #endif
 
-// Quarantine zone, only useful on macOS (+ DriverKit, 64-bit simulators).
-#if (TARGET_OS_OSX || TARGET_OS_DRIVERKIT || TARGET_OS_SIMULATOR) && MALLOC_TARGET_64BIT
-#define CONFIG_QUARANTINE 1
-#else
-#define CONFIG_QUARANTINE 0
-#endif
-
 // presence of commpage memsize
 #define CONFIG_HAS_COMMPAGE_MEMSIZE 1
 
@@ -146,11 +130,4 @@
 #define CONFIG_TINY_USES_HYPER_SHIFT 0
 #define CONFIG_SMALL_USES_HYPER_SHIFT 0
 
-// FIXME: limit number of malloc_create_zone() wrapper zones for watchOS to remove this
-#if TARGET_OS_OSX || TARGET_OS_IOS
-#define CONFIG_PGM_WRAP_CUSTOM_ZONES 1
-#else
-#define CONFIG_PGM_WRAP_CUSTOM_ZONES 0
-#endif
-
 #endif // __PLATFORM_H