Remove OS(IOS) and OS(MAC_OS_X) guards.

Source/wtf/FastMalloc.cpp

Index: Source/wtf/FastMalloc.cpp
diff --git a/Source/wtf/FastMalloc.cpp b/Source/wtf/FastMalloc.cpp
index bc10f958051845c04f78482b98f861c62786c28b..2f8051136bc7d842b06e5910b8a2da84a22ea015 100644
--- a/Source/wtf/FastMalloc.cpp
+++ b/Source/wtf/FastMalloc.cpp
@@ -4166,10 +4166,10 @@ extern "C" {
 malloc_introspection_t jscore_fastmalloc_introspection = { &FastMallocZone::enumerate, &FastMallocZone::goodSize, &FastMallocZone::check, &FastMallocZone::print,
     &FastMallocZone::log, &FastMallocZone::forceLock, &FastMallocZone::forceUnlock, &FastMallocZone::statistics
 
-#if OS(IOS) || __MAC_OS_X_VERSION_MAX_ALLOWED >= 1060
+#if __MAC_OS_X_VERSION_MAX_ALLOWED >= 1060
     , 0 // zone_locked will not be called on the zone unless it advertises itself as version five or higher.
 #endif
-#if OS(IOS) || __MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
+#if __MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
     , 0, 0, 0, 0 // These members will not be used unless the zone advertises itself as version seven or higher.
 #endif