Enable ManagedObjectWrapper on react-native-macOS (#35146)

Summary:
Pull Request resolved: #35146

This class is used by Fabric - but does not compile on macOS yet.

Changelog:
[iOS][Fixed] Make ManagedObjectWrapper compile on macOS

Reviewed By: javache

Differential Revision: D40839241

fbshipit-source-id: 73b93a9963db89af19529fbfd60a64f4e5aaf036

Author: christophpurrer

ReactCommon/react/utils/ManagedObjectWrapper.h

@@ -14,7 +14,7 @@
 #endif
 
 #if defined(__OBJC__) && defined(__cplusplus)
-#if TARGET_OS_MAC && TARGET_OS_IPHONE
+#if TARGET_OS_MAC
 
 #include <memory>
 

ReactCommon/react/utils/ManagedObjectWrapper.mm

@@ -7,8 +7,7 @@
 
 #include "ManagedObjectWrapper.h"
 
-#if defined(__OBJC__) && defined(__cplusplus)
-#if TARGET_OS_MAC && TARGET_OS_IPHONE
+#if TARGET_OS_MAC
 
 namespace facebook {
 namespace react {
@@ -35,4 +34,3 @@ @implementation RCTInternalGenericWeakWrapper
 @end
 
 #endif
-#endif