Red code legacy MemoryManager, StreamEngine, ResourceManager, ImageHandler, AsyncPakManager, and more (#758)

Remove from CryCommon and CrySystem:
- MemoryManager and all related classes/files
- StreamEngine, ResourceManager, ImageHandler, and AsyncPakManager
- Various other related interfaces/files/classes etc. that are all now unused

Code/CryEngine/CryCommon/platform_impl.cpp

@@ -20,6 +20,7 @@
 
 #include <AzCore/Debug/Profiler.h>
 #include <AzCore/Debug/ProfileModuleInit.h>
+#include <AzCore/Memory/AllocatorManager.h>
 #include <AzCore/Module/Environment.h>
 
 // Section dictionary
@@ -194,11 +195,6 @@ void __stl_debug_message(const char* format_str, ...)
 #include <intrin.h>
 #endif
 
-// If we use cry memory manager this should be also included in every module.
-#if defined(USING_CRY_MEMORY_MANAGER)
-#include <CryMemoryManager_impl.h>
-#endif
-
 #if defined(APPLE) || defined(LINUX)
 #include "CryAssert_impl.h"
 #endif