ongoing refactor of serialization and various cleanup

Game/Entity/EntityManager.h

@@ -1,6 +1,5 @@
 #pragma once
 
-#include <Core/Common/CoreTypes.h>
 #include <Core/Container/Vector.h>
 #include <Entity/Entity.h>
 
@@ -28,5 +27,4 @@ void             InitEntityManager(NonNullPtr<World> world);
 void             ShutdownEntityManager();
 EntityManager&   GetEntityManager();
 entity_template* RegisterEntity(EntityManager& manager, Entity* base, DerivedType entity);
-void             RegisterBaseEntity(EntityManager& manager, Entity&& base);
 void             UpdateEntityManager(EntityManager& manager);