Legacy cleanup, part 2 (#3659)

* Legacy cleanup, part 2

There are still things that can be removed, those will be likely done in part three:
`The Return of the Cleanup` :)

Signed-off-by: nemerle <96597+nemerle@users.noreply.github.com>

* Fix windows build

Somehow there were some unfixed errors from enabled warnings?
I'm unsure if I've pulled repo in unstable state, or those were somehow
missed.

Signed-off-by: nemerle <96597+nemerle@users.noreply.github.com>

Code/Legacy/CrySystem/ViewSystem/View.h

@@ -15,6 +15,7 @@
 #include <Cry_Camera.h>
 
 class CGameObject;
+struct ISystem;
 
 namespace LegacyViewSystem
 {
@@ -106,7 +107,6 @@ public:
     virtual void SetActive(const bool bActive);
     // ~IView
 
-    void Serialize(TSerialize ser) override;
     void PostSerialize() override;
     CCamera& GetCamera() override { return m_camera; }
     const CCamera& GetCamera() const override { return m_camera; }