Legacy code cleanup - part 3 (#3903)

* Legacy cleanup - part 3

Not much is left that can be easily removed,
so I think this will be last cleanup before the legacy functionality is replaced.

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

* fix windows build, remove a few more things, re-add one file

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

* Remove legacy RenderBus + more cleanups

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

* Remove MaterialOwnerBus.h

Clean-up in Cry_Matrix34/33

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

Code/Legacy/CrySystem/System.cpp

@@ -125,7 +125,6 @@ LRESULT WINAPI WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 #include "Log.h"
 
 #include "XML/xml.h"
-#include "XML/ReadWriteXMLSink.h"
 
 #include "LocalizedStringManager.h"
 #include "XML/XmlUtils.h"
@@ -340,9 +339,6 @@ CSystem::~CSystem()
 //////////////////////////////////////////////////////////////////////////
 void CSystem::Release()
 {
-    //Disconnect the render bus
-    AZ::RenderNotificationsBus::Handler::BusDisconnect();
-
     delete this;
 }