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/SystemInit.cpp

@@ -1598,9 +1598,6 @@ AZ_POP_DISABLE_WARNING
         LoadConfiguration("client.cfg", &CVarsClientConfigSink);
     }
 
-    //Connect to the render bus
-    AZ::RenderNotificationsBus::Handler::BusConnect();
-
     // Send out EBus event
     EBUS_EVENT(CrySystemEventBus, OnCrySystemInitialized, *this, startupParams);