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/CryCommon/Synchronization.h

@@ -6,9 +6,6 @@
  *
  */
 
-
-#ifndef CRYINCLUDE_CRYCOMMON_SYNCHRONIZATION_H
-#define CRYINCLUDE_CRYCOMMON_SYNCHRONIZATION_H
 #pragma once
 
 
@@ -25,46 +22,4 @@
 
 namespace stl
 {
-    template<class Sync>
-    struct AutoLock
-    {
-        ILINE AutoLock(Sync& sync)
-            : _sync(sync)
-        {
-            sync.Lock();
-        }
-        ILINE ~AutoLock()
-        {
-            _sync.Unlock();
-        }
-
-    private:
-        Sync& _sync;
-    };
-
-
-    struct PSyncNone
-    {
-        void Lock() {}
-        void Unlock() {}
-    };
-
-    struct PSyncMultiThread
-    {
-        PSyncMultiThread() {}
-
-        void Lock()
-        {
-            m_lock.lock();
-        }
-        void Unlock()
-        {
-            m_lock.unlock();
-        }
-
-    private:
-        AZStd::spin_mutex m_lock;
-    };
 };
-
-#endif // CRYINCLUDE_CRYCOMMON_SYNCHRONIZATION_H