No need for this #pragma once

Change-Id: I219226060ebf4b8b86c8f0487fc679f22f73812a
Reviewed-on: https://gerrit.libreoffice.org/54468Reviewed-by: Tor Lillqvist <tml@collabora.com>
Tested-by: Tor Lillqvist <tml@collabora.com>

extensions/source/ole/ole2uno.hxx

@@ -20,11 +20,6 @@
 #ifndef INCLUDED_EXTENSIONS_SOURCE_OLE_OLE2UNO_HXX
 #define INCLUDED_EXTENSIONS_SOURCE_OLE_OLE2UNO_HXX
 
-
-#ifdef _MSC_VER
-#pragma once
-#endif
-
 #include "wincrap.hxx"
 
 #include <com/sun/star/lang/XMultiServiceFactory.hpp>