include: MSVC: pragma warning: make more specific, remove obsolete

Change-Id: Iba5ffe646e5a6cf8ecfb635c21546025fc5606db
Reviewed-on: https://gerrit.libreoffice.org/48995Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

include/prewin.h

@@ -34,32 +34,16 @@
 #if !defined STRICT
 #   define STRICT
 #endif
-#ifdef _MSC_VER
-#   pragma warning(push, 1)
-#   pragma warning (disable: 4005)
-#endif
 
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 
-#ifdef _MSC_VER
-#   pragma warning(pop)
-#endif
-
 #include <shellapi.h>
 #include <commdlg.h>
 #include <dlgs.h>
 
-#ifdef _MSC_VER
-#   pragma warning(push, 1)
-#endif
-
 #include <commctrl.h>
 
-#ifdef _MSC_VER
-#   pragma warning(pop)
-#endif
-
 #endif
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */