The private SvFileStream::GetFileHandle() was used only on UNX

Drop the Windows implementation which wasn't x64-clean anyway.

Change-Id: I1622196dc4c3b940cc8d629016985cf97480a059

tools/inc/tools/stream.hxx

@@ -659,8 +659,9 @@ private:
     String          aFilename;
     sal_uInt16      nLockCounter;
     sal_Bool        bIsOpen;
+#ifdef UNX
     sal_uInt32      GetFileHandle() const;
-
+#endif
     // Forbidden and not implemented.
     SvFileStream (const SvFileStream&);
     SvFileStream & operator= (const SvFileStream&);

tools/source/stream/strmwnt.cxx

@@ -133,11 +133,6 @@ SvFileStream::~SvFileStream()
         delete pInstanceData;
 }
 
-sal_uIntPtr SvFileStream::GetFileHandle() const
-{
-    return (sal_uIntPtr)pInstanceData->hFile;
-}
-
 sal_uInt16 SvFileStream::IsA() const
 {
     return ID_FILESTREAM;