[svn-r14836] Purpose: Remove English-specific code from Windows test scripts

Description:
In previous versions of Windows, the builtin 'FC' command (diff equivalent) didn't return proper exit status.  As a work-around, we parsed the message returned to check status.  This relies on English return messages.

In current Windows XP and Windows Vista, FC will return exit status as expected, so we can remove this workaround.  Older platforms where we would need this workaround are no longer supported.

Tested:
VS2005 on Windows XP
Small test on Windows Vista

windows/tools/h5diff/testh5diff.bat

@@ -141,7 +141,7 @@ rem
         call :testing CREATED %h5diff% %params%
         copy /y %actual% %expect% > nul
     ) else (
-        fc /w %expect% %actual% | find "FC: no diff" > nul
+        fc /w %expect% %actual% > nul
         if !errorlevel! equ 0 (
             call :testing PASSED %h5diff% %params%
         ) else (