Removing noise from the build. Windows CE always uses the W stubs for now. r=me

xpcom/io/nsWinAPIs.cpp

@@ -279,8 +279,10 @@ BOOL WINAPI nsGetFileAttributesExW(LPCWSTR aPath, GET_FILEEX_INFO_LEVELS aLevel,
                                    LPVOID aInfo)
 {
     NS_ASSERTION(aLevel == GetFileExInfoStandard, "invalid level specified");
+#ifndef WINCE
     NS_ASSERTION(nsWinAPIs::mCopyFile != CopyFileW, 
                  "Win APIs pointers are reset to the stubs of 'W' APIs");
+#endif
 
     nsCAutoString path;
     const char *pPath;