Remove obsolete werror sample

samples/CMakeLists.txt

@@ -22,7 +22,6 @@ set( SAMPLES
      stringto-test.cpp
      taglist.cpp
      tiff-test.cpp
-     werror-test.cpp
      write-test.cpp
      write2-test.cpp
      xmpparse.cpp

samples/werror-test.cpp

@@ -1,23 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-// Simple tests for the wide-string error class WError
-
-#include <exiv2/exiv2.hpp>
-#include <iostream>
-
-int main()
-{
-    Exiv2::XmpParser::initialize();
-    ::atexit(Exiv2::XmpParser::terminate);
-#ifdef EXV_ENABLE_BMFF
-    Exiv2::enableBMFF();
-#endif
-
-    try {
-        throw Exiv2::Error(Exiv2::ErrorCode::kerGeneralError, "ARG1", "ARG2", "ARG3");
-    }
-    catch (const Exiv2::Error& e) {
-        std::cout << "Caught Error '" << e.what() << "'\n";
-    }
-
-    return 0;
-}