message: Remove fs::exists() call
diff: @@ -166,9 +166,7 @@ namespace vcpkg::Commands::Integrate
  fs::create_directory(tmp_dir);
  bool should_install_system = true;
  - if (fs::exists(system_wide_targets_file))
  - {
  - auto system_wide_file_contents = Files::read_contents(system_wide_targets_file);
  + const expected<std::string> system_wide_file_contents = Files::read_contents(system_wide_targets_file);
  if (auto contents_data = system_wide_file_contents.get())
  {
  std::regex re(R"###(<!-- version (\d+) -->)###");
  @@ -181,7 +179,6 @@ namespace vcpkg::Commands::Integrate
  should_install_system = false;
  }
  }
  - }
  if (should_install_system)
  {
  