message: Stop making settings.json backups
  ## Summary of the Pull Request
  This makes it so that the settings.json backups are no longer created when the user saves their settings via the Settings UI.
  Closes
diff: @@ -894,12 +894,6 @@ void CascadiaSettings::WriteSettingsToDisk() const
  {
  const auto settingsPath = _settingsPath();
  - {
  - // create a timestamped backup file
  - const auto backupSettingsPath = fmt::format(L"{}.{:%Y-%m-%dT%H-%M-%S}.backup", settingsPath.native(), fmt::localtime(std::time(nullptr)));
  - LOG_IF_WIN32_BOOL_FALSE(CopyFileW(settingsPath.c_str(), backupSettingsPath.c_str(), TRUE));
  - }
  -
  // write current settings to current settings file
  Json::StreamWriterBuilder wbuilder;
  wbuilder.settings_["indentation"] = " ";
  