Remove html_entities for PHP 5

Taking these changes removing the html_entities.php file. And found this is not called anywhere in entire codebase so it is good to be merged.

I checked how it was used in the D7 version and there the reference to html_entities.php was in FeedsExXmlUtility::decodeNamedHtmlEntities():

/**
 * Converts named HTML entities to their UTF-8 equivalent.
 *
 * @param string $markup
 *   The string.
 *
 * @return string
 *   The converted string.
 */
public static function decodeNamedHtmlEntities($markup) {
  if (version_compare(PHP_VERSION, '5.4.0', '<')) {
    $map = require dirname(dirname(dirname(__FILE__))) . '/resources/html_entities.php';
  }
  else {
    $map = array_flip(get_html_translation_table(HTML_ENTITIES, ENT_NOQUOTES | ENT_HTML5, 'UTF-8'));
    unset($map['&amp;'], $map['&lt;'], $map['&gt;']);
  }

  return strtr($markup, $map);
}

But that line is gone in the equivalent of the code (\Drupal\feeds_ex\Utility\XmlUtility::decodeNamedHtmlEntities(). So yes, the file can be safely removed.

Merged!

Automatically closed - issue fixed for 2 weeks with no activity.