how to remove w3 validation Bad value revision for attribute rel on element link in drupal 8

Demo.module

/**

 * Implements hook_entity_view_alter().

 * @param array $build

 * @param EntityInterface $entity

 * @param EntityViewDisplayInterface $display

 */

function Demo_entity_view_alter(array &$build, EntityInterface $entity, EntityViewDisplayInterface $display) {

  // Cheking view_mode for node.

  if ($build['#view_mode'] !== 'full' && $entity Instanceof NodeInterface) {

    return;

  }

  _remove_header_links($build);

}

function _remove_header_links(array &$attachments) {

  // Cheking html_head_link on attached tags in head.

  if (!isset($attachments['#attached']['html_head_link'])) {

    return;

  }

  // Array to unset.

  $unset_html_head_link = [

    'delete-form',

    'edit-form',

    'version-history',

    'revision',

    'display',

    'drupal:content-translation-overview',

    'drupal:content-translation-add',

    'drupal:content-translation-edit',

    'drupal:content-translation-delete',

    'shortlink',

    'canonical'

  ];

  // Unset loop.

  foreach ($attachments['#attached']['html_head_link'] as $key => $value) {

    if (isset($value[0]['rel']) && in_array($value[0]['rel'], $unset_html_head_link)) {

      unset($attachments['#attached']['html_head_link'][$key]);

    }

  }

}