comments.module code different between 4.7.x and 5.0.

When I was using 4.7.x version I just implemented the following changes to comments.module to simply remove the ‘reply’ link from the user the comments.

Before:
$links[] = l(t('reply'), "comment/reply/$comment->nid/$comment->cid");

After:
// $links[] = l(t('reply'), "comment/reply/$comment->nid/$comment->cid");

But looking at the codes in 5.0, it’s different from the above, anyone know what I need to omit out exactly to remove the ‘reply’ button on user comments, on the code below? I don't want to break the drupal!

if (node_comment_mode($comment->nid) == COMMENT_NODE_READ_WRITE) {
    if (user_access('administer comments') && user_access('post comments')) {
      $links['comment_delete'] = array(
        'title' => t('delete'),
        'href' => "comment/delete/$comment->cid"
      );
      $links['comment_edit'] = array(
        'title' => t('edit'),
        'href' => "comment/edit/$comment->cid"
      );
      $links['comment_reply'] = array(
        'title' => t('reply'),
        'href' => "comment/reply/$comment->nid/$comment->cid"
      );
    }
    else if (user_access('post comments')) {
      if (comment_access('edit', $comment)) {
        $links['comment_edit'] = array(
          'title' => t('edit'),
          'href' => "comment/edit/$comment->cid"
        );
      }
      $links['comment_reply'] = array(
        'title' => t('reply'),
        'href' => "comment/reply/$comment->nid/$comment->cid"
      );
    }

Thanks!