def _remove_html_comment_tags(html):
    """
    Returns the passed HTML contents with all comment tags removed while
    keeping the contents within the tags.

    Some pages embed the HTML contents in comments. Since the HTML contents are
    valid, removing the content tags (but not the actual code within the
    comments) will return the desired contents.

    Parameters
    ----------
    html : PyQuery object
        A PyQuery object which contains the requested HTML page contents.

    Returns
    -------
    string
        The passed HTML contents with all comment tags removed.
    """
    return str(html).replace('<!--', '').replace('-->', '')