Removes an error message shown by Limit Login Attempts WordPress plugin. NN attemmpts remaining. We don't need to give info to the attacker. Making error null solves half of the problem. There is a wrapper with a red border which we will remove with : login_error_message_hide_empty_error_container

gistfile1.php

add_filter('login_head', create_function('$a', "wp_enqueue_script('jquery');"));
add_filter('login_errors', 'login_error_message');
add_action('login_footer', 'login_error_message_hide_empty_error_container');

/**
 * Removes an error message shown by Limit Login Attempts plugin.
 * NN attempts remaining. We don't need to give info to the attacker.
 * Making error null solves half of the problem. There is a wrapper with
 * a red border which we will remove with : login_error_message_hide_empty_error_container
 *
 * @param string $error
 * @return string
 * @see http://orbisius.com
 */
function login_error_message($error) {
    $error_fmt = strip_tags($error);

    // what about other languages other than english ?
    if (preg_match('#\d+\s+attempts?\s+remaining\.?#si', $error_fmt)) {
        $error = null;
    }

    return $error;
}

/**
 * This removes the error container if it doens't have tags in it.
 */
function login_error_message_hide_empty_error_container() {
    echo <<<BUFF_EOF
<script>
    try {
        if (jQuery.trim(jQuery('#login_error').text()) == '') {
            jQuery('#login_error').remove();
        }
    } catch (e) {
    }
</script>
BUFF_EOF;
}