Joomla 3.4.5 sef remove article id SOLVED

Description: remove article id at sef url: id-alias.
File edit: components\com_content\router.php
#Step 1: 2 line replace all
$advanced = $params->get('sef_advanced_link', 0);
to
$advanced = $params->get('sef_advanced_link', 1);

#Step2:
if (strpos($segments[0], ':') === false)
{
$vars['view'] = 'article';
$vars['id'] = (int) $segments[0];

return $vars;
}
to
/*if (strpos($segments[0], ':') === false)
{
$vars['view'] = 'article';
$vars['id'] = (int) $segments[0];

return $vars;
}
*/