Magento\Email\Model\Template\Filter Comment vs Code

The comment here 
https://github.com/magento/magento2/blob/develop/app/code/Magento/Email/Model/Template/Filter.php#L171 states

```
Doesn't set anything intentionally
```

vs the actual code

```
public function setUseSessionInUrl($flag)
{
    $this->_useSessionInUrl = $flag;
    return $this;
}
```

so either the comment needs to be corrected or `$this->_useSessionInUrl = $flag;` removed.
