Removed undefined method _sessionCleanup()

In `app/code/community/Inchoo/SocialConnect/controllers/TwitterController.php` there's a function call on line 22:

``` php
$this->_sessionCleanup();
```

But that method doesn't exist. I've checked Magento 1.5, 1.8 & 1.9 but I can't find that method. So when I try to use the Twitter login and an exception is thrown I get this error:

```
Call to undefined method Inchoo_SocialConnect_TwitterController::_sessionCleanup()
```