Update docs/languages/en/user-guide/unit-testing.rst

Remove Test your console router
-------------------------------

Since no Console Routes are setup in the [ZendSkeletonApplication config](https://github.com/zendframework/ZendSkeletonApplication/blob/master/module/Application/config/module.config.php) I would argue that this is confusing to the user to have this here. As if they add it to there Test it will produce failures.