title: Clear list of "Unavailable Migrations" (Symfony 3)
body: <p>There are some migrations, that was deleted, and left at the list of "Unavailable Migrations". How can I clear it, because every time notice message annoy a little bit. My guess is </p>
  
  <p><code>migrations:doctrine:version</code></p>
  
  <p><a href="https://i.stack.imgur.com/LXtdJ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/LXtdJ.png" alt="console"></a></p>