title: Remove options for Map's List
body: <p>I have a map of type:</p>
  
  <pre><code>Map[Int, Seq[Option[User]]]
  </code></pre>
  
  <p>I want to transform this to:</p>
  
  <pre><code>Map[Int, Seq[User]]
  </code></pre>
  
  <p>I just want to remove any Option[User] from the Seq.</p>