title: Value of type 'Array<Any>?' has no member 'removeAtIndex'
body: <p>I tried to use <strong>removeAtIndex</strong> function to delete item from my array, but when I run the code I get an error that "Value of type 'Array?' has no member 'removeAtIndex'".
  Maybe somebody had the same problem and can help me to solve it, here is my code:</p>
  
  <pre><code>var cards:Array&lt;Any&gt;?
  let i : Int = (sender.layer.value(forKey: "index")) as! Int
      cards.removeAtIndex(i)
  </code></pre>
  
  <p>Thank You!</p>