title: NVD3 - removing options for stackedAreaChart
body: <p>I'm using the <a href="http://nvd3.org/ghpages/stackedArea.html" rel="nofollow noreferrer">stacked area chart</a> in NVD3, but I don't want it to show the three options for Stacked, Stream, and Expanded. </p>
  
  <p>Is there a flag I can pass to remove the UI element to switch between them and pick which one to use?</p>
  
  <p><img src="https://i.stack.imgur.com/4mtbS.png" alt="enter image description here"></p>