title: Remove border around vegaEmbed geoshape generated by altair?
body: <p>In the below image, observe the border around a map generated from <code>Chart.save()</code> to either HTML or JSON canvas (the border is inside the canvas, not CSS styled).</p>
  
  <p><a href="https://i.stack.imgur.com/ltLhv.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ltLhv.jpg" alt="enter image description here"></a></p>
  
  <p>For any other type of mark, one would expect to be able to use <code>Chart.configure_view()</code> to set <code>strokeWidth=0</code> to remove the border, but this does not appear to affect this geoshape chart.</p>
  
  <p>The vegaEmbed <a href="https://github.com/vega/vega-embed#options" rel="nofollow noreferrer">embed options</a> do not appear to document what creates this border.</p>
  
  <p>Is it possible to style or remove the border?</p>