D3: rimuovere un elemento

    <svg>
    <circle cx="60" cy="75" r="40" />
    <circle cx="150" cy="75" r="40" />
</svg>

<script>
    d3.select("circle")
      .remove()
</script>       
    <svg>
    <circle cx="60" cy="75" r="40" />
    <circle cx="150" cy="75" r="40" />
</svg>

<script>
    d3.select("circle")
      .remove()
</script>