How do I remove an array from an array?
<p>Here is my array: </p>

<pre><code>var myarray = [["d1", "sections/Dashboard-summary.html", "Dashboard"], 
               ["add", null, ""],
               ["20", "sections/MW-1-summary.html", "MW-1"],
               ["21", "sections/SB-5-summary.html", "SB-5"]]
</code></pre>

<p>How do I remove the second element <code>["add", null, ""]</code> so that the new array is </p>

<pre><code>[["d1", "sections/Dashboard-summary.html?781", "Dashboard"],
["20", "sections/MW-1-summary.html?903", "MW-1"],
["21", "sections/SB-5-summary.html?539", "SB-5"]]
</code></pre>

<p>That element might not always be in the second position but its first value will always be "add". How do I remove the array with the first value <code>(myarray[1][0])</code> of "add"?</p>
