title: How do I unset a variable in the fish shell?
body: <p>In bash I can unset a variable with </p>
  
  <pre><code>unset myvar
  </code></pre>
  
  <p>In fish I get </p>
  
  <pre><code>fish: Unknown command 'unset'
  </code></pre>
  
  <p>What's the equivalent for unset in fish.</p>