title: Remove legend key in matplotlib
body: <p>I want to show a legend text but without a key (the rectangular box or line that appears by default). </p>
  
  <pre><code>plt.hist(x, label = 'something')
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/tArcq.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tArcq.png" alt="enter image description here"></a></p>
  
  <p>I don't want the box next to the legend "something". How to remove it? </p>