title: Remove all of x axis labels in ggplot
body: <p>I need to remove everything on the x-axis including the labels and tick marks so that only the y-axis is labeled.  How would I do this?</p>
  
  <p>In the image below I would like 'clarity' and all of the tick marks and labels removed so that just the axis line is there.</p>
  
  <p><strong>Sample ggplot</strong></p>
  
  <pre><code>data(diamonds)
  ggplot(data = diamonds, mapping = aes(x = clarity)) + geom_bar(aes(fill = cut))
  </code></pre>
  
  <p><strong>ggplot Chart:</strong></p>
  
  <p><a href="https://i.stack.imgur.com/PnUYc.png" rel="noreferrer"><img src="https://i.stack.imgur.com/PnUYc.png" alt="enter image description here"></a></p>
  
  <p><strong>Desired chart:</strong></p>
  
  <p><a href="https://i.stack.imgur.com/HEwbC.png" rel="noreferrer"><img src="https://i.stack.imgur.com/HEwbC.png" alt="enter image description here"></a></p>