title: Why does brew cleanup or brew cleanup -n don't show any output?
body: <p>I would love to clean my device of any homebrew update or version copies and then I figured that the command used for that would be</p>
  <pre><code>brew cleanup
  </code></pre>
  <p>and if I wanted to check how much of storage it would clear, the command would be</p>
  <pre><code>brew cleanup -n
  brew cleanup --dry-run
  </code></pre>
  <p>None of them seem to work for me, and I want to clear my computer of any extra useless copies of Homebrew.</p>
  <p>Also, would it be possible that it is actually happening but it is not showing me any output?</p>
  <p>Here is the output:</p>
  <pre><code>temp@Apples-MacBook-Pro ~ % brew cleanup -n
  temp@Apples-MacBook-Pro ~ % brew cleanup   
  temp@Apples-MacBook-Pro ~ % 
  </code></pre>
  <p>All I need is some output showing how much space can be cleared / is cleared when I run the command.</p>
  <p>Would it be possible that since I installed home-brew just yesterday, there is nothing to delete and hence this output?</p>