title: "Unlinked kegs in your Cellar". How do I remove them?
body: <p>After installing and uninstalling some programs through <code>brew</code> and <code>brew cask</code>, now I get <code>brew doctor</code> saying "unlinked kegs in your Cellar".</p>
  
  <p>It suggests to link them, to avoid build trouble with later brews, but instead I'd rather delete them, as they're leftovers from brew programs or formulas that I don't use anymore.</p>
  
  <p>How or where do I remove these? (I don't even know what a keg, or the Cellar, is)</p>