title: Files missing warning after upgrading to Xcode 8 and converting syntax from swift 2.3 to swift 3.0
body: <p>I upgraded from <code>Xcode 7.3</code> to <code>Xcode 8.0</code> and changed syntax from <code>swift 2.3 to swift 3.0</code>. I am able to build the project and run fine but I got some 233 warnings all about images I used in <code>Assets.xcassets.</code> </p>
  
  <p>I realized that the path is wrong as I changed the name of my project from <code>projectA to projectB</code> and the path is referring to an invalid path which is </p>
  
  <pre><code>/Users/name/Desktop/projectA/projectB/Assets.xcassets/Images/img_01.imageset/img_01@2x.png is missing from working copy
  </code></pre>
  
  <p>I believe that I have to remove name of those files from my <code>sourcecontrol</code> as they are not valid anymore. I have committed all my changes and have no idea how to remove these missing file links to get rid of those warnings.</p>