title: remove xcode recent projects from dock menu
body: <p>I would like to remove from Mac OS-X taskbar (Dock) the XCode's recent project menu items.<br>
  Everywhere I am searching it says the <code>File-&gt;Open Recent-&gt;Clear Menu</code> it will clear, but not.<br>
  It doesn't clear from Dock, it clears from inside the <code>XCode</code> Recent menu.<br>
  I believe I should dig somewhere is OS filesystem, but I don't know where.</p>
  
  <p>It was an <code>XCode 4.2</code> intalled, I did a complete uninstall and installed version 4.3.<br>
  But I couldn't clear the Dock's projects menu at version 4.3 either!</p>