My first thought was how do I get rid of it? Here's how:
- Hold the alt/option key down.
- Navigate the mouse up to the icon.
- Click/hold the icon and drag it off the bar.
My second thought was how to restore it? Here's how:
- Navigate to System\Library\CoreServices\Menu Extras
- Click/hold the Eject.menu file.
- Drag it up to the upper right-hand portion of the task bar (near the clock).
- Drop it between any of the existing icons (much like adding an icon to the dock).
I'm not quite clear how mine just appeared, but I realized that on certain machines (i.e. desktop Macs with Superdrives that have trays), it can be a useful feature.
