You don't need it, it adds no value, and it takes up space - either measurable real estate or conceptual space. It's there because you thought it was important, or that you might want it or need it later. Those things might be true but, like the suitcase of next week's clothes when you're on a plane, you don't need 'em right now.
So you check it. You can still get it back when you need it, if you need it.