Should we include a ‘collapse’ on this page?

We're developing a page, where the user can unsubscribe at the top of the page, and 'email preferences' at the bottom.

The question is, once the user has 'expanded' to see the preferences, does he need to have the ability to 'close'? The 'close' in this case doesn't serve any function, because the expanded area is not covering anything else the user may want to see.

See my screenshots attached.