Are there foods that can help eliminate stress, besides junk food?

Junk food. Junk food does not eliminate stress, but ultimately adds to it. It may be a "comfort food" or an attempt to self-soothe. There's no perfect diet for eliminating stress -- but colorful fruits and veggies can help counteract environmental oxidative stress. Emotional stress is a different issue, and you may want to discuss your particular stresses with a therapist who can help you manage them.
Yes. Highly colored fruits and vegetables are rich in vitamins, minerals and anti-oxidants; for example, all berries, melons, tomatoes, bell peppers.