Your body DOES need carbs and it's a matter of choosing the RIGHT carbs......complex/fibrous carbs such as brown rice, sweet potatoes, green veggies (dark greens, spinach, and the like), oatmeal are more dense & will stick with you for a longer period of time & give you more energy over say peas & carrots, which are not very dense & are sugary.
IMO, there is no reason to completely eliminate carbs, but it would do you better to eat the right carbs.....
It's the same with certain types of fats - your body cannot produce EFA's thus you need to feed them to your body in the forms of healthy nuts, olive oil, avocado, flax, etc.....