It is better to have the energy to get through the workout with a high level of intensity than have a bad workout because you are carb depleted. If getting lean is your main concern, try going without and see how you do. If your body continues to change, then great – you are one of the lucky ones. However, if you find you are not getting leaner, your body’s likely suffering an energy deficit during workouts so that you cannot train hard enough. The general recommendation is to eat 20-40 grams of slow digesting carbs 30-60 minutes pre-workout. You can start there and see how that plan goes. Just don’t be too rigid one way or the other.