If you are undetectable, for 6+ months, and do not have
drug failure or multi-resistence profiles you may be OK to drop the boosted atazanavir as this may be beneficial for your liver.
Also there's some other factors that need to be taken into consideration - ie age, number of years in ARV therapy, and most importantly, other symptoms. Have you been feeling excessively tired, nauseous, or had abdominal pain?