'This method delete coupon redemption'

@classmethod
def remove_coupon_redemption_from_cart(cls, user, cart):

    coupon_redemption = cls.objects.filter(user=user, order=cart)
    if coupon_redemption:
        coupon_redemption.delete()
        log.info(u'Coupon    redemption    entry    removed    for    user    %s    for    order    %s', user, cart.id)
