Deletes an account-level monthly spending limit override for sending notify messages. Deleting a spend limit override will set the <code>EnforcedLimit</code> to equal the <code>MaxLimit</code>, which is controlled by Amazon Web Services. For more information on spend limits (quotas) see <a href="https://docs.aws.amazon.com/sms-voice/latest/userguide/quotas.html">Quotas </a> in the <i>End User Messaging SMS User Guide</i>.