Deletes an account-level monthly spending limit override for sending multimedia messages (MMS). 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 for Server Migration Service</a> in the <i>Server Migration Service User Guide</i>.