<frontend>
    <events>
        <controller_action_predispatch>
            <observers><log><type>disabled</type></log></observers>
        </controller_action_predispatch>
        <controller_action_postdispatch>
            <observers><log><type>disabled</type></log></observers>
        </controller_action_postdispatch>
        <customer_login>
            <observers><log><type>disabled</type></log></observers>
        </customer_login>
        <customer_logout>
            <observers><log><type>disabled</type></log></observers>
        </customer_logout>
        <sales_quote_save_after>
            <observers><log><type>disabled</type></log></observers>
        </sales_quote_save_after>
        <checkout_quote_destroy>
            <observers><log><type>disabled</type></log></observers>
        </checkout_quote_destroy>
    </events>
</frontend>