Hidden Taxonomy Dependency (taxonomy_node_get_terms())

My maillog has been getting spammed on every cron job with the following message:

<b>Fatal error</b>:  Call to undefined function taxonomy_node_get_terms() in <b>/var/www/html/sites/all/modules/boost/boost.module</b> on line <b>349</b><br />

Apparently, this is a hidden dependency on the Taxonomy module.
This error is happening because I do not have the taxonomy module enabled.
On this particular server, I do not want taxonomy enabled.

Please fix boost so that this function is called only when the taxonomy module is enabled, if possible.