Disable The Events Calendar's REST API functionality.
<?php
/**
* Disable The Events Calendar's REST API functionality.
*
* Note that trying to import events from a site with the REST API disabled...
* into another site running The Events Calendar... via Event Aggregator...
* will cause this import setup/scheme to no longer function, since
* Event Aggregator uses the REST API to pull events from one TEC site
* into another TEC site.
*
* Requires The Events Calendar version 4.6.10 or greater.
*
* @link https://gist.github.com/cliffordp/37f45031be10f30e27dbba63b46bcec6
* @link https://theeventscalendar.com/maintenance-release-for-the-week-of-22-january-2018/
*/
add_filter( 'tribe_events_rest_api_enabled', '__return_false' );