[WordPress/Plugin] WP SiteManager のメタタグの出力を止める

gistfile1.php

<?php

global $WP_SiteManager;
if (is_object($WP_SiteManager) && isset($WP_SiteManager->instance->meta_manager)) {
	$meta_manager = $WP_SiteManager->instance->meta_manager;
	remove_action( 'wp_head', array( $meta_manager, 'output_meta' ), 0 );
}