WordPress at a glance
function is not described

_wp_delete_tax_menu_item() WP 3.0.0

Serves as a callback for handling a menu item when its original object is deleted.

No Hooks.

Return

Nothing (null).

Usage

_wp_delete_tax_menu_item( $object_id, $tt_id, $taxonomy );
$object_id(int)
The ID of the original object being trashed.
Default: 0
$tt_id(int) (required)
Term taxonomy ID. Unused.
$taxonomy(string) (required)
Taxonomy slug.

Code of wp delete tax menu item: wp-includes/nav-menu.php VER 5.0.3

<?php
function _wp_delete_tax_menu_item( $object_id = 0, $tt_id, $taxonomy ) {
	$object_id = (int) $object_id;

	$menu_item_ids = wp_get_associated_nav_menu_items( $object_id, 'taxonomy', $taxonomy );

	foreach ( (array) $menu_item_ids as $menu_item_id ) {
		wp_delete_post( $menu_item_id, true );
	}
}