Bug 1611995: Remove redundant file

This file was accidentally left in place when profileicons
were moved from internal artefacts to file artefacts. It's
now redundant with artefact/file/profileicons.json.php

Change-Id: I544cda768e636a0076595ed64f49425fe1607e41
behatnotneeded: Covered by existing tests

htdocs/artefact/internal/profileicons.json.php

-<?php
-/**
- *
- * @package    mahara
- * @subpackage core
- * @author     Catalyst IT Ltd
- * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL version 3 or later
- * @copyright  For copyright information on Mahara, please see the README file distributed with this software.
- *
- */
-
-define('INTERNAL', 1);
-define('JSON', 1);
-require(dirname(dirname(dirname(__FILE__))) . '/init.php');
-
-$result = get_records_sql_array('SELECT a.id, a.title, a.note, (u.profileicon = a.id) AS isdefault
-    FROM {artefact} a
-    LEFT OUTER JOIN {usr} u
-    ON (u.id = a.owner)
-    WHERE artefacttype = \'profileicon\'
-    AND a.owner = ?
-    ORDER BY a.id', array($USER->get('id')));
-
-if(!$result) {
-    $result = array();
-}
-
-json_headers();
-$data['error'] = false;
-$data['data'] = $result;
-$data['count'] = ($result) ? count($result) : 0;
-echo json_encode($data);