Remove unused ajax file.

apps/contacts/ajax/loadphoto.php

-<?php
-/**
- * ownCloud - Addressbook
- *
- * @author Thomas Tanghus
- * @copyright 2012 Thomas Tanghus <thomas@tanghus.net>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
- *
- * You should have received a copy of the GNU Affero General Public
- * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
- 
-// Check if we are a user
-OCP\JSON::checkLoggedIn();
-OCP\JSON::checkAppEnabled('contacts');
-
-require_once 'loghandler.php';
-
-$id = isset($_GET['id']) ? $_GET['id'] : '';
-$refresh = isset($_GET['refresh']) ? true : false;
-
-if($id == '') {
-	bailOut(OC_Contacts_App::$l10n->t('Missing contact id.'));
-}
-
-$checksum = '';
-$vcard = OC_Contacts_App::getContactVCard( $id );
-foreach($vcard->children as $property){
-	if($property->name == 'PHOTO') {
-		$checksum = md5($property->serialize());
-		break;
-	}
-}
-
-OCP\JSON::success(array('data' => array('checksum'=>$checksum)));
-