Remove unused file

That file is apparently unused - introduced with 30b58f5677

I guess we can remove it...

apps/files_versions/appinfo/api.php

@@ -1,34 +0,0 @@
-<?php
-/**
-* ownCloud
-*
-* @author Michael Gapczynski
-* @copyright 2012 Michael Gapczynski mtgap@owncloud.com
-*
-* 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/>.
-*/
-
-return array(
-	'list' => array('method' => 'GET', 'class' => 'Storage', 'function' => 'getVersions',
-		'parameters' => array(
-			'file' => array('required' => true, 'type' => 'string')
-		)
-	),
-	'revert' => array('method' => 'POST', 'class' => 'Storage', 'function' => 'rollback',
-		'parameters' => array(
-			'file' => array('required' => true, 'type' => 'string'),
-			'time' => array('required' => true, 'type' => 'int')
-		)
-	)
-);