We do not support updates from 4.5 > 7.0

apps/files/appinfo/update.php

@@ -1,46 +0,0 @@
-<?php
-
-// fix webdav properties,add namespace in front of the property, update for OC4.5
-$installedVersion=OCP\Config::getAppValue('files', 'installed_version');
-if (version_compare($installedVersion, '1.1.6', '<')) {
-	$concat = OC_DB::getConnection()->getDatabasePlatform()->
-		getConcatExpression( '\'{DAV:}\'', '`propertyname`' );
-	$query = OC_DB::prepare('
-		UPDATE `*PREFIX*properties`
-		SET    `propertyname` = ' . $concat . '
-		WHERE  `propertyname` NOT LIKE \'{%\'
-	');
-	$query->execute();
-}
-
-//update from OC 3
-
-//try to remove remaining files.
-//Give a warning if not possible
-
-$filesToRemove = array(
-	'ajax',
-	'appinfo',
-	'css',
-	'js',
-	'l10n',
-	'templates',
-	'admin.php',
-	'download.php',
-	'index.php',
-	'settings.php'
-);
-
-foreach($filesToRemove as $file) {
-	$filepath = OC::$SERVERROOT . '/files/' . $file;
-	if(!file_exists($filepath)) {
-		continue;
-	}
-	$success = OCP\Files::rmdirr($filepath);
-	if($success === false) {
-		//probably not sufficient privileges, give up and give a message.
-		OCP\Util::writeLog('files', 'Could not clean /files/ directory.'
-				.' Please remove everything except webdav.php from ' . OC::$SERVERROOT . '/files/', OCP\Util::ERROR);
-		break;
-	}
-}