Update zxing.appspot.com app to work with latest GCloud SDK

zxing.appspot.com/src/main/webapp/WEB-INF/appengine-web.xml

@@ -1,20 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
- Copyright (C) 2008 ZXing authors
-
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
- -->
-<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
-  <application>zxing-hrd</application>
-  <version>13</version>
-</appengine-web-app>

zxing.appspot.com/src/main/webapp/app.yaml

@@ -1,5 +1,3 @@
-application: zxing-hrd
-version: 13
 runtime: python27
 api_version: 1
 threadsafe: true