Remove license from README

Remove the wrong license information (pasted below) from the readme file

_License
Copyright 2018 Google, Inc.

All image and audio files (including *.png, *.jpg, *.svg, *.mp3, *.wav and *.ogg) are licensed under the CC BY 4.0 license. All other files are licensed under the Apache 2 license.

Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the LICENSE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you 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._

Apri il README del repository e individua la sezione della licenza incollata che inizia con “License” e “Copyright 2018 Google, Inc.”. Rimuovi quel blocco errato, quindi esamina il README renderizzato e il diff per confermare che il resto della documentazione non sia cambiato.

Scritto dal modello di indicizzazione a partire dal testo della issue.