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._

Abre el README del repositorio y localiza la sección de licencia pegada que comienza con “License” y “Copyright 2018 Google, Inc.”. Elimina ese bloque incorrecto y, después, revisa el README renderizado y el diff para confirmar que el resto de la documentación no ha cambiado.

Escrito por el modelo de indexación a partir del texto del issue.