Update license text in README's

README.md

@@ -311,21 +311,4 @@ see instructions in the main [README](../README.md#development).
 
 ## License
 
-This software is licensed under the Apache 2 license, quoted below.
-
-    Licensed to Elasticsearch B.V. under one or more contributor
-    license agreements. See the NOTICE file distributed with
-    this work for additional information regarding copyright
-    ownership. Elasticsearch B.V. 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.
+This software is licensed under the [Apache 2 license](./LICENSE).