Update LICENSE (GoogleCloudDataproc#83)

As requested in b/70893145, any repository that is expected to be Apache 2.0 should have the exact license file from Apache with no modifications.

Author: chenyumic

LICENSE

@@ -1,4 +1,3 @@
-
                                  Apache License
                            Version 2.0, January 2004
                         http://www.apache.org/licenses/
@@ -187,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright 2014 Google, Inc.
+   Copyright [yyyy] [name of copyright owner]
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.