Ensure LICENSE files are an exact copy of Apache LICENSE-2.0.txt [0].

[0] https://www.apache.org/licenses/LICENSE-2.0.txt

PiperOrigin-RevId: 366977125
Change-Id: I81216481bfbb53abd8155f55d8fdc1cab20d6b23

Author: tomhennigan

LICENSE

@@ -1,4 +1,3 @@
-Copyright 2019 DeepMind Technologies Limited.  All rights reserved.
 
                                  Apache License
                            Version 2.0, January 2004
@@ -188,7 +187,7 @@ Copyright 2019 DeepMind Technologies Limited.  All rights reserved.
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright [yyyy] [name of copyright owner].
+   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.