Move non-license comments out of license header

Summary: Changelog: [General] [Fixed] - License header cleanup

Reviewed By: cpojer

Differential Revision: D17749100

fbshipit-source-id: edca9c73a065e9fc311109cd6efeb1f75451a55a

ReactAndroid/src/main/java/com/facebook/react/modules/core/ChoreographerCompat.java

@@ -3,9 +3,10 @@
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *  This file was pulled from the facebook/rebound repository.
  */
+
+// This file was pulled from the facebook/rebound repository.
+
 package com.facebook.react.modules.core;
 
 import android.os.Handler;