chore: fix copyright (#903)

utils/set-version.js

@@ -1,13 +1,12 @@
 #!/usr/bin/env node
 /**
- * Copyright 2019 Google Inc. All rights reserved.
- * Modifications copyright (c) Microsoft Corporation.
+ * Copyright (c) Microsoft Corporation.
  *
  * Licensed 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
+ * 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,