chore: remove duplicated copyright

packages/helix-shared-string/src/string.js

@@ -60,18 +60,6 @@ export function multiline(str) {
     .join('\n');
 }
 
-/*
- * Copyright 2020 Adobe. All rights reserved.
- * This file is licensed 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 REPRESENTATIONS
- * OF ANY KIND, either express or implied. See the License for the specific language
- * governing permissions and limitations under the License.
- */
-
 /**
  * Splits the given name at the last '.', returning the extension and the base name.
  * @param {string} name Filename