chore: update license to remove date

Every file needs to have the copyright date update
on every change.
This is complicated and prone to error.
Better to update all license files to remove the date.

Author: seebees

modules/cache-material/src/build_cryptographic_materials_cache_key_helpers.ts

@@ -1,17 +1,5 @@
-/*
- * Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"). You may not use
- * this file except in compliance with the License. A copy of the License is
- * located at
- *
- *     http://aws.amazon.com/apache2.0/
- *
- * or in the "license" file accompanying this file. This file is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
- * implied. See the License for the specific language governing permissions and
- * limitations under the License.
- */
+// Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
 
 import {
   SupportedAlgorithmSuites, // eslint-disable-line no-unused-vars

modules/cache-material/src/caching_cryptographic_materials_decorators.ts

@@ -1,17 +1,5 @@
-/*
- * Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"). You may not use
- * this file except in compliance with the License. A copy of the License is
- * located at
- *
- *     http://aws.amazon.com/apache2.0/
- *
- * or in the "license" file accompanying this file. This file is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
- * implied. See the License for the specific language governing permissions and
- * limitations under the License.
- */
+// Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
 
 import {
   GetEncryptionMaterials, // eslint-disable-line no-unused-vars