Remove copyright date

[bryceitoc9]

We open all of our files with:

/*!
 * Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 * SPDX-License-Identifier: Apache-2.0
 */

We need to change this to:

/*!
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 * SPDX-License-Identifier: Apache-2.0
 */

(or something similar)

We should ideally time this at a point where we don't have any open PRs.

[justinmk3]

Updated the description/title to remove the year instead of increment it.

See also https://github.com/awslabs/aws-c-common/pull/648

[JadenSimon]

Fixed with https://github.com/aws/aws-toolkit-vscode/pull/3544