Update README.md and delete content directory

README.md

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 # NOTICE
 
-**This repository is archived and the content on this branch is out of date.** You can find up-to-date AWS technical documentation on the [AWS Documentation website](https://docs.aws.amazon.com/), where you can also submit feedback and suggestions for improvement.
+This repository is archived, read-only, and no longer updated. For more information, read [the announcement on the AWS News Blog](https://aws.amazon.com/blogs/aws/retiring-the-aws-documentation-on-github/).
 
-# Announcement
-
-This repository will be archived and marked read-only next month (June 2023). For more information, read [the announcement on the AWS News Blog](https://aws.amazon.com/blogs/aws/retiring-the-aws-documentation-on-github/).
-
-You can find the corresponding content for this repo on [the AWS Documentation website](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide). If you'd like to continue contributing to the quality of AWS documentation, you can submit feedback and suggestions for improvement there.
-
-## Amazon RDS User Guide
-
-The open source version of the Amazon RDS docs. You can submit feedback & requests for changes by submitting issues in this repo or by making proposed changes & submitting a pull request.
-
-## License Summary
-
-The documentation is made available under the Creative Commons Attribution-ShareAlike 4.0 International License. See the LICENSE file.
-
-The sample code within this documentation is made available under a modified MIT license. See the LICENSE-SAMPLECODE file.
-
-## Default branch
-The default branch for this repo has changed to `main`.
-If you have cloned the previous default branch, please update your local repo to use the `main` branch.
+You can find up-to-date AWS technical documentation on the [AWS Documentation website](https://docs.aws.amazon.com/), where you can also submit feedback and suggestions for improvement.