Remove unused AWS variables

[sarayourfriend]

Fixes

No issue exists for this, I just noticed it while working on an implementation plan and it was easy to open a PR for.

Description

Removes the AWS client secrets from the API. These aren't configured in production and are unused in the application, so it's effectively dead code.

Testing Instructions

CI should pass. Confirm the variables are not used.

Checklist

• My pull request has a descriptive title (not a vague title likeUpdate index.md).
• My pull request targets the default branch of the repository (main) or a parent feature branch.
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• [N/A] I added or updated tests for the changes I made (if applicable).
• [N/A] I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no visible errors.
• [N/A] I ran the DAG documentation generator (if applicable).

Developer Certificate of Origin

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[AetherUnbound]

Awesome!

[stacimc]

Nice!