## Motivation and Context
- #2087
## Description
- remove lingering usages of SystemTime::now()
- ensure they don't return by adding a clippy.toml
## Testing
- CI
- Ran the webassembly example
## Checklist
<!--- If a checkbox below is not applicable, then please DELETE it
rather than leaving it unchecked -->
- [ ] I have updated `CHANGELOG.next.toml` if I made changes to the
smithy-rs codegen or runtime crates
- [ ] I have updated `CHANGELOG.next.toml` if I made changes to the AWS
SDK, generated SDK code, or SDK runtime crates
----
_By submitting this pull request, I confirm that you can use, modify,
copy, and redistribute this contribution, under the terms of your
choice._
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Co-authored-by: John DiSanti <jdisanti@amazon.com>
Russell Cohen