Update deny.toml

[andrewmwells-amazon]

Description of changes

Removed unused license from allow list

Issue #, if available

Checklist for requesting a review

The change in this PR is (choose one, and delete the other options):

• [ ] A change "invisible" to users (e.g., documentation, changes to "internal" crates like cedar-policy-core, cedar-validator, etc.)

I confirm that this PR (choose one, and delete the other options):

• [ ] Does not update the CHANGELOG because my change does not significantly impact released code.

I confirm that cedar-spec (choose one, and delete the other options):

• [ ] Does not require updates because my change does not impact the Cedar formal model or DRT infrastructure.

[andrewmwells-amazon]

To be merged after https://github.com/cedar-policy/cedar/pull/1165

[shaobo-he-aws]

Merged #1165, rebased this PR, and restarted CI.