[deno] Remove kludge for type properties

[andyleiserson]

The issue that interfered with this before was fixed in Deno.

Fixes #7778.

Testing
Access to GPUCompilationMessage.type is exercised by CTS tests that are enabled, and is what found this issue originally.

Squash or Rebase? Squash

Checklist

• Run cargo fmt.
• Run taplo format.
• Run cargo clippy --tests. If applicable, add:
  • --target wasm32-unknown-unknown
• Run cargo xtask test to run tests.
• If this contains user-facing changes, add a CHANGELOG.md entry.