removed anonymous type constructor from Contract.cs

[andygruening]

Issue from Pikes Arena when code stripping is enabled.

Version Increment

Please ensure you have incremented the package version in the package.json as necessary.

• I have incremented the package.json according to semantic versioning
• No version increment is needed; the change does not impact SDK or Sample code/assets

Docs Checklist

Please ensure you have addressed documentation updates if needed as part of this PR:

• I have created a separate PR on the sequence docs repository for documentation updates: Link to docs PR
• No documentation update is needed for this change.

[cloudflare-workers-and-pages]

Deploying sequence-unity with    Cloudflare Pages

Latest commit:	522c07e
Status:	✅  Deploy successful!
Preview URL:	https://1bd9b3b7.sequence-unity.pages.dev
Branch Preview URL:	https://remove-anonymous-constructor.sequence-unity.pages.dev

View logs