Remove deprecated methods and classes

[Splatcrafter]

Summary

This PR removes deprecated methods and classes (TestData.jackson(), GsonOps, and JacksonOps). References to the deprecated TestData.jackson() have been updated to use TestData.jacksonJson().

Type of Change

• Bug fix
• New feature
• Breaking change
• Refactoring
• Documentation
• Build / CI

Related Issues

• No related issues were addressed in this PR.

Changes

• Removed TestData.jackson() and updated references to TestData.jacksonJson().
• Removed GsonOps and JacksonOps classes.

Verification

• Unit tests added/updated
• Existing tests pass
• Manual verification performed (if applicable)

Breaking Changes

• Users must switch from TestData.jackson() to TestData.jacksonJson().
• de.splatgames.aether.datafixers.codec.gson.GsonOps and JacksonOps are no longer available; dependent code must be updated accordingly.

Checklist

• Code follows project conventions
• Public APIs are documented
• Tests cover new behavior
• No unnecessary dependencies added

[github-actions]

⚠️ Deprecation Warning: The deny-licenses option is deprecated for possible removal in the next major release. For more information, see issue 997.

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None