fix: remove overlay props from datefield type signature

[nwidynski]

Found in testing. Seem to have slipped in without any use?

✅ Pull Request Checklist:

• Included link to corresponding React Spectrum GitHub Issue.
• Added/updated unit tests and storybook for this change (for new code or code which already has tests).
• Filled out test instructions.
• Updated documentation (if it already exists for this component).
• Looked at the Accessibility Practices for this feature - Aria Practices

📝 Test Instructions:

🧢 Your Project:

[reidbarber]

Good catch!

[LFDanLu]

LGTM, seems to have been a carry over from when we only had Datepicker props as a base prop, thanks for the catch!