Remove the schemaorg dependencies since it is not used

[PGijsbers]

Change

Remove the pydantic_schemaorg dependency since it is not used.

How to Test

CI.

Checklist

• Tests have been added or updated to reflect the changes, or their absence is explicitly explained: Change has no effect on the application.
• Documentation has been added or updated to reflect the changes, or their absence is explicitly explained: Change has no effect on the application
• A self-review has been conducted checking:
  • No unintended changes have been committed.
  • The changes in isolation seem reasonable.
  • Anything that may be odd or unintuitive is provided with a GitHub comment explaining it (but consider if this should not be a code comment or in the documentation instead).
• All CI checks pass before pinging a reviewer, or provide an explanation if they do not.

Related Issues

[PGijsbers]

This was previously implicit because pydantic_schemaorg pins it to some specific 1.x version.

[Taniya-Das]

LGTM