MARC: remove read_many call to vocab service

[carlinmack]

:heart: Thank you for your contribution!

Close https://github.com/zenodo/ops/issues/423

Description

Please describe briefly your pull request.

The license data is already indexed in the record itself and we were calling to get the license vocabulary every time which was expensive and is unnecessary.

Checklist

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• [x] I'm aware of the code of conduct.
• [x] I've created logical separate commits and followed the commit message format.
• [ ] I've added relevant test cases.
• [ ] I've added relevant documentation.
• [ ] I've marked translation strings (for relevant code).
• [ ] I've followed the CSS/JS and React guidelines (for relevant code).
• [ ] I've followed the web accessibility guidelines (for relevant code).
• [ ] I've followed the user interface guidelines (for relevant code).
• [ ] I've identified the copyright holder(s) and updated copyright headers for touched files (>15 lines contributions).
• [x] I've NOT included third-party code (copy/pasted source code or new dependencies).

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