chore: remove old parser (#1034)

[![PR App][icn]][demo] | Fix RM-9912
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## 🧰 Changes

Removes a now obsolete (and unused) parser.

## 🧬 QA & Testing

- [Broken on production][prod].
- [Working in this PR app][demo].


[demo]: https://markdown-pr-PR_NUMBER.herokuapp.com
[prod]: https://SUBDOMAIN.readme.io
[icn]:
https://user-images.githubusercontent.com/886627/160426047-1bee9488-305a-4145-bb2b-09d8b757d38a.svg