[eprh] Remove hermes-parser (#34719)

We will be focusing eslint-plugin-react-hooks as the primary OSS-only
package for our lint plugin. eslint-plugin-react-compiler will remain as
a Meta only package as some limitations of our internal infra require us
to use packages that aren't widely adopted by the rest of the industry.

This PR removes `hermes-parser`, which was meant to support parsing Flow
syntax.