chore: delete source-resolver artifacts (#3881)

# Description

## Problem\*

Resolves <!-- Link to GitHub Issue -->

## Summary\*

We've got some `source-resolver` artifacts clinging on to the repo which
this PR deletes.

## Additional Context



## Documentation\*

Check one:
- [ ] No documentation needed.
- [ ] Documentation included in this PR.
- [ ] **[Exceptional Case]** Documentation to be submitted in a separate
PR.

# PR Checklist\*

- [ ] I have tested the changes locally.
- [ ] I have formatted the changes with [Prettier](https://prettier.io/)
and/or `cargo fmt` on default settings.