Removed test.db from version control (#35)

## Notion ticket link
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## Checklist
- [ ] My PR name is descriptive and in imperative tense
- [ ] My commit messages are descriptive and in imperative tense. My
commits are atomic and trivial commits are squashed or fixup'd into
non-trivial commits
- [ ] I have run the appropriate linter(s)
- [ ] I have requested a review from the PL, as well as other devs who
have background knowledge on this PR or who will be building on top of
this PR

Author: ebwu95