Remove unused packages in `requirements.txt`

[maxachis]

Context

There are a number of packages which we likely don't need and where their inclusion just adds confusion and slows down setup. For example:

• If we have flask-restx, we probably don't need Flask-RESTful
• Since we don't perform any complex mathematical operations, it's doubtful that we need numpy.
• We don't appear to use tqdm in our library.

And there are likely others like this.

Requirements

• Remove unused packages from requirements.txt
• The simplest way to figure this out is to iterate through packages, uninstall them, and then rerun tests to ensure they still pass.
• In addition to eyeballing requirements, pipreqs might provide a simple way to identify which ones aren't utilized.

Tests

• All tests should continue to pass.

Docs

• Documentation should be unaffected

Open questions

• Naturally, which packages should be uninstalled.