Removed dependencies that cargo-machete claimed were unnecessary

[sureshjoshi]

This is a naive slash. I haven't looked into each dependency yet to see if "does it compile" is enough of a metric to safely remove the dep.

Also, I need to review the lock file to see if any of the constraints version changes matter

[sureshjoshi]

This was a fail. cargo build is not representative of the dependencies we need/use in our project - as it looks like cargo test requires deps that machete misses.

[tgolsson]

I guess those should be in [dev-dependencies] then, so might still save some time in recompilation.

[sureshjoshi]

I guess those should be in [dev-dependencies] then, so might still save some time in recompilation.

Yep, I'm working on a different ticket right now - but I was going to go through and re-do what I was doing with cargo test as well as build/check.

We should always have dependencies as localized as possible, so yeah, those should definitely be dev-deps, not regular deps.