remove deps in pyproject.toml

[mikemhenry]

Checklist

• Added a news entry

Developers certificate of origin

• I certify that this contribution is covered by the MIT License here and the Developer Certificate of Origin at https://developercertificate.org/.

Same as OpenFreeEnergy/gufe#511

These deps don't really help anyone install or test the package and just get in the way of tooling

[github-actions]

No API break detected ✅

[mikemhenry]

The docs might break since they do use pyproject.toml to install deps if they are listed, but this could actually speed up the build since locally when I created the env for the docs, I only used the yaml, but RTD uses the yaml + the pyproject.toml

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.51%. Comparing base (31bb2a7) to head (5c7680b).
Report is 95 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1191      +/-   ##
==========================================
- Coverage   94.15%   92.51%   -1.65%     
==========================================
  Files         141      141              
  Lines       10588    10588              
==========================================
- Hits         9969     9795     -174     
- Misses        619      793     +174     

Flag	Coverage Δ
fast-tests	92.51% <ø> (?)
slow-tests	?

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[mikemhenry]

looks like that didn't break anything!