removed neutronics features

[shimwell]

Proposed changes

After many many attempts I think this is the best split of the two packages so far. This is still under development as it requires another package that doesn't exist quite yet. So not ready to be merged as we would lose a lot of functionality.

This removes neutronics simulations for the paramak. This makes the parmak easier to install, distribute for users that just want the geometry. It is also easier to maintain for the developers.

I am hoping this makes a conda install easier

Types of changes

• [ ] Bugfix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] Code refactoring
• [ ] Documentation Update (if none of the other choices apply)
• [ ] New tests

Checklist

• [ ] Pep8 applied
• [ ] Unit tests pass locally with my changes
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation (if appropriate)

[codecov[bot]]

Codecov Report

Merging #842 (34b69a5) into develop (f38485d) will increase coverage by 2.85%. The diff coverage is 67.00%.

@@             Coverage Diff             @@
##           develop     #842      +/-   ##
===========================================
+ Coverage    94.68%   97.53%   +2.85%     
===========================================
  Files           75       72       -3     
  Lines         5401     4750     -651     
===========================================
- Hits          5114     4633     -481     
+ Misses         287      117     -170     

Impacted Files	Coverage Δ
paramak/shape.py	97.02% <33.33%> (-0.86%)	:arrow_down:
paramak/reactor.py	90.70% <50.00%> (-1.18%)	:arrow_down:
paramak/utils.py	89.71% <67.77%> (-7.60%)	:arrow_down:
paramak/__init__.py	100.00% <100.00%> (ø)
paramak/parametric_reactors/iter_paper_2020.py	100.00% <100.00%> (ø)

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