Revert "Lens class refactor"

[nkhadka21]

Reverts #269

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[codecov]

Codecov Report

Attention: Patch coverage is 90.05525% with 18 lines in your changes missing coverage. Please review.

Project coverage is 90.12%. Comparing base (5cc87c5) to head (401b105).

Files with missing lines	Patch %	Lines
slsim/LsstSciencePipeline/lsst_science_pipeline.py	75.75%	8 Missing ⚠️
slsim/lens_pop.py	28.57%	5 Missing ⚠️
slsim/lens.py	95.55%	4 Missing ⚠️
slsim/LsstSciencePipeline/opsim_pipeline.py	95.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #272      +/-   ##
==========================================
- Coverage   97.37%   90.12%   -7.26%     
==========================================
  Files          71       72       +1     
  Lines        4873     5203     +330     
==========================================
- Hits         4745     4689      -56     
- Misses        128      514     +386     

Files with missing lines	Coverage Δ
slsim/Deflectors/elliptical_lens_galaxies.py	94.91% <ø> (ø)
slsim/Sources/galaxies.py	99.29% <100.00%> (ø)
slsim/Sources/source.py	99.00% <100.00%> (+0.42%)	⬆️
slsim/image_simulation.py	100.00% <100.00%> (ø)
slsim/lensed_system_base.py	71.87% <100.00%> (+7.94%)	⬆️
slsim/LsstSciencePipeline/opsim_pipeline.py	39.06% <95.00%> (ø)
slsim/lens.py	96.62% <95.55%> (+3.85%)	⬆️
slsim/lens_pop.py	87.87% <28.57%> (-12.13%)	⬇️
slsim/LsstSciencePipeline/lsst_science_pipeline.py	14.54% <75.75%> (ø)