Removing lpn_interface.cpp

[aabrown100-git]

Current situation

#466

Release Notes

• Deletes lpn_interface.cpp

Documentation

No documentation necessary.

Testing

Existing sv0D tests still pass.

Code of Conduct & Contributing Guidelines

• I agree to follow the Code of Conduct and Contributing Guidelines.

[Copilot]

Pull Request Overview

This PR removes the entire lpn_interface.cpp file, which provided the C interface layer between Fortran code and the C++ LPNSolverInterface for 0D lumped parameter network (LPN) simulations. The file contained approximately 218 lines implementing various interface functions for model initialization, state management, parameter updates, and simulation execution.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.35%. Comparing base (4db1403) to head (5e28d3c).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #467   +/-   ##
=======================================
  Coverage   67.35%   67.35%           
=======================================
  Files         169      169           
  Lines       32620    32620           
  Branches     5718     5718           
=======================================
  Hits        21970    21970           
  Misses      10513    10513           
  Partials      137      137           

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