Revert "Fix #230: Add BiconnectivityAugmentation model"

[isPANN]

Reverts #640

[isPANN]

I'll open a new PR to resolve the issue directly.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.04%. Comparing base (dfcc313) to head (2962805).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #690   +/-   ##
=======================================
  Coverage   97.04%   97.04%           
=======================================
  Files         284      284           
  Lines       38037    38037           
=======================================
  Hits        36914    36914           
  Misses       1123     1123           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.