Feature/cleanup

[danovaro]

Description

removed deprecated features (ExpandCallback, DummyContext)

Contributor Declaration

By opening this pull request, I affirm the following:

• All authors agree to the Contributor License Agreement.
• The code follows the project's coding standards.
• I have performed self-review and added comments where needed.
• I have added or updated tests to verify that my changes are effective and functional.
• I have run all existing tests and confirmed they pass.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 61.58%. Comparing base (3ce07cd) to head (d9add7f).
⚠️ Report is 4 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #177      +/-   ##
===========================================
+ Coverage    61.49%   61.58%   +0.09%     
===========================================
  Files          310      309       -1     
  Lines        11843    11822      -21     
  Branches      1040     1039       -1     
===========================================
- Hits          7283     7281       -2     
+ Misses        4560     4541      -19     

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