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 62.06%. Comparing base (f97d405) to head (6389317).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #177      +/-   ##
===========================================
+ Coverage    61.95%   62.06%   +0.10%     
===========================================
  Files          303      302       -1     
  Lines        11673    11650      -23     
  Branches      1046     1045       -1     
===========================================
- Hits          7232     7230       -2     
+ Misses        4441     4420      -21     

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