Remove MATLAB leftovers

[dweindl]

Related to #2727.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.61%. Comparing base (d5492c3) to head (22ddcc8).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2961      +/-   ##
==========================================
- Coverage   77.29%   76.61%   -0.68%     
==========================================
  Files         307      307              
  Lines       19912    19912              
  Branches     1502     1502              
==========================================
- Hits        15391    15256     -135     
- Misses       4508     4643     +135     
  Partials       13       13              

Flag	Coverage Δ
cpp	72.77% <ø> (ø)
cpp_python	38.30% <ø> (ø)
petab	39.36% <ø> (ø)
python	70.33% <ø> (ø)
sbmlsuite-jax	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
python/sdist/amici/__init__.py	96.07% <ø> (ø)
python/sdist/amici/de_export.py	97.16% <ø> (ø)
python/sdist/amici/sbml_import.py	80.14% <ø> (-12.22%)	⬇️

... and 5 files with indirect coverage changes

🚀 New features to boost your workflow:

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