Fixed some leftover amici depractions.

[PaulJonasJost]

Seems to have missed some last time.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 60.00000% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 84.26%. Comparing base (8016726) to head (9318c0b).

Files	Patch %	Lines
pypesto/objective/amici/amici.py	0.00%	1 Missing ⚠️
pypesto/objective/amici/amici_calculator.py	66.66%	1 Missing ⚠️

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Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1344      +/-   ##
===========================================
- Coverage    84.28%   84.26%   -0.03%     
===========================================
  Files          152      152              
  Lines        12441    12441              
===========================================
- Hits         10486    10483       -3     
- Misses        1955     1958       +3     

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