Extend pressure fn and remove unused examples

[vavrines]

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[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.01% 🎉

Comparison is base (18605e7) 87.16% compared to head (497c356) 87.17%.
Report is 8 commits behind head on main.

❗ Current head 497c356 differs from pull request most recent head d583077. Consider uploading reports for the commit d583077 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #96      +/-   ##
==========================================
+ Coverage   87.16%   87.17%   +0.01%     
==========================================
  Files          81       81              
  Lines        9294     9295       +1     
==========================================
+ Hits         8101     8103       +2     
+ Misses       1193     1192       -1     

Files Changed	Coverage Δ
src/Theory/theory_moments.jl	89.20% <100.00%> (+0.02%)	⬆️

... and 1 file with indirect coverage changes

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