Remove unused mocha

[birkskyum]

I don't see mocha used anywhere

Launch Checklist

• Briefly describe the changes in this PR.
• Link to related issues.
• Include before/after visuals or gifs if this PR includes visual changes.
• Write tests for all new functionality.
• Add an entry to CHANGELOG.md under the ## main section.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 62.65%. Comparing base (af01346) to head (0d1d8d5).
Report is 41 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1013      +/-   ##
==========================================
+ Coverage   59.84%   62.65%   +2.80%     
==========================================
  Files         104      104              
  Lines        3011     5770    +2759     
  Branches      680     1723    +1043     
==========================================
+ Hits         1802     3615    +1813     
- Misses       1209     2154     +945     
- Partials        0        1       +1     

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