chore: drop remaining files from webpack / jest

[susnux]

📝 Summary

files seem to be unused

🏁 Checklist

• Code is properly formatted (npm run lint / npm run stylelint / composer run cs:check)
• Sign-off message is added to all commits
• Tests (unit, integration and/or end-to-end) passing and the changes are covered with tests
• Documentation (README or documentation) has been updated or is not required

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.86%. Comparing base (06099c2) to head (e935e6e).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7072      +/-   ##
==========================================
+ Coverage   51.85%   51.86%   +0.01%     
==========================================
  Files         478      477       -1     
  Lines       40671    40658      -13     
  Branches      989      988       -1     
==========================================
  Hits        21089    21089              
+ Misses      19476    19464      -12     
+ Partials      106      105       -1     

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[max-nextcloud]

/backport to stable31