Removed unused code from Dataset class

[schlunma]

Description

Removes code that is not relevant anymore because #2769 has been closed.

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Checklist

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.61%. Comparing base (2792ad1) to head (ef9d4d8).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2963      +/-   ##
==========================================
- Coverage   95.62%   95.61%   -0.01%     
==========================================
  Files         266      266              
  Lines       15601    15585      -16     
==========================================
- Hits        14918    14902      -16     
  Misses        683      683              

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[valeriupredoi]

thanks, Manu - @bouweandela I reckon this one's good to be merged 🍻

[schlunma]

I will merge this by the end of the week if there are no objections to proceed with the release process.