fully prune 'events_data' from codebase

[sappelhoff]

PR Description

remove deprecated param.

Merge checklist

Maintainer, please confirm the following before merging.
If applicable:

• All comments are resolved
• This is not your own PR
• All CIs are happy
• PR title starts with [MRG]
• whats_new.rst is updated
• New contributors have been added to CITATION.cff
• PR description includes phrase "closes <#issue-number>"

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (87eea28) 97.61% compared to head (16d9c7a) 97.61%.
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1229      +/-   ##
==========================================
- Coverage   97.61%   97.61%   -0.01%     
==========================================
  Files          40       40              
  Lines        8685     8665      -20     
==========================================
- Hits         8478     8458      -20     
  Misses        207      207              

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[hoechenberger]

great!