fully prune 'events_data' from codebase

[sappelhoff]

PR Description

remove deprecated param.

Merge checklist

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

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

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

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

```diff @@ 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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