=== Background
Last year we added instrumented some logging on diffs (T326212). After pivoting to different projects we didn't end up needing this.
If this is not being used we should decommission the instrumentation again, since it's adding some minor technical maintenance workload for us (that being the mobile diff thanks instrumentation is broken).
=== AC/TODO
[x] Remove [[ https://codesearch.wmcloud.org/things/?q=specialDiff.click. | all code that logs specialDiff.click.* events ]]
[] Remove the `mediawiki.special_diff_interactions` stream configuration
[] Remove the `mediawiki.special_diff_interactions` `$wgEventLoggingStreamNames` entry
[x] Remove the event sanitisation allowlist entry, if necessary
[x] Request the deletion of any previously sanitised data, if necessary
=== Notes
1. It appears that the data was never sanitised so I've marked the relevant TODO entries as Done™
2. Re.
> [] Request the deletion of the `mediawiki_special_diff_interactions` table
Per T353366#9445335, the data are currently being analysed. Request the deletion of the table when the analysis is Done™.