sys/event/timeout: remove alternative xtimer implementation #17689
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Contribution description
This PR removes the alternative xtimer implementation for
event_timeout
, its nowztimer_usec
based only. As shown in #17670 maintaining is simply not worth the effort.@kfessel also pointed out that all
event_timeout
users are alreadyztimer
users as well #17670 (comment).Testing procedure
Green CI will do
Issues/PRs references
Split from #17670