refactor: remove EventFd::defuse() and EventFd::arm() #2452
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What does this PR do
Remove
EventFd::defuse()because it is a no-op,write(0)ing to an event fd does nothing. While in the documentation, it says:which means that this method should reset the kernel counter to 0, but it won't.
Remove
EventFd::arm()for symmetry reasons.Having
read()/write()is already sufficient for usage.Closes #2422
Checklist:
CONTRIBUTING.md