Unregisters the specified expiry. If the expiry is present in the
list of expired registrations being currently iterated over by
checkTimeouts, then it will be removed (its timeout method will not
be called). (This means that drop can be called from timeout
callbacks, unlike unregister.)
Unregisters the specified expiry. If the expiry is present in the list of expired registrations being currently iterated over by checkTimeouts, then it will be removed (its timeout method will not be called). (This means that drop can be called from timeout callbacks, unlike unregister.)