Revert "clear zombies after they are removed from timer list"
Revert "clear zombies after they are removed from timer list"

This reverts commit 308d27fba61e0487d246ed8117c6dc667270f4f9.

trevorbernard/jeromq,c-rack/jeromq,trevorbernard/jeromq,fredoboulo/jeromq,zeromq/jeromq,zeromq/jeromq,fredoboulo/jeromq