BUG: Revert "OPTIM/MEDIUM: epoll: fuse active events into polled ones during polling changes"

This reverts commit 2f877304ef180654d165bf4ba8c88c204fc09d36.

This commit is OK for clear text traffic but causes trouble with SSL
when buffers are smaller than SSL buffers. Since the issue it addresses
will be gone once the polling redesign is complete, there's no reason
for trying to workaround temporary inefficiencies. Better remove it.