Removed the "not_full" condition variable and associated conditional

logic from the file descriptor queue, now that we can rely on the
idle worker reference count to keep the listener from trying to
push connections into a full queue
Reviewed by:	Aaron Bannert (concept)


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@94845 13f79535-47bb-0310-9956-ffa450edef68