Remove wonky and unneeded code. We have access

cross forks, so child processes have access.

When we need true external access, this is something
that APR shm must provide. We should have no
knowledge of APR internals.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1561385 13f79535-47bb-0310-9956-ffa450edef68