Cleanup ap_get_client_block a bit. All of the code that I am removing

doesn't actually do anything useful, it was meant to remove all zero
length buckets before trying to read from the brigade.  However, it is
perfectly fine to not do this, and to just read those buckets along with
the rest of them.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@86589 13f79535-47bb-0310-9956-ffa450edef68