Remove the byterange code out of mod_file_cache's handler. That

is completely in the core now.

Note that file handle caching is broken (nothing to do with
byte ranges).  mmap caches seem to work o.k.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@86873 13f79535-47bb-0310-9956-ffa450edef68