rewrite guide: remove deprecated stub pages (access, advanced, proxy)

rewrite guide: remove deprecated stub pages (access, advanced, proxy)

These pages were replaced by reorganized content in avoid.xml,
remapping.xml, rewritemap.xml, and flags.xml during the redundancy
cleanup. Each stub contained only a deprecation notice with pointers
to the new locations, and no other page in the guide links to them.

Removes 54 files (English sources, translations, built HTML, meta).

We will *not* be deleting these in 2.4 but some day when 2.6 branches,
they'll get dropped. The versions in 2.4 are already marked as
deprecated, with a "will go away in the future" message, so by that
time, this should take care of itself.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1934199 13f79535-47bb-0310-9956-ffa450edef68