remove "support" for Remote_User variable, which never worked at all.

PR: 25725
Reviewed by: Justin Erenkrantz, Paul Querna


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@104736 13f79535-47bb-0310-9956-ffa450edef68