Remove "PATH_INFO Changes in CGI Environment" documentation.

Reason: It's outdated and wrong. For 7 years and 3 months.
The behaviour was changed back during Apache 1.2 (!) development.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@104662 13f79535-47bb-0310-9956-ffa450edef68