Why do you want to exclude redirects from
Special:AllPages?
Partly because most of the user are getting confused if they see
the old
title also listed. They are not sure which one is now the official title
without clicking on the article link and then finding out looking at
redirects. Also for lot of them it is a personal preference.
Other users on your wiki might like having the
redirects on
Special:AllPages.
I have no issues that mediawiki maintains internal redirects. For example,
if somebody types in the old article link
http://myserver/wiki/index.php/Project_Blue it should still redirect to the
new title. All I want is that it should not be displayed when somebody
clicks on Special:AllPages. So basically do NOT display but still maintain
the redirection -- a cosmetic change.