finally delete admin/ (redirect to /login.php)

We dropped admin/ in 2007 - if someone still didn't notice it, well, 
then I'm looking forward for a bugreport I can close as invalid ;-)


git-svn-id: https://svn.code.sf.net/p/postfixadmin/code/trunk@1657 a1433add-5e2c-0410-b055-b7f2511e0802

admin/index.php

@@ -1,4 +0,0 @@
-<?php
-header ("Location: ../login.php");
-exit(0);
-?>