How to get emacs20 removed from testing

[Nathanael Nerode <neroden@twcny.rr.com>]

I notice emacs20 has been trying to be removed for a while.
In order to make this work, you need to

remove eshell/2.4.2-6
remove w3-el/4.0pre.46-18
remove emacs20/20.7-13.1

W3-el and eshell are packages for emacs20 (only).  The packages serve no 
function with emacsen other than emacs20.  Eshell is now part of the core of 
emacs21, while there is a separate w3-el-e21 package for using w3-el in 
emacs21.