Bug#905440: www.debian.org: remove "last modified" from footer

[Thomas Lange <lange@informatik.uni-koeln.de>]

Package: www.debian.org

In the footer of every page we list the date the page was last
modified. Currently this information is completly useless, because it
does not show a correct date. e.g.

https://www.debian.org/women/
Last Modified: Fri, Jun 1 18:42:17 UTC 2018 

Let's look into the git log:

The last commit on index.wml was in 2014, which only changed http to
https, so no real content change. In fact, the content didn't changed
since 2012 and may be out of date.

Please just remove this useless information from every page.

-- 
regards Thomas