Remove obsolete projects page from docs

The projects page unfortunately contains a lot of old projects, and some information there appears to be stale.

It was created at a time pytest was starting to be used, but seems pointless now as pytest is the most popular testing framework, so listing a few dozen projects which use it seems pointless.

Rather than updating it, I think we should remove it because this has the chance to become stale again soon, and not sure how valuable it is anyway.

Author: nicoddemus

doc/en/contents.rst

@@ -98,7 +98,6 @@ Further topics
    history
    historical-notes
    talks
-   projects
 
 
 .. only:: html