cubicweb #2423532 Changelog view is not maintained, remove it [done]

the user-oriented Changelog_* are not maintained, last change says it's 2010. This reflects badly on all cubicweb powered websites.

I recommend removing it.

prioritynormal
typebug
done in3.16.0
load0.100
load left0.000
closed by#97202ea671e4 [web/test] fix stale reference to the changelog view (closes #2423532), #fa044b9157d7 Remove changelog view (closes #2423532)