[book] remove broken links to web.views.wdoc.ChangeLog{View,Action}
ChangeLogView and ChangeLogAction were removed in 3.16.0 (changeset
fa044b9157d7, https://www.cubicweb.org/2423532)
Closes #3369687
# -*- coding: utf-8 -*-
# copyright %(year)s %(author)s, all rights reserved.
# contact %(author-web-site)s -- mailto:%(author-email)s
#
%(long-license)s
"""%(distname)s entity's classes"""