Improve apphooks documentation (#6743)
Improve apphooks documentation (#6743)

Remove a reference to `urls` attribute on AppHook class in the documentation.
divio/django-cms,yakky/django-cms,rsalmaso/django-cms,rsalmaso/django-cms,yakky/django-cms,yakky/django-cms,rsalmaso/django-cms,divio/django-cms,rsalmaso/django-cms,datakortet/django-cms,yakky/django-cms,divio/django-cms,divio/django-cms,datakortet/django-cms,datakortet/django-cms,datakortet/django-cms