devel-docs/index.rst - Remove boilerplate at the end that we don't use
devel-docs/index.rst - Remove boilerplate at the end that we don't use

Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/735>

GNOME/librsvg,GNOME/librsvg,GNOME/librsvg,GNOME/librsvg