[ext] Remove use of cStringIO
We create a StringIO never to read anything from it. Docutils seems to
support setting the 'warning_stream' to False to ignore warnings. So
let's just do that.
#! /bin/sh -e
if [ -x "/etc/init.d/cubicweb-ctl" ]; then
invoke-rc.d cubicweb-ctl restart || true
fi
#DEBHELPER#
exit 0