[server/session] remove json dumps around call_service
This backouts changeset b151beea9cb6. With call_service being
in-process and synchronous, there's no RPC use case.
#! /bin/sh -e
#
if [ "$1" = configure ]; then
if which install-docs >/dev/null 2>&1; then
install-docs -i /usr/share/doc-base/cubicweb-doc
fi
fi
#DEBHELPER#
exit 0