playbook: remove unused file

playbook/roles/upgrader/files/download-upgrader-playbook

-#!/bin/bash
-
-if [ ! -f /etc/opt/slapcache.cfg ]; then
-  slapcache-conf
-fi
-
-DFILE="/opt/upgrader/"
-TFILE="archive.tar.gz"
-
-mkdir -p $DFILE
-cd $DFILE
-
-/usr/local/bin/slapcache-download --destination=$TFILE
-tar -xzvf $TFILE
-
-md5sum $TFILE > "/opt/upgrader/next-upgrader-md5sum"