Remove service restart delay during upgrade

install/upgrade/restart.sh

@@ -15,7 +15,6 @@ for user in `ls /usr/local/hestia/data/users/`; do
 done
 
 echo "(*) Restarting services..."
-sleep 3
 if [ ! -z $MAIL_SYSTEM ]; then
     $BIN/v-restart-mail $restart
 fi