update.sh: Do not exit GUI cause the command fails

playbook/update.sh

@@ -5,8 +5,6 @@ GIT_URL="https://git.banananet.work/zocker/imageviewer.git"
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )";
 source "$DIR/_common.sh";
 
-echo "Beende grafische Benutzeroberfläche ...";
-systemctl stop lightdm;
 echo "Lade Updates herunter ..."
 dir="$(mktemp -d)";
 if ! git clone --depth 1 "$GIT_URL" "$dir"; then