Don't configure ssh if it isn't installed

src/freedombone-image-customise

 }
 
 configure_ssh() {
+    if [[ $VARIANT == "mesh" || $VARIANT == "meshclient" || $VARIANT != "meshusb" ]]; then
+        return
+    fi
+
     sed -i "s/Port .*/Port ${SSH_PORT}/g" $rootdir/etc/ssh/sshd_config
 
     if [[ "$SSH_PUBKEY" != "no" ]]; then