remove printing password to logs

when people show a jupyterlab space to others or copy-paste the container logs somewhere, it's better if the password is not printed in plain text

start_server.sh

@@ -1,8 +1,6 @@
 #!/bin/bash
 JUPYTER_TOKEN="${JUPYTER_TOKEN:=huggingface}"
 
-echo "Starting Jupyter Lab with token $JUPYTER_TOKEN"
-
 NOTEBOOK_DIR="/data"
 
 jupyter-lab \