Update start-jupyter

start-jupyter

@@ -354,7 +354,6 @@ function main () {
     trap clean_up INT QUIT TERM ERR EXIT
 
     echo "Establishing ssh master connection."
-    set -x
     # Set up control master for connection sharing
     mkdir -p "${HOME}/.ssh"
     ssh_socket_dir="$(mktemp -d "${HOME}/.ssh/socket.XXXXX")"