The dask-scheduler still starts the dashboard when "--no-dashboard" parameter is set.

version: `2022.5. 0`

Ran `dash-scheduler` with `--no-dashboard`, the following information is displayed:

```
Python-3.8]$ dask-scheduler --no-dashboard --no-show
2022-05-07 14:51:30,836 - distributed.scheduler - INFO - -----------------------------------------------
2022-05-07 14:51:30,840 - distributed.http.proxy - INFO - To route to workers diagnostics web server please install jupyter-server-proxy: python -m pip install jupyter-server-proxy
2022-05-07 14:51:30,844 - distributed.scheduler - INFO - State start
2022-05-07 14:51:30,850 - distributed.scheduler - INFO - -----------------------------------------------
2022-05-07 14:51:30,851 - distributed.scheduler - INFO - Clear task state
2022-05-07 14:51:30,852 - distributed.scheduler - INFO - Scheduler at: tcp://7.216.56.36:8786
2022-05-07 14:51:30,852 - distributed.scheduler - INFO - dashboard at: :8787
```

But dashboard port status is `LISTEN`:

```
Python-3.8]$ netstat -ano | grep 8787
tcp 0 0 0.0.0.0:8787 0.0.0.0:* LISTEN off (0.00/0/0)
tcp 0 0 7.216.56.36:8787 10.40.176.75:63536 ESTABLISHED off (0.00/0/0)
tcp 0 0 7.216.56.36:8787 10.40.176.75:63537 ESTABLISHED off (0.00/0/0)
tcp6 0 0 :::8787 :::* LISTEN off (0.00/0/0)
```

ps.

When running Distributed version 2.11.0, this dashboard port is not listened on, as expected.