How can I hide the # column in a Config array?

Summary:

How can I hide the # column in an Array?

Content (please ensure you mask any confidential information):

I would like to hide the entire # column in a Config array.

I assume it should be done with CSS, but haven't been able to find a selector to hide the column.

Version (include the version you are using, if applicable):

24B

Code Snippet (add any code snippets that support your topic, if applicable):