You could do this by setting up permissions on the project. You can deny the permission to 'View' data sources:
If you do so, the view will change from this:
This won't be ideal however, if users go into the 'Data Source' tab within the workbook will not be able to see details about it. From this:
I understand this is a change from prior versions which will take some adjustment to end users, but one advantage of seeing data sources listed there is that users can go into Ask Data quickly: Try Ask Data | Tableau Software. I'd also expect the UI to keep going into this direction of a unified interface for all types of content.
Hope this helps,
Thanks Santiago. we'll try.