Determine unused data in Power Bi

I have a whole bunch of data sources in a Power Bi dashboard I'm working on, some of which are kind of legacy, example:

Now I know that if I go to one of my tabs and click a random visual, that sidebar will display what data sources are used in the visual:

But my problem is:  I have 6 tabs and a whole bunch of visuals, and I'd rather not have to manually click on every single one to check if a data source is being used.

For instance I have a hunch sv_subject isn't being used.  Sure I could click through every tab and visual, or I could delete sv_subject and see if I break anything, but is there an easier way?