Use-case: I have an app with many screens and tons of CSS classes defined in the style sheet; I decide I no longer need one or more screens, so I delete it/them; now, I have a bunch of CSS classes defined in the style sheet that are no longer used anywhere in the app.

Problem: I don't want unused CCS classes in the style sheet, so now I'm forced to search for each class in the app to check if it's used or not before safely deleting its definition.

Solution: there should be an easy way to "Removed All Unused CSS Definitions", just like there's a "Remove unused elements" (see image), and/or a visual cue on the Style Sheet, next to each unused CSS definition, to make it easy for thee developer to see that that particular definition is not being used (that way the developer can manually delete only the ones they're sure they'll never use again).