How to remove/define unused style.css style lines?

Question

css

The template has unused styles. Not all elements of the template are used on the site during installation.
Are there any program services that determine unused lines for cleaning

Answer 1

Try using the toaster search.
Is there a utility to remove unused css?

Answer 2

And what will you do when those same blocks appear on the site in the future? Look for how to return them back, but not all, but the blocks you need? You have 12kb of CSS code, you will get the most benefit by optimizing any image.
In addition, you do not know what class names are changed using js, or will change. The risk of breaking everything is too great.
Similar functionality is achieved with the correct configuration of the project builder, when unused styles are thrown out. CSS Modes.