Delete unused css

Please give a quick overview of your product feature request or feedback and note who in your org is affected by this issue [ex. agents, admins, customers, etc.]. (2-3 sentences)

Check what css classes are not used (in css, scss, js etc) and delete from style.css

What problem do you see this solving? (1-2 sentences) 

Smaller file, faster loading

When was the last time you were affected by this lack of functionality, or specific tool? What happened? How often does this problem occur and how does this impact your business? (3-4 sentences)

all the time

Are you currently using a workaround to solve this problem? (If yes, please explain) (1-2 sentences)

no

What would be your ideal solution to this problem? How would it work or function? (1-2 sentences)

Check what css classes are not used (in css, scss, js etc) and delete from style.css