I mean its totally possible I'm completely seeing things....but in Webflow > style selector - if you have a duplicate class, and you simply just hit the delete key, Webflow automatically swaps to the non-duplicated version of that same class.....😱
So if there is a combo class, I copy that combo class, hit delete twice, paste and now I've cleaned up the duplicate class. Then I go to the style selector panel (G) and clean up any unused styles...