How to remove the duplicate rules?

Hello, there is a css file and weighs 2MB (MGM...)
people did each css for each individual page, and then unite it all in 1 file and there is a lot of repetitions..

How to remove the most of repetition, not to sit and all these lines are not deleted manually...

Please tell me
June 14th 19 at 18:51
1 answer
June 14th 19 at 18:53
thank you very much) - Carli.Harr commented on June 14th 19 at 18:56

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