I prefer Gravity Forms over Contact Form 7. CF7 is shown as a "required" plugin. I would prefer not to use it. Does anything break if I don't use CF7?
Also, why are Royal Slider, Revolution Slider, and Mailchimp lite listed as "required"?
Contact Form 7 is not required, and Royal Slider and Revolution also not required but we recommended install it for Demo import. All plugins except levelup-core, is not required, and you no need install them, if you don't use.