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Where is a "Dancing Script" font loaded?

https://fonts.googleapis.com/css?family=Open+Sans:400,800,300,700
https://fonts.googleapis.com/css?family=Dancing+Script
https://fonts.googleapis.com/css?family=Raleway:400,600,900

Those fonts above might be included with some old sliders provided in Blaszok package.

Related CSS code can be found in Slider Revolution->Slide Editor->Slider Custom CSS/JS Editor-> Edit Depricated Global Styles

The best approch is to remove fonts @import and copy rest of those styles into Slider CSS field.
For removing Depricated Global Styles use "Empty Global Styles" button. 

https://www.themepunch.com/faq/remove-deprecated-global-css/