Waterfall chart with watermark

Hey Community, I´m having travel with the view of my waterfall chart, it has a watermark that says "https:\dataviz.boutique/", and I would rather prefer to take it off because it´s for a work presentation. I don´t know if there are any options out there to avoid displaying these watermark when using the type of chart. 

Sending the following screenshot: 

Thanks For Helping, 

Stefano