remove "Busiprof With Responsive Design" etc

Goodmorning,
how can I remove all the black stripe where there is written ” Busiprof With Responsive Design, We are a group of passionate designers and developers who really love to create awesome wordpress themes with amazing support and ….”

I tried using ” .row-fluid slider {display:none} ” in custom css box but it doesn’t work.

Thank you very much,
Giandonato