That arrow is a part of the default “Home Page” demo slideshow. To remove it simply edit that slideshow and delete that layer from Slide 2.
In your admin sidebar select Slider Revolution > Slider Revolution…
In the Revolution Sliders panel click the pencil icon for the “Home Page” slideshow to edit it…
Now, near the top of the screen, click on “Slide 2″ to edit that slide…
On the Slide 2 edit screen, scroll down the page, right-click on the arrow image and select Delete Layer from the menu…
Confirm that you want to delete the layer…
And, lastly, click on the green disk icon at top right to save the slide…
While you are at it you should replace our demo images with your own images. If you continue to link to resources on our demo server your IP address will automatically get flagged for excessive bandwidth usage and will be permanently blocked from accessing our server, and that will dramatically affect the speed at which your site loads.
If you need it, the Slider Revolution documentation is here → https://www.themepunch.com/revslider-doc/slider-revolution-documentation/
