Turn off lock screen

[Guest]

I currently have a pin code lock screen set on my Galaxy S4. I want to turn it off, have followed the steps, but the "none" option is greyed out and won't let me choose it. How do I get around this and turn the lock screen off altogether? (honestly I just want the swipe screen lol)

 

[RadicalJenn]

https/youtu.be/FQ2cXsjtNEk