First I don't believe it will allow you to disable phone security if you have a payment system set-up on the device. I know awhile back this came up and the poster had to disable Google Pay in order to remove the password and make their device swipe to open. I would assume this would be true for Samsung Pay and any other similar payment system. Also the device cannot be encrypted. This is because the encryption key is the password, pin, pattern or fingerprint. Essentially
you will be taking all security away from your device by allowing it to be swipe to open. Just throwing that out there.
Meanwhile, there are settings that have to be changed in the Administrative Permissions to get the "none" option back. Here is a thread from another forum, I know we've covered it here at AC but I can't find it and I know for sure because I've provided this answer before, anyway, about half way down the OP of the thread figures it out and posts the step by step solution. Follow the G comments until you get to the one where it says Yay!
https://forums.tomsguide.com/thread...e-to-remove-password-to-unlock-screen.121653/
Post back if you have any further questions. Best wishes.