How to remove unknown lock screen

Hey everyone, i'm using moto z play and from last i Don't know 2-3 months i'm getting this lock screen. I don't know how to remove it. Can anyone help me with it? Please. Thanks in advance. :)

Attached Images

• 101754.jpg (43.7 KB)

from Android Forums at AndroidCentral.com - Ask a Question http://ift.tt/2iOIWjd
via IFTTT