In all blizzard games, I saw a number on top left of the screen. That happens only on blizzard games.

[![enter image description here](https://i.stack.imgur.com/ZAzqJ.jpg)](https://i.stack.imgur.com/ZAzqJ.jpg)
[![enter image description here](https://i.stack.imgur.com/mOBT1.jpg)](https://i.stack.imgur.com/mOBT1.jpg)

I think I must have set that up before because I want to know fps. Now I have a fast computer and the fps is locked at 60 anyway, I want to undo it. I have no idea how.