In the main view port I see these text but I dont know how to hide them ?
I googled alot
Me neither 
but I doubt there’s a button that toggles those info texts between visible and hidden since they’re meant to be seen while inspecting Nav Mesh
they were not there before
Ohh I think I now get what’s going on. You’re currently inspecting Nav Mesh, which you can do by pressing the P key. While inspecting Nav Mesh, those texts will appear along with the green surface. To stop inspecting it, all you need to do is just pressing P on your keyboard again 
(You need to press it while something in your scene is selected though, and not from the outliner window but rather the viewport)
lol thats cool