From Discord: https://discord.com/channels/1059825704402952272/1277337423608680528/1334906682492452914

There is no way to remove this windows, kinda like it is missing an X up right corner. Same goes for when pressing suggested airports to see more info. Only when you press "scenery" it will have an x on the window as shown in the screenshots to the right. Only way to remove the info window in image left, is to click "hide" and "show" again

I've looked at this twice, and it's not the easiest task as everything is nested together in the code in a special way that's a bit cumbersome to solve. I haven't spent much more time on this as it's not urgent in any way.