If you want to remove keybindings you have to press the plus, next to the existing ones there should be a trash can icon, if you click it the keybindings will be deleted. But I don't know why you can't see them anymore.
This doesn't work for me, i delete the binding, i click accept then it either binds the left mouse button or the mouse axis as an input and there no other way around that hahaha.
In your screenshot there is not any assigned binding. All of them are unassigned. If any binding was assigned, you would see one button per assignment (left of the plus sign). Alternatively, you may have mods that have broken the user interface; if that was the case Safe Mode could help show you how things should look like without the broken mods.
Both are untrue in my case. here's a clip of safe mode with no key bindings showing when they have bindings
That seems buggy indeed, first time I ever see that behaviour. Can you please send a support report? https://supportid.beamng.com Also, check if you're using any of the programs that are so far known to create issues in our game https://documentation.beamng.com/support/troubleshooting/incompatible_software/
found what was causing this bug. it was a ssao mod I forgot I have that was causing a UI bug with the new update. the mod was updated and now everything is working as it should