How do I reset my inputs or reset to default settings?

When i change one of my key inputs is it possible to change it to nothing or rest all of your keys to default?

Navigate to Program Files (x86)\Steam\SteamApps\common\rust\cfg (or C:\Program Files\Steam\SteamApps\common\rust\cfg if you’re running a 32 bit OS) and open client.cfg.
Then to remove a keybind, simply type None as the second option, example: input.bind Left A None

The defaults are:
input.bind Left A None
input.bind Right D None
input.bind Up W None
input.bind Down S None
input.bind Jump Space None
input.bind Duck LeftControl None
input.bind Sprint LeftShift None
input.bind Fire Mouse0 None
input.bind AltFire Mouse1 None
input.bind Reload R None
input.bind Use E None
input.bind Inventory Tab None
input.bind Flashlight F None
input.bind Laser G None
input.bind Voice V None
input.bind Chat T Return

Edit: Or just open the ingame options, click the one you want to remove, and press the escape key.