Function unbindGamepad

unbindGamepad(index, button): void
unbind the defined keycode
Parameters
- index: number
  Gamepad index
- button: number
  (See input.GAMEPAD)
Returns void
Example
```
me.input.unbindGamepad(0, me.input.GAMEPAD.BUTTONS.FACE_1);
```
- Defined in packages/melonjs/src/input/gamepad.js:451