How to unbind inputmapped controls.

/// <summary>
        /// Undoes any previous call to BindCommand, BindAction, and/or BindMove for
        /// the passed combination of deviceNumber, objectId, and modifier.
        /// </summary>
        /// <param name="deviceNumber">e.g. InputManager.Instance.FindDevice("keyboard")</param>
        /// <param name="objectId">e.g. (int)Keys.S</param>
        /// <param name="modifier">e.g. TorqueInputDevice.Action.Shift</param>
        /// <returns>Whether deviceNumber and objectId are valid.</returns>
        public bool UnbindInput(int deviceNumber, int objectId, TorqueInputDevice.Action modifier)
        {
            TorqueInputDevice device = InputManager.Instance.GetDevice(deviceNumber);
            if (device == null || !device.IsValidObject(objectId))
                return false;

            int index = _FindInputNode(deviceNumber, objectId, modifier);
            if (index < 0)
                return true; //no binding, yet, for that combination

            InputNode node = _inputNodes[index];

            node.Flags = InputNode.ActionFlags.None;
            node.MakeDelegate = null;
            node.BreakDelegate = null;
            node.ActionDelegate = null;
            node.Modifier = TorqueInputDevice.Action.None;
            node.MoveIndex = -1;

            _inputNodes[index] = node;

            return true;
        }

        #region UnbindInput variants for convenience

        /// <summary>
        /// Undoes any previous call to BindCommand, BindAction, and/or BindMove for
        /// the passed combination of deviceName, objectName, and modifier.
        /// </summary>
        /// <param name="deviceName">e.g. "keyboard"</param>
        /// <param name="objectName">e.g. "S"</param>
        /// <param name="modifier">e.g. TorqueInputDevice.Action.Shift</param>
        /// <returns>Whether deviceNumber and objectId are valid.</returns>
        public bool UnbindInput(String deviceName, String objectName, TorqueInputDevice.Action modifier)
        {
            int deviceNumber = InputManager.Instance.FindDevice(deviceName);
            if (deviceNumber == -1)
                return false;

            TorqueInputDevice device = InputManager.Instance.GetDevice(deviceNumber);
            int objectId = device.GetObjectId(objectName);
            if (objectId == -1)
                return false;

            return UnbindInput(deviceNumber, objectId, modifier);
        }

        /// <summary>
        /// Undoes any previous call to BindCommand, BindAction, and/or BindMove for
        /// the passed combination of deviceName and objectName.
        /// </summary>
        /// <param name="deviceName">e.g. "keyboard"</param>
        /// <param name="objectName">e.g. "S"</param>
        /// <returns>Whether deviceNumber and objectId are valid.</returns>
        public bool UnbindInput(String deviceName, String objectName)
        {
            return UnbindInput(deviceName, objectName, TorqueInputDevice.Action.None);
        }

        /// <summary>
        /// Undoes any previous call to BindCommand, BindAction, and/or BindMove for
        /// the passed combination of deviceNumber and objectId.
        /// </summary>
        /// <param name="deviceNumber">e.g. InputManager.Instance.FindDevice("keyboard")</param>
        /// <param name="objectId">e.g. (int)Keys.S</param>
        /// <returns>Whether deviceNumber and objectId are valid.</returns>
        public bool UnbindInput(int deviceNumber, int objectId)
        {
            return UnbindInput(deviceNumber, objectId, TorqueInputDevice.Action.None);
        }

        #endregion