code: def reset_layer(self, layer):
          
          if self._frozen:
              raise TypeError('Frozen ConfigNode does not support modification')
          if layer in self._values:
              del self._values[layer]
docs: Removes any value and metadata associated with the named layer.
  
          Parameters
          ----------
          layer : str
              Name of the layer to reset.
  
          Raises
          ------
          TypeError
              If the node is frozen
          KeyError
              If the named layer does not exist