docs: def remove_data_point(self, x, y):
          """Removes the given data point from the series.
  
          :param x: The numerical x value of the data point to be removed.
          :param y: The numerical y value of the data point to be removed.
          :raises ValueError: if you try to remove the last data point from\
          a series."""
  
          if len(self._data) == 1:
              raise ValueError("You cannot remove a Series' last data point")
          self._data.remove((x, y))