Creating a new subplot with a position which is entirely inside a
       pre-existing axes will trigger the larger axes to be deleted::

          import matplotlib.pyplot as plt
          # plot a line, implicitly creating a subplot(111)
          plt.plot([1,2,3])
          # now create a subplot which represents the top plot of a grid
          # with 2 rows and 1 column. Since this subplot will overlap the
          # first, the plot (and its axes) previously created, will be removed
          plt.subplot(211)
          plt.plot(range(12))
          plt.subplot(212, facecolor='y') # creates 2nd subplot with yellow background

       If you do not want this behavior, use the
       :meth:`~matplotlib.figure.Figure.add_subplot` method or the
       :func:`~matplotlib.pyplot.axes` function instead.

    for other in fig.axes:
        if other==a: continue
        if bbox.fully_overlaps(other.bbox): # <-- here
            byebye.append(other)
    for ax in byebye: delaxes(ax)