from matplotlib.figure import Figure
fig = Figure()
caption = fig.suptitle("test")
caption.remove()

Traceback (most recent call last):
  File "<pyshell#6>", line 1, in <module>
    caption.remove()
  File "C:\Programme\Python27\lib\site-packages\matplotlib\artist.py",
line 134, in remove
    raise NotImplementedError('cannot remove artist')
NotImplementedError: cannot remove artist