ENH: Remove GeodesicActiveContourImageFilter.py example

The example was updated and moved to the ITK examples repo.
http://review.source.kitware.com/#/c/15978/

ITK-3264

Change-Id: If9758d1a1a9b06972a8c8e804a299d1d555bebe1
Merge topic 'RemoveGeodesicPython'

a49b850a ENH: Remove GeodesicActiveContourImageFilter.py example