python/erase-pdf-wartermark-image.py: move clean_contents() after
python/erase-pdf-wartermark-image.py: move clean_contents() after

move page.clean_contents() after page.get_images() could fix the
problem that can not find some wartermark image in pages

Signed-off-by: Jianhong Yin <33106ae55a92c3aef6f38e024910da055a12fd9a@163.com>

tcler/argparse-getopt-examples,tcler/argparse-getopt-examples,tcler/argparse-getopt-examples,tcler/argparse-getopt-examples,tcler/argparse-getopt-examples