old_contents: from .find_contours import find_contours
  from ._regionprops import regionprops
  from .find_contours import find_contours
  from ._structural_similarity import ssim
  
new_contents: from .find_contours import find_contours
  from ._regionprops import regionprops
  from ._structural_similarity import ssim
  
subject: Remove double import of find contours.