Revert "enforce_unique_orbit_embedding() : when some cells have been duplicated the "duplicated_cells_counter" attribute is not removed in order to find duplicated cells."
Revert "enforce_unique_orbit_embedding() : when some cells have been duplicated the "duplicated_cells_counter" attribute is not removed in order to find duplicated cells."

This reverts commit d488e0528ee26c175c4a9bb1089bebc2394f9a67.

cgogn/CGoGN_2,david-cazier/CGoGN_2,untereiner/CGoGN_2,david-cazier/CGoGN_2,untereiner/CGoGN_2,cgogn/CGoGN_2,etienneschmitt/CGoGN_2