Blender Git Commit Log

Cleanup: get rid of `BKE_collection_copy`.

We want to get rid of those for all ID types ultimately, but that one
was only used in one place, being the only one calling
`BKE_collection_duplicate` without hierarchical duplicate and parent
collection pointer, effectively using the full power of the complex deep
duplication code for a mere `BKE_id_copy` call...

This will allow for further cleanup in duplicate code.