The CopySkinnedModelData() function is no longer referenced by any code in the Engine as of 4.19. The function should either be marked as deprecated or removed from the Engine.
RESULT:
The CopySkinnedModelData() function is not referenced anywhere else in the Engine source code.
EXPECTED:
The CopySkinnedModelData() function is either marked as deprecated, or removed entirely.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-57623 in the post.