Incoming string attributes from USD have never been fully processed yet
they were added to our list of convertible types. This list originally
came from the Mesh reader before it was made common, but for Meshes the
string type was being skipped elsewhere so there was no harm. Now that
Point Clouds and Curves use this common code, it does matter.
Files containing string attributes for these object types will hit the
`BLI_assert_unreachable` call inside `copy_primvar_to_blender_attribute`
and trace an error to the console requesting the user to file bugs. This
was discovered while looking into the old Moana scene.
Remove the string entry for now as there's no regression in behavior and
it prevents the assert from firing (functionally harmless in Release
builds but the output to the terminal is unnecessary).
Pull Request: https://projects.blender.org/blender/blender/pulls/140681
5c25a24528