3ff2733279
The recent refactor of sculpt mode drawing (d601bf7e) removed usage of
the update frustum planes. This makes storage of this data inside the
PBVH also unnecessary. If this feature needs to be reimplemented in the
future, the storage of the planes should be outside of the PBVH `struct`
Pull Request: https://projects.blender.org/blender/blender/pulls/129649