Blender Git Loki

Fix T76721: ASAN crash on animation rendering

Simple solution: remove the code which was causing bad threading
conflicts.

This code was a part of workaround for a specific state of linked
scene. It seems to be not needed anymore, since the pose is ensured
to be up to date by the following call stack:

- Dependency graph update,
- Copy-=on-write operation called on object.
- object_copy_data().
- BKE_pose_rebuild().

The workaround was a no-functional change for the dependency graph
anyway, because it was modifying original objects, not the ones
which are evaluated.