Blender Git Loki

Removing the old armature 'deform' settings (use vertex groups/envelopes/quats).

As far as I could tell, these were really only still used for "virtual
modifiers", though we really don't use these anymore. Instead, most of the time,
people need to set these settings in armature modifiers directly (these didn't
even get copied over in that case). This was a source of confusion and
redundancy, so removing these now.

This change can be reverted if these were actually of some use out there...