Revert "PSCSIStorageObject EVPD unit serial emulation"
Revert "PSCSIStorageObject EVPD unit serial emulation"

This reverts commit 70c41dd3437e0677ed769b9ee7b1855218266b1b.

* Reverted because the old behavior that allowed EVPD for pSCSI is now
  obsolete. Passing the wwn attribute to a PSCSI storage object would simply
  have no effect.

Datera/rtslib,Datera/rtslib,roidayan/rtslib,roidayan/rtslib