* Remove volume calls from nova.db.api
* Remove volume calls from nova.db.sqlalchemy.api
* Remove tables from nova/db/sqlalchemy/models.py
* Remove Xen Storage Manager Volume Driver code
* No migration to preserve data in unused tables
* Remove quota support for volumes
DocImpact
part of bp delete-nova-volume
Change-Id: I2c82c96d67f3746e5de28f917dd8ceb0c8037e27