Updated openstack/openstack
Project: openstack/oslo.messaging  8a4f9ad8c9e18ac5bf5f6c7b6f9f687d4cc6a3ad
null
Remove old drivers dead code

This patch removes some common helper method/class.
Because they are not used anymore by current amqpdriver.

Change-Id: I183750e158e05cf1d0b5e37725676d4882e0c043