Remove ironic code from tree

This removes all of the ironic code from the devstack tree, in favor of
the devstack plugin in Ironic's tree.

Depends-On: I659e3de5c64df798441798ff48ba5c9c0506585a
Depends-On: I2c52bc014f1b0dbc6b0ae22a4deb4132b4c28621
Change-Id: I5125fce295c79600781469c2f48bea80e7600081
diff --git a/doc/source/plugin-registry.rst b/doc/source/plugin-registry.rst
index c68d926..7682def 100644
--- a/doc/source/plugin-registry.rst
+++ b/doc/source/plugin-registry.rst
@@ -30,6 +30,8 @@
 +------------------+---------------------------------------------+--------------------+
 |gnocchi           |git://git.openstack.org/openstack/gnocchi    | metric             |
 +------------------+---------------------------------------------+--------------------+
+|ironic            |git://git.openstack.org/openstack/ironic     | baremetal          |
++------------------+---------------------------------------------+--------------------+
 |magnum            |git://git.openstack.org/openstack/magnum     |                    |
 +------------------+---------------------------------------------+--------------------+
 |manila            |git://git.openstack.org/openstack/manila     | file shares        |