docs: Remove a whole load of unused images, most remainder

Thank God. The majority of the removed images are so crufty, it's
actually funny. I don't want to update them and it's unlikely anyone
else does either. The rest are just moved to be with their comrades in
the '_static/images' directory.

Change-Id: I91b34c85379a68be5e6a09ce48b11c0d3343f12b
Signed-off-by: Stephen Finucane <sfinucan@redhat.com>

doc/source/admin/configuration/hypervisor-vmware.rst

@@ -31,7 +31,7 @@ architecture:
 
 .. rubric:: VMware driver architecture
 
-.. figure:: /figures/vmware-nova-driver-architecture.jpg
+.. figure:: /_static/images/vmware-nova-driver-architecture.jpg
    :width: 100%
 
 As the figure shows, the OpenStack Compute Scheduler sees three hypervisors

doc/source/admin/configuration/hypervisor-xen-api.rst

@@ -123,7 +123,7 @@ XenAPI deployment architecture
 A basic OpenStack deployment on a XAPI-managed server, assuming that the
 network provider is neutron network, looks like this:
 
-.. figure:: /figures/xenserver_architecture.png
+.. figure:: /_static/images/xenserver_architecture.png
    :width: 100%
 
 Key things to note:

doc/source/admin/configuration/schedulers.rst

@@ -125,7 +125,7 @@ request, described in the :ref:`weights` section.
 
 **Filtering**
 
-.. figure:: /figures/filteringWorkflow1.png
+.. figure:: /_static/images/filtering-workflow-1.png
 
 The ``available_filters`` configuration option in ``nova.conf``
 provides the Compute service with the list of the filters that are available
@@ -785,7 +785,7 @@ weight is given the highest priority.
 
 **Weighting hosts**
 
-.. figure:: /figures/nova-weighting-hosts.png
+.. figure:: /_static/images/nova-weighting-hosts.png
 
 Hosts are weighted based on the following options in the
 ``/etc/nova/nova.conf`` file:

doc/source/reference/update-provider-tree.rst

@@ -233,6 +233,6 @@ There are various types of traits:
 This diagram may shed further light on how these traits relate to each
 other and how they are managed.
 
-.. figure:: /figures/traits-taxonomy.svg
+.. figure:: /_static/images/traits-taxonomy.svg
    :width: 800
    :alt: Venn diagram showing taxonomy of traits and capabilities