Remove deprecated 'project usage list' command

Remove the 'project usage list' command that was deprecated in version
1.0.2 in review Ie08d4f88d71a660fca1862405351109cd0aa86b6.

Note that the removed command class is a good example of how to wrap a
command and show a deprecation message.

Change-Id: I6c750730963615895f5d9953487d2d5a905885a8

Author: Dean Troyer

openstackclient/compute/v2/usage.py

@@ -196,20 +196,3 @@ def take_action(self, parsed_args):
             float("%.2f" % usage.total_local_gb_usage)
             if hasattr(usage, "total_local_gb_usage") else None)
         return zip(*sorted(six.iteritems(info)))
-
-
-# This is out of order due to the subclass, will eventually be removed
-
-class ListProjectUsage(ListUsage):
-    """List resource usage per project"""
-
-    deprecated = True
-
-    log = logging.getLogger('DEPRECATED:')
-
-    def take_action(self, parsed_args):
-        self.log.warning(
-            "%s is deprecated, use 'usage list'",
-            getattr(self, 'cmd_name', 'this command'),
-        )
-        return super(ListProjectUsage, self).take_action(parsed_args)

setup.cfg

@@ -104,8 +104,6 @@ openstack.compute.v2 =
     keypair_list = openstackclient.compute.v2.keypair:ListKeypair
     keypair_show = openstackclient.compute.v2.keypair:ShowKeypair
 
-    project_usage_list = openstackclient.compute.v2.usage:ListProjectUsage
-
     security_group_create = openstackclient.compute.v2.security_group:CreateSecurityGroup
     security_group_delete = openstackclient.compute.v2.security_group:DeleteSecurityGroup
     security_group_list = openstackclient.compute.v2.security_group:ListSecurityGroup