Remove 'deactivate_image' config options

'deactivate_image' config option was added long
back in kilo cycle and has been deprecated for
removal.
- I584cd40a9b5f297537333336b1b9a46ccf1ddc67

This commit removes it from tempest.

Change-Id: I843d4c64f24407d9d217005d5ea59d50d7ad62e7
diff --git a/releasenotes/notes/removal-deprecated-config-options-3db535b979fe3509.yaml b/releasenotes/notes/removal-deprecated-config-options-3db535b979fe3509.yaml
index dbb6c46..2b3bb3a 100644
--- a/releasenotes/notes/removal-deprecated-config-options-3db535b979fe3509.yaml
+++ b/releasenotes/notes/removal-deprecated-config-options-3db535b979fe3509.yaml
@@ -6,3 +6,4 @@
     good to handle them.
 
     * ``[identity-feature-enabled].forbid_global_implied_dsr``
+    * ``[image-feature-enabled].deactivate_image``
diff --git a/tempest/api/image/v2/test_images.py b/tempest/api/image/v2/test_images.py
index c846f88..ce5bd3e 100644
--- a/tempest/api/image/v2/test_images.py
+++ b/tempest/api/image/v2/test_images.py
@@ -18,8 +18,6 @@
 
 import six
 
-import testtools
-
 from oslo_log import log as logging
 from tempest.api.image import base
 from tempest import config
@@ -128,8 +126,6 @@
         self.assertEqual(image['id'], body['id'])
         self.assertEqual(new_image_name, body['name'])
 
-    @testtools.skipUnless(CONF.image_feature_enabled.deactivate_image,
-                          'deactivate-image is not available.')
     @decorators.idempotent_id('951ebe01-969f-4ea9-9898-8a3f1f442ab0')
     def test_deactivate_reactivate_image(self):
         # Create image
diff --git a/tempest/config.py b/tempest/config.py
index 19ac2fc..ff9bf1b 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -537,13 +537,6 @@
                                   'are current one. In future, Tempest will '
                                   'test v2 APIs only so this config option '
                                   'will be removed.'),
-    cfg.BoolOpt('deactivate_image',
-                default=False,
-                help="Is the deactivate-image feature enabled."
-                     " The feature has been integrated since Kilo.",
-                deprecated_for_removal=True,
-                deprecated_reason="All supported versions of OpenStack now "
-                                  "support the 'deactivate_image' feature"),
 ]
 
 network_group = cfg.OptGroup(name='network',