Remove old deprecated Token clients

TokenClientJSON and V3TokenClientJSON were deprecated
very long back so its time to remove them.

No one in OpenStack using those
- https://codesearch.opendev.org/?q=TokenClientJSON&i=nope&files=&excludeFiles=&repos=

Change-Id: If20fa58e64e130e268e1ad7999b0088a0a0c0f9c
diff --git a/releasenotes/notes/remove-deprecated-old-token-clients-e4c2e654132f1130.yaml b/releasenotes/notes/remove-deprecated-old-token-clients-e4c2e654132f1130.yaml
new file mode 100644
index 0000000..9acb873
--- /dev/null
+++ b/releasenotes/notes/remove-deprecated-old-token-clients-e4c2e654132f1130.yaml
@@ -0,0 +1,9 @@
+---
+prelude: >
+    Tempest's identity service client TokenClientJSON and V3TokenClientJSON
+    has been removed.
+upgrade:
+  - |
+    Tempest's identity service client TokenClientJSON and V3TokenClientJSON
+    were deprecated since long which are not removed. Please use new service
+    clients TokenClient and V3TokenClient instead.
diff --git a/tempest/lib/services/identity/v2/token_client.py b/tempest/lib/services/identity/v2/token_client.py
index 9f10f58..1191154 100644
--- a/tempest/lib/services/identity/v2/token_client.py
+++ b/tempest/lib/services/identity/v2/token_client.py
@@ -12,7 +12,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from oslo_log import log as logging
 from oslo_serialization import jsonutils as json
 
 from tempest.lib.common import rest_client
@@ -125,15 +124,3 @@
             return body['token']['id'], body
         else:
             return body['token']['id']
-
-
-class TokenClientJSON(TokenClient):
-    LOG = logging.getLogger(__name__)
-
-    def _warn(self):
-        self.LOG.warning("%s class was deprecated and renamed to %s",
-                         self.__class__.__name__, 'TokenClient')
-
-    def __init__(self, *args, **kwargs):
-        self._warn()
-        super(TokenClientJSON, self).__init__(*args, **kwargs)
diff --git a/tempest/lib/services/identity/v3/token_client.py b/tempest/lib/services/identity/v3/token_client.py
index 08a8f46..c63966a 100644
--- a/tempest/lib/services/identity/v3/token_client.py
+++ b/tempest/lib/services/identity/v3/token_client.py
@@ -12,7 +12,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from oslo_log import log as logging
 from oslo_serialization import jsonutils as json
 
 from tempest.lib.common import rest_client
@@ -195,15 +194,3 @@
             return token, body['token']
         else:
             return token
-
-
-class V3TokenClientJSON(V3TokenClient):
-    LOG = logging.getLogger(__name__)
-
-    def _warn(self):
-        self.LOG.warning("%s class was deprecated and renamed to %s",
-                         self.__class__.__name__, 'V3TokenClient')
-
-    def __init__(self, *args, **kwargs):
-        self._warn()
-        super(V3TokenClientJSON, self).__init__(*args, **kwargs)