Remove unnecessary __init__()

__init__()s of images_client are meaningless, because of just passing
the same arguments. So this patch removes them.

Change-Id: I45b7d176defd2de4bbf5bc503533162c16fe0a68
diff --git a/tempest/services/image/v1/json/images_client.py b/tempest/services/image/v1/json/images_client.py
index 922b626..b45ca22 100644
--- a/tempest/services/image/v1/json/images_client.py
+++ b/tempest/services/image/v1/json/images_client.py
@@ -32,10 +32,6 @@
 
 class ImagesClient(rest_client.RestClient):
 
-    def __init__(self, auth_provider, catalog_type, region, **kwargs):
-        super(ImagesClient, self).__init__(
-            auth_provider, catalog_type, region, **kwargs)
-
     def _image_meta_from_headers(self, headers):
         meta = {'properties': {}}
         for key, value in six.iteritems(headers):
diff --git a/tempest/services/image/v2/json/images_client.py b/tempest/services/image/v2/json/images_client.py
index 88eafe1..83f56cc 100644
--- a/tempest/services/image/v2/json/images_client.py
+++ b/tempest/services/image/v2/json/images_client.py
@@ -26,10 +26,6 @@
 
 class ImagesClient(rest_client.RestClient):
 
-    def __init__(self, auth_provider, catalog_type, region, **kwargs):
-        super(ImagesClient, self).__init__(
-            auth_provider, catalog_type, region, **kwargs)
-
     def update_image(self, image_id, patch):
         """Update an image.