Remove a redundant 'body' variable

Change-Id: I242c3db36d5d1909edfe7dcf6d3dc0ef47331e8f
diff --git a/tempest/api/volume/admin/test_volume_types.py b/tempest/api/volume/admin/test_volume_types.py
index 3d44bbe..16be463 100644
--- a/tempest/api/volume/admin/test_volume_types.py
+++ b/tempest/api/volume/admin/test_volume_types.py
@@ -84,7 +84,6 @@
     @test.idempotent_id('4e955c3b-49db-4515-9590-0c99f8e471ad')
     def test_volume_type_create_get_delete(self):
         # Create/get volume type.
-        body = {}
         name = data_utils.rand_name(self.__class__.__name__ + '-volume-type')
         description = data_utils.rand_name("volume-type-description")
         proto = CONF.volume.storage_protocol