Remove unnecessary wait-for-volume-available

There is already wait_for_volume_status 'available' in
base.create_volume, so the caller need not duplicate the
wait procedure.

Change-Id: Iecc9eda77ba6e6b5fc7fb3bd0470efe99b343385
diff --git a/tempest/api/volume/test_volumes_actions.py b/tempest/api/volume/test_volumes_actions.py
index b80a4a4..3ac11fc 100644
--- a/tempest/api/volume/test_volumes_actions.py
+++ b/tempest/api/volume/test_volumes_actions.py
@@ -48,8 +48,6 @@
 
         # Create a test shared volume for attach/detach tests
         cls.volume = cls.create_volume()
-        waiters.wait_for_volume_status(cls.client,
-                                       cls.volume['id'], 'available')
 
     @test.idempotent_id('fff42874-7db5-4487-a8e1-ddda5fb5288d')
     @test.stresstest(class_setup_per='process')