Remove unnecessary line of code

Change-Id: Iaf68a7550f7557bd5e941b619cc2012ca27b38d6
diff --git a/tempest/lib/common/utils/data_utils.py b/tempest/lib/common/utils/data_utils.py
index 438d73e..3483c51 100644
--- a/tempest/lib/common/utils/data_utils.py
+++ b/tempest/lib/common/utils/data_utils.py
@@ -50,8 +50,7 @@
              (e.g. 'prefixfoo-namebar-154876201')
     :rtype: string
     """
-    randbits = str(random.randint(1, 0x7fffffff))
-    rand_name = randbits
+    rand_name = str(random.randint(1, 0x7fffffff))
     if name:
         rand_name = name + '-' + rand_name
     if prefix: