Removes unused function from javelin

Change-Id: Ic839187ec4d73065a9ebb37f4c4f809c1ff2e2d2
diff --git a/tempest/cmd/javelin.py b/tempest/cmd/javelin.py
index 504a9f1..5e7211e 100755
--- a/tempest/cmd/javelin.py
+++ b/tempest/cmd/javelin.py
@@ -232,9 +232,6 @@
         LOG.error("%s not found in USERS: %s" % (name, USERS))
 
 
-def resp_ok(response):
-    return 200 >= int(response['status']) < 300
-
 ###################
 #
 # TENANTS