Index: lnt/trunk/lnt/server/ui/util.py
===================================================================
--- lnt/trunk/lnt/server/ui/util.py
+++ lnt/trunk/lnt/server/ui/util.py
@@ -12,13 +12,6 @@
     return "#%02x%02x%02x" % (r, g, b)
 
 
-def safediv(a, b, default=None):
-    try:
-        return a / b
-    except ZeroDivisionError:
-        return default
-
-
 def makeDarkerColor(h):
     return makeDarkColor(h, 0.50)
 
Index: lnt/trunk/lnt/server/ui/views.py
===================================================================
--- lnt/trunk/lnt/server/ui/views.py
+++ lnt/trunk/lnt/server/ui/views.py
@@ -1771,9 +1771,6 @@
             req.samples[s[1]].append(s[0])
             all_orders.add(s[1])
             order_to_id[s[1]] = s[2]
-        req.derive_stat = {}
-        for order, samples in req.samples.items():
-            req.derive_stat[order] = mean(samples)
     if not all_orders:
         abort(404, "No data found.")
     # Now grab the baseline data.