Issue 26977, remove unneeded line in pvariance (duplicate call to _ss).

Steven D'Aprano · Steven D'Aprano · commit cc22984d9e5e · 2016-05-08T22:14:38.000+10:00
diff --git a/Lib/statistics.py b/Lib/statistics.py
@@ -593,7 +593,6 @@ def pvariance(data, mu=None):
     n = len(data)
     if n < 1:
         raise StatisticsError('pvariance requires at least one data point')
-    ss = _ss(data, mu)
     T, ss = _ss(data, mu)
     return _convert(ss/n, T)
 
