--- trunk/gadget/popinfo.cc	2014/02/10 17:09:07	1
+++ trunk/gadget/popinfo.cc	2015/04/29 12:55:30	2
@@ -7,22 +7,6 @@
   return *this;
 }
 
-PopInfo& PopInfo::operator += (const PopInfo& a) {
-  if (isZero(N + a.N)) {
-    W = 0.0;
-    N = 0.0;
-  } else if (isZero(a.N)) {
-    //adding a zero popinfo, so don't do anything
-  } else if (isZero(N)) {
-    W = a.W;
-    N = a.N;
-  } else {
-    W = (N * W + a.N * a.W) / (N + a.N);
-    N = N + a.N;
-  }
-  return *this;
-}
-
 PopInfo PopInfo::operator * (double a) {
   PopInfo c;
   c.N = N * a;