diff --git a/src/main/scala/org/geneontology/rules/engine/ReteNodes.scala b/src/main/scala/org/geneontology/rules/engine/ReteNodes.scala
index 5e242f0..6344c0e 100644
--- a/src/main/scala/org/geneontology/rules/engine/ReteNodes.scala
+++ b/src/main/scala/org/geneontology/rules/engine/ReteNodes.scala
@@ -137,8 +137,6 @@ final class JoinNode(val leftParent: BetaNode with BetaParent, rightParent: Alph
         _ = tokensToSend = newToken :: tokensToSend
         (bindingVar, bindingValue) <- newToken.bindings
       } {
-        //betaMem.tokenIndex.getOrElseUpdate(binding, mutable.Set.empty).add(newToken)
-        //betaMem.tokenIndex.getOrElseUpdate(bindingVar, mutable.AnyRefMap.empty).getOrElseUpdate(bindingValue, mutable.Set.empty).add(newToken)
         val currentMap = betaMem.tokenIndex.getOrElseUpdate(bindingVar, mutable.AnyRefMap.empty)
         val currentList = currentMap.getOrElse(bindingValue, Nil)
         currentMap(bindingValue) = newToken :: currentList