code: private void eliminateCallTargetArgAt(Node ref, int argIndex) {
      Node callArgNode = ReferenceMap.getArgumentForCallOrNewOrDotCall(ref, argIndex);
      if (callArgNode != null) {
        NodeUtil.deleteNode(callArgNode, compiler);
      }
    }
docs: Eliminates the parameter from a function call.
  @param definitionFinder The definition and use sites index.
  @param p
  @param call The function call node
  @param argIndex The index of the argument to remove.