From 8ac1f107f43d42223c854c32a717046def1d92cb Mon Sep 17 00:00:00 2001
From: Ben Woosley <ben.woosley@gmail.com>
Date: Fri, 8 Jan 2016 12:13:54 -0800
Subject: [PATCH] Remove unnecessary `dup` in
 `ActiveModel::Serializer::Associations#associate`

The `_reflections` are duped on `inherited` - no need to `dup` them
with each addition.
---
 lib/active_model/serializer/associations.rb | 2 --
 1 file changed, 2 deletions(-)

diff --git a/lib/active_model/serializer/associations.rb b/lib/active_model/serializer/associations.rb
index c4da3515..42e872ce 100644
--- a/lib/active_model/serializer/associations.rb
+++ b/lib/active_model/serializer/associations.rb
@@ -76,8 +76,6 @@ module ActiveModel
         # @api private
         #
         def associate(reflection)
-          self._reflections = _reflections.dup
-
           self._reflections << reflection
         end
       end