1 files changed, 0 insertions, 4 deletions
diff --git a/activerecord/lib/active_record/associations/collection_proxy.rb b/activerecord/lib/active_record/associations/collection_proxy.rb
index d35fe9fe50..55bf2e0ff0 100644
--- a/activerecord/lib/active_record/associations/collection_proxy.rb
+++ b/activerecord/lib/active_record/associations/collection_proxy.rb
@@ -33,10 +33,6 @@ module ActiveRecord
         super klass, klass.arel_table, klass.predicate_builder
       end
 
-      def initialize_dup(other) # :nodoc:
-        @association = @association.deep_dup
-      end
-
       def target
         @association.target
       end