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-rw-r--r--activemodel/lib/active_model/attributes.rb1
1 files changed, 0 insertions, 1 deletions
diff --git a/activemodel/lib/active_model/attributes.rb b/activemodel/lib/active_model/attributes.rb
index cac461b549..28dd24b3cd 100644
--- a/activemodel/lib/active_model/attributes.rb
+++ b/activemodel/lib/active_model/attributes.rb
@@ -1,6 +1,5 @@
# frozen_string_literal: true
-require "active_support/core_ext/object/deep_dup"
require "active_model/attribute_set"
require "active_model/attribute/user_provided_default"