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-rw-r--r--activerecord/lib/active_record/readonly_attributes.rb1
1 files changed, 0 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/readonly_attributes.rb b/activerecord/lib/active_record/readonly_attributes.rb
index 8bfffe89ba..1d8c566e40 100644
--- a/activerecord/lib/active_record/readonly_attributes.rb
+++ b/activerecord/lib/active_record/readonly_attributes.rb
@@ -1,4 +1,3 @@
-require 'active_support/core_ext/class/attribute'
module ActiveRecord
module ReadonlyAttributes