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-rw-r--r--actionpack/lib/action_controller.rb1
1 files changed, 0 insertions, 1 deletions
diff --git a/actionpack/lib/action_controller.rb b/actionpack/lib/action_controller.rb
index c17d3f3fe2..7498f9624e 100644
--- a/actionpack/lib/action_controller.rb
+++ b/actionpack/lib/action_controller.rb
@@ -55,7 +55,6 @@ require 'action_view'
require 'action_controller/vendor/html-scanner'
# Common Active Support usage in Action Controller
-require 'active_support/concern'
require 'active_support/core_ext/class/attribute_accessors'
require 'active_support/core_ext/load_error'
require 'active_support/core_ext/module/attr_internal'