diff --git a/activesupport/lib/active_support/callbacks.rb b/activesupport/lib/active_support/callbacks.rb
index ea71569ca8d69eeccef9d36da0dfe9da27c11472..d771cab68bf9f5d0baa00cdc6744d0838d982962 100644
--- a/activesupport/lib/active_support/callbacks.rb
+++ b/activesupport/lib/active_support/callbacks.rb
@@ -512,7 +512,6 @@ def invoke_after(arg)
         end
       end
 
-      # An Array with a compile method.
       class CallbackChain #:nodoc:#
         include Enumerable