1 files changed, 0 insertions, 10 deletions
diff --git a/activesupport/lib/active_support/callbacks.rb b/activesupport/lib/active_support/callbacks.rb
index 1a830c03b8..296de94e91 100644
--- a/activesupport/lib/active_support/callbacks.rb
+++ b/activesupport/lib/active_support/callbacks.rb
@@ -341,27 +341,17 @@ module ActiveSupport
         @key     = compute_identifier filter
         @if      = Array(options[:if])
         @unless  = Array(options[:unless])
-
-        deprecate_per_key_option(options)
       end
 
       def filter; @key; end
       def raw_filter; @filter; end
 
-      def deprecate_per_key_option(options)
-        if options[:per_key]
-          raise NotImplementedError, ":per_key option is no longer supported. Use generic :if and :unless options instead."
-        end
-      end
-
       def merge(chain, new_options)
         _options = {
           :if     => @if.dup,
           :unless => @unless.dup
         }
 
-        deprecate_per_key_option new_options
-
         _options[:if].concat     Array(new_options.fetch(:unless, []))
         _options[:unless].concat Array(new_options.fetch(:if, []))