Merge pull request #29595 from fatkodima/result_lambda_class_checking

Remove useless class checking for `ActiveSupport::Callbacks`s result_lambda

actionpack/lib/abstract_controller/callbacks.rb

@@ -29,7 +29,7 @@ module Callbacks
 
     included do
       define_callbacks :process_action,
-                       terminator: ->(controller, result_lambda) { result_lambda.call if result_lambda.is_a?(Proc); controller.performed? },
+                       terminator: ->(controller, result_lambda) { result_lambda.call; controller.performed? },
                        skip_after_callbacks_if_terminated: true
     end
 

activesupport/lib/active_support/callbacks.rb

@@ -596,7 +596,7 @@ def default_terminator
             Proc.new do |target, result_lambda|
               terminate = true
               catch(:abort) do
-                result_lambda.call if result_lambda.is_a?(Proc)
+                result_lambda.call
                 terminate = false
               end
               terminate