3 files changed, 9 insertions, 4 deletions
diff --git a/activerecord/lib/active_record/associations/association_collection.rb b/activerecord/lib/active_record/associations/association_collection.rb
index b2b3a9789c..1ceb0dbf96 100644
--- a/activerecord/lib/active_record/associations/association_collection.rb
+++ b/activerecord/lib/active_record/associations/association_collection.rb
@@ -485,7 +485,14 @@ module ActiveRecord
 
         def callback(method, record)
           callbacks_for(method).each do |callback|
-            ActiveSupport::DeprecatedCallbacks::Callback.new(method, callback, record).call(@owner, record)
+            case callback
+            when Symbol
+              @owner.send(callback, record)
+            when Proc
+              callback.call(@owner, record)
+            else
+              callback.send(method, @owner, record)
+            end
           end
         end
 
diff --git a/activerecord/lib/active_record/callbacks.rb b/activerecord/lib/active_record/callbacks.rb
index e1d772bd95..e2a8f03c8f 100644
--- a/activerecord/lib/active_record/callbacks.rb
+++ b/activerecord/lib/active_record/callbacks.rb
@@ -274,7 +274,7 @@ module ActiveRecord
 
     def deprecated_callback_method(symbol) #:nodoc:
       if respond_to?(symbol)
-        ActiveSupport::Deprecation.warn("Base##{symbol} has been deprecated, please use Base.#{symbol} :method instead")
+        ActiveSupport::Deprecation.warn("Overwriting #{symbol} in your models has been deprecated, please use Base##{symbol} :method_name instead")
         send(symbol)
       end
     end
diff --git a/activerecord/lib/active_record/validations.rb b/activerecord/lib/active_record/validations.rb
index e8a2a72735..12c1f23763 100644
--- a/activerecord/lib/active_record/validations.rb
+++ b/activerecord/lib/active_record/validations.rb
@@ -17,8 +17,6 @@ module ActiveRecord
 
   module Validations
     extend ActiveSupport::Concern
-
-    include ActiveSupport::DeprecatedCallbacks
     include ActiveModel::Validations
 
     included do