1 files changed, 2 insertions, 11 deletions
diff --git a/activerecord/lib/active_record/core.rb b/activerecord/lib/active_record/core.rb
index 803d68187c..0fddfdf0cb 100644
--- a/activerecord/lib/active_record/core.rb
+++ b/activerecord/lib/active_record/core.rb
@@ -1,7 +1,5 @@
-require 'active_support/concern'
 require 'active_support/core_ext/hash/indifferent_access'
 require 'active_support/core_ext/object/deep_dup'
-require 'active_support/core_ext/module/delegation'
 require 'thread'
 
 module ActiveRecord
@@ -84,15 +82,6 @@ module ActiveRecord
       # The connection handler
       config_attribute :connection_handler
 
-      ##
-      # :singleton-method:
-      # Specifies whether or not has_many or has_one association option
-      # :dependent => :restrict raises an exception. If set to true, the
-      # ActiveRecord::DeleteRestrictionError exception will be raised
-      # along with a DEPRECATION WARNING. If set to false, an error would
-      # be added to the model instead.
-      config_attribute :dependent_restrict_raises
-
       %w(logger configurations default_timezone schema_format timestamped_migrations).each do |name|
         config_attribute name, global: true
       end
@@ -266,6 +255,7 @@ module ActiveRecord
         @changed_attributes[attr] = orig_value if _field_changed?(attr, orig_value, @attributes[attr])
       end
 
+      @aggregation_cache = {}
       @association_cache = {}
       @attributes_cache  = {}
 
@@ -390,6 +380,7 @@ module ActiveRecord
 
       @attributes[pk] = nil unless @attributes.key?(pk)
 
+      @aggregation_cache       = {}
       @association_cache       = {}
       @attributes_cache        = {}
       @previously_changed      = {}