Remove unused class AttributeMethodCache

activerecord/lib/active_record/attribute_methods.rb

@@ -34,30 +34,6 @@ module ActiveRecord
 
     BLACKLISTED_CLASS_METHODS = %w(private public protected allocate new name parent superclass)
 
-    class AttributeMethodCache
-      def initialize
-        @module = Module.new
-        @method_cache = Concurrent::Map.new
-      end
-
-      def [](name)
-        @method_cache.compute_if_absent(name) do
-          safe_name = name.unpack('h*'.freeze).first
-          temp_method = "__temp__#{safe_name}"
-          ActiveRecord::AttributeMethods::AttrNames.set_name_cache safe_name, name
-          @module.module_eval method_body(temp_method, safe_name), __FILE__, __LINE__
-          @module.instance_method temp_method
-        end
-      end
-
-      private
-
-      # Override this method in the subclasses for method body.
-      def method_body(method_name, const_name)
-        raise NotImplementedError, "Subclasses must implement a method_body(method_name, const_name) method."
-      end
-    end
-
     class GeneratedAttributeMethods < Module; end # :nodoc:
 
     module ClassMethods

activerecord/lib/active_record/attribute_methods/read.rb

@@ -1,7 +1,6 @@
 module ActiveRecord
   module AttributeMethods
     module Read
-
       extend ActiveSupport::Concern
 
       module ClassMethods