# File lib/fog/aws/requests/auto_scaling/delete_notification_configuration.rb, line 39
        def delete_notification_configuration(auto_scaling_group_name, topic_arn)
          unless self.data[:notification_configurations].has_key?(auto_scaling_group_name)
            raise Fog::AWS::AutoScaling::ValidationError.new('AutoScalingGroup name not found - %s' % auto_scaling_group_name)
          end
          unless self.data[:notification_configurations][auto_scaling_group_name].has_key?(topic_arn)
            raise Fog::AWS::AutoScaling::ValidationError.new("Notification Topic '#{topic_arn}' doesn't exist for '#{self.data[:owner_id]}'")
          end

          self.data[:notification_configurations][auto_scaling_group_name].delete(topic_arn)
          if self.data[:notification_configurations][auto_scaling_group_name].empty?
            self.data[:notification_configurations].delete(auto_scaling_group_name)
          end

          response = Excon::Response.new
          response.status = 200
          response.body = {
            'ResponseMetadata' => { 'RequestId' => Fog::AWS::Mock.request_id }
          }
          response
        end