diff --git a/app/models/concerns/fluentd/setting/section_validator.rb b/app/models/concerns/fluentd/setting/section_validator.rb
deleted file mode 100644
index 5f4df18..0000000
--- a/app/models/concerns/fluentd/setting/section_validator.rb
+++ /dev/null
@@ -1,22 +0,0 @@
-class Fluentd
-  module Setting
-    module SectionValidator
-      extend ActiveSupport::Concern
-
-      included do
-        validate :validate_sections
-      end
-
-      def validate_sections
-        self._section_params.each do |name, sections|
-          sections.each do |section|
-            next if section.attributes.values.all?(&:blank?)
-            if section.invalid?
-              errors.add(name, :invalid, message: section.errors.full_messages)
-            end
-          end
-        end
-      end
-    end
-  end
-end