post_tags の論理削除と履歴管理を廃止 (#411) (#417)

Reviewed-on: #417
Co-authored-by: miteruzo <miteruzo@naver.com>

backend/app/representations/post_repr.rb

@@ -88,14 +88,14 @@ module PostRepr
 
   def tag_json post
     post
-        .active_post_tags
+        .post_tags
         .reject { _1.tag.deprecated? }
         .sort_by { _1.tag.name }
-        .map { |post_tag|
+        .map do |post_tag|
       TagRepr.inline(post_tag.tag).merge(
           'children' => [],
           'sections' => post_tag.sections.as_json(only: [:begin_ms, :end_ms]))
-    }
+    end
   end
 
   def thumbnail_url post, host: nil