Cleanup bookmarks and Reading List Items (#567)

* Removed directives, ensured we delete bookmarks and reading list items when chapters are deleted.

* Added parsing support for "Kimi no Koto ga Daidaidaidaidaisuki na 100-nin no Kanojo Chapter 11-10"

API/Interfaces/Repositories/IChapterRepository.cs

@@ -1,6 +1,5 @@
 using System.Collections.Generic;
 using System.Threading.Tasks;
-using API.DTOs;
 using API.Entities;
 
 namespace API.Interfaces.Repositories