diff --git a/bookstore/src/main/java/com/hexagonal/repository/BookRepository.java b/bookstore/src/main/java/com/hexagonal/repository/BookRepository.java
deleted file mode 100644
index 1e64a2d21b..0000000000
--- a/bookstore/src/main/java/com/hexagonal/repository/BookRepository.java
+++ /dev/null
@@ -1,15 +0,0 @@
-package com.hexagonal.repository;
-
-import java.util.List;
-
-import com.hexagonal.domain.Book;
-
-public interface BookRepository {
-
-    public void add(Book book);
-
-    public Book buy(String isbn);
-
-    public List<Book> list();
-
-}