Removed unnecessary import author_publisher

Author: writeson

python-sqlite-sqlalchemy/project/examples/example_2/main.py

@@ -9,7 +9,7 @@
 from sqlalchemy.sql import asc, desc, func
 from treelib import Tree
 
-from project.modules.models import Author, Book, Publisher, author_publisher
+from project.modules.models import Author, Book, Publisher
 
 
 def get_books_by_publishers(session, ascending=True):