code cleaning

main.py

@@ -12,7 +12,6 @@ db = dataset.connect('mysql://choozmo:pAssw0rd@db.ptt.cx:3306/cmm_test?charset=u
 @app.get("/tags")
 async def get_tags():
     tag_dict = {}
-    a=1
     table = db.load_table('tag_table')
     statement = 'SELECT id,name FROM tag_table'
     for row in db.query(statement):