diff --git a/api/s4_tanks.py b/api/s4_tanks.py
index 461fc75..059566c 100644
--- a/api/s4_tanks.py
+++ b/api/s4_tanks.py
@@ -1,7 +1,5 @@
 from psycopg.rows import Row
-from .connection import g_conn_dict as conn
 from .s0_base import *
-from .operation import *
 from .change_set import ChangeSet
 from .s24_coordinates import *
 import utility