diff --git a/csst_ifs_sim/csst_ifs_sim.py b/csst_ifs_sim/csst_ifs_sim.py
index be3ddcdd94f6ad693d77c1a9d4cacf4991e9f34f..f9ddf3aff08ea92ae696191b82c7098c1ab34f17 100644
--- a/csst_ifs_sim/csst_ifs_sim.py
+++ b/csst_ifs_sim/csst_ifs_sim.py
@@ -124,12 +124,6 @@ from scipy.interpolate import interp1d
 import astropy.coordinates as coord
 import ctypes
 
-
-import IFSinstrumentModel
-import cosmicrays
-import logger as lg
-
-
 from support import IFSinstrumentModel
 from support import cosmicrays
 from support import logger as lg