diff --git a/simulators/calc_simulator.py b/simulators/calc_simulator.py
index 3075968ebc585392cb1b896146d165184793ecc9..0314e86d079d9ca3d934ab6a9b875204da215189 100644
--- a/simulators/calc_simulator.py
+++ b/simulators/calc_simulator.py
@@ -7,7 +7,6 @@
 # python_version  :3.8
 # mayavi version  :4.8.1
 # ==============================================================================
-from mayavi import mlab
 from simulators.simulator import Simulator
 from common.system import System
 from simulators.views.body_view import BodyView