diff --git a/invesalius/data/viewer_slice.py b/invesalius/data/viewer_slice.py
index 50dfbc2..7836ef3 100755
--- a/invesalius/data/viewer_slice.py
+++ b/invesalius/data/viewer_slice.py
@@ -33,7 +33,6 @@ import constants as const
 import cursor_actors as ca
 import data.slice_ as sl
 import data.vtk_utils as vtku
-import mode as md
 import project
 import slice_data as sd
 
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libgit2 0.21.2