diff --git a/src/black/lines.py b/src/black/lines.py
index d0a7e6d..4ff11bd 100644
--- a/src/black/lines.py
+++ b/src/black/lines.py
@@ -14,7 +14,7 @@
 )
 
 from black.brackets import DOT_PRIORITY, BracketTracker
-from black.mode import Mode, Preview
+from black.mode import Mode
 from black.nodes import (
     BRACKETS,
     CLOSING_BRACKETS,