diff --git a/src/black/mode.py b/src/black/mode.py
index 455ed36e27e..1dcaef3d8ec 100644
--- a/src/black/mode.py
+++ b/src/black/mode.py
@@ -127,7 +127,6 @@ class Preview(Enum):
     """Individual preview style features."""
 
     string_processing = auto()
-    hug_simple_powers = auto()
 
 
 class Deprecated(UserWarning):