diff --git a/pandas/core/generic.py b/pandas/core/generic.py
index cf60717011222..9777ced2b209d 100644
--- a/pandas/core/generic.py
+++ b/pandas/core/generic.py
@@ -12340,9 +12340,6 @@ def last_valid_index(self) -> Hashable | None:
     Axis for the function to be applied on.
     For `Series` this parameter is unused and defaults to 0.
 
-    For DataFrames, specifying ``axis=None`` will apply the aggregation
-    across both axes.
-
     .. versionadded:: 2.0.0
 
 skipna : bool, default True