diff --git a/docs/source/metrics.rst b/docs/source/metrics.rst
index 25e954d6332c8..6cc5a9387a8ef 100644
--- a/docs/source/metrics.rst
+++ b/docs/source/metrics.rst
@@ -446,13 +446,6 @@ to_onehot [func]
     :noindex:
 
 
-to_categorical [func]
-~~~~~~~~~~~~~~~~~~~~~
-
-.. autofunction:: pytorch_lightning.metrics.utils.to_categorical
-    :noindex:
-
-
 Regression
 ----------