diff --git a/fastapi/routing.py b/fastapi/routing.py
index 7a7f6588a..a7b47de56 100644
--- a/fastapi/routing.py
+++ b/fastapi/routing.py
@@ -51,7 +51,6 @@ from fastapi.encoders import jsonable_encoder
 from fastapi.exceptions import (
     EndpointContext,
     FastAPIError,
-    PydanticV1NotSupportedError,
     RequestMalformedError,
     RequestValidationError,
     ResponseValidationError,