[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

jupyter_server/services/contents/manager.py

@@ -875,7 +875,7 @@ async def rename_file(self, old_path, new_path):
 
     async def resolve_path(self, path: str):
         """Resolve path relative to root resource."""
-        return None
+        return
 
     async def delete(self, path):
         """Delete a file/directory and any associated checkpoints."""