Remove code examples for Python 3.8 in `using_request_directly`

docs/en/docs/advanced/using-request-directly.md

@@ -29,7 +29,7 @@ Let's imagine you want to get the client's IP address/host inside of your *path
 
 For that you need to access the request directly.
 
-{* ../../docs_src/using_request_directly/tutorial001.py hl[1,7:8] *}
+{* ../../docs_src/using_request_directly/tutorial001_py39.py hl[1,7:8] *}
 
 By declaring a *path operation function* parameter with the type being the `Request` **FastAPI** will know to pass the `Request` in that parameter.
 

tests/test_tutorial/test_using_request_directly/test_tutorial001.py

@@ -1,6 +1,6 @@
 from fastapi.testclient import TestClient
 
-from docs_src.using_request_directly.tutorial001 import app
+from docs_src.using_request_directly.tutorial001_py39 import app
 
 client = TestClient(app)