🔥 Remove Python 3.9 specific files, no longer needed after updating translations (#14931)

docs_src/conditional_openapi/tutorial001_py39.py

@@ -1,16 +0,0 @@
-from fastapi import FastAPI
-from pydantic_settings import BaseSettings
-
-
-class Settings(BaseSettings):
-    openapi_url: str = "/openapi.json"
-
-
-settings = Settings()
-
-app = FastAPI(openapi_url=settings.openapi_url)
-
-
-@app.get("/")
-def root():
-    return {"message": "Hello World"}