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

docs_src/extra_models/tutorial004_py39.py

@@ -1,20 +0,0 @@
-from fastapi import FastAPI
-from pydantic import BaseModel
-
-app = FastAPI()
-
-
-class Item(BaseModel):
-    name: str
-    description: str
-
-
-items = [
-    {"name": "Foo", "description": "There comes my hero"},
-    {"name": "Red", "description": "It's my aeroplane"},
-]
-
-
-@app.get("/items/", response_model=list[Item])
-async def read_items():
-    return items

docs_src/extra_models/tutorial005_py39.py

@@ -1,8 +0,0 @@
-from fastapi import FastAPI
-
-app = FastAPI()
-
-
-@app.get("/keyword-weights/", response_model=dict[str, float])
-async def read_keyword_weights():
-    return {"foo": 2.3, "bar": 3.4}