📝 Simplify example for docs for Additional Responses, remove unnecessary else (#4693)

docs/en/docs/advanced/additional-responses.md

@@ -23,7 +23,7 @@ Each of those response `dict`s can have a key `model`, containing a Pydantic mod
 
 For example, to declare another response with a status code `404` and a Pydantic model `Message`, you can write:
 
-```Python hl_lines="18  23"
+```Python hl_lines="18  22"
 {!../../../docs_src/additional_responses/tutorial001.py!}
 ```
 

docs_src/additional_responses/tutorial001.py

@@ -19,5 +19,4 @@ app = FastAPI()
 async def read_item(item_id: str):
     if item_id == "foo":
         return {"id": "foo", "value": "there goes my hero"}
-    else:
-        return JSONResponse(status_code=404, content={"message": "Item not found"})
+    return JSONResponse(status_code=404, content={"message": "Item not found"})