[Frontend] Require flag for loading text and image embeds (#27204)

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>
Co-authored-by: DarkLight1337 <tlleungac@connect.ust.hk>

tests/v1/entrypoints/openai/test_completion.py

@@ -6,7 +6,6 @@ import openai  # use the official client for correctness check
 import pytest
 import pytest_asyncio
 import regex as re
-import requests
 from openai import BadRequestError
 
 from tests.utils import RemoteOpenAIServer
@@ -686,17 +685,3 @@ async def test_invalid_grammar(client: openai.AsyncOpenAI, model_name: str):
                 "structured_outputs": {"grammar": invalid_simplified_sql_grammar}
             },
         )
-
-
-@pytest.mark.asyncio
-async def test_completion_with_empty_prompt_embeds(client: openai.AsyncOpenAI) -> None:
-    """Test completion with empty prompt embeds."""
-    payload: dict[str, object] = {"prompt": "Hello", "prompt_embeds": []}
-    headers: dict[str, str] = {"Content-Type": "application/json"}
-    # base_url = http://localhost:8000/v1/completions
-    response = requests.post(
-        f"{client.base_url}completions", headers=headers, json=payload
-    )
-    assert response.status_code == 200, (
-        f"Expected status code 200, got {response.status_code}. "
-    )