[V1] Prompt logprobs + APC compatibility; prompt logprobs reqs cannot fill APC (#13949)

tests/v1/engine/test_async_llm.py

@@ -6,7 +6,6 @@ from typing import Optional
 
 import pytest
 
-from tests.v1.engine.utils import PLP_APC_UNSUPPORTED_MSG
 from vllm import SamplingParams
 from vllm.assets.image import ImageAsset
 from vllm.engine.arg_utils import AsyncEngineArgs
@@ -72,41 +71,6 @@ async def generate(engine: AsyncLLM,
     return count, request_id
 
 
-@pytest.mark.parametrize(
-    "output_kind", [RequestOutputKind.DELTA, RequestOutputKind.FINAL_ONLY])
-@pytest.mark.asyncio
-async def test_async_llm_refuses_prompt_logprobs_with_apc(
-        monkeypatch, output_kind: RequestOutputKind):
-    """Test passes if AsyncLLM raises an exception when it is configured
-    for automatic prefix caching and it receives a request with
-    prompt_logprobs enabled, which is incompatible."""
-    # TODO(rickyx): Remove monkeypatch VLLM_USE_V1 setting once we have a
-    # better way to test V1 so that in the future when we switch, we don't
-    # have to change all the tests.
-    monkeypatch.setenv("VLLM_USE_V1", "1")
-    # Create AsyncLLM engine with APC
-    apc_engine_args = AsyncEngineArgs(model="facebook/opt-125m",
-                                      enable_prefix_caching=True,
-                                      gpu_memory_utilization=0.8,
-                                      disable_log_requests=True)
-    engine = AsyncLLM.from_engine_args(apc_engine_args)
-    try:
-        with pytest.raises(ValueError) as excinfo:
-            # Issue a request with prompt logprobs enabled, which should fail
-            await asyncio.create_task(
-                generate(engine,
-                         "request-0",
-                         TEXT_PROMPT,
-                         output_kind,
-                         10,
-                         prompt_logprobs=5))
-        # Validate exception string is correct
-        assert str(excinfo.value) == PLP_APC_UNSUPPORTED_MSG
-    finally:
-        # Shut down engine
-        engine.shutdown()
-
-
 @pytest.mark.parametrize(
     "output_kind", [RequestOutputKind.DELTA, RequestOutputKind.FINAL_ONLY])
 @pytest.mark.parametrize("engine_args_and_prompt",