Unskip test for invalid logprobs handling

Remove skip marker from test for invalid logprobs.

Signed-off-by: Gao Han <hgaoaf@connect.ust.hk>

tests/core/sched/test_omni_ar_scheduler_logprobs.py

@@ -105,7 +105,6 @@ class _RequestQueue(list):
                 self.remove(request)
 
 
-@pytest.mark.skip(reason="#issue 5484")
 def test_invalid_logprobs_finish_only_the_affected_scheduler_request() -> None:
     """A bad runner response must not bring down unrelated batch requests."""
     bad = _Request("bad")