CI: use 'sglang serve' in CI tests (#18597)

Co-authored-by: Mick <mickjagger19@icloud.com>
Co-authored-by: sglang-bot <sglangbot@gmail.com>

python/sglang/multimodal_gen/utils.py

@@ -11,7 +11,6 @@ import inspect
 import math
 import os
 import signal
-import socket
 import sys
 import threading
 import traceback
@@ -23,7 +22,6 @@ from typing import Any, TypeVar, cast
 import cloudpickle
 import torch
 import yaml
-from remote_pdb import RemotePdb
 from torch.distributed.fsdp import MixedPrecisionPolicy
 
 import sglang.multimodal_gen.envs as envs
@@ -546,15 +544,6 @@ class TypeBasedDispatcher:
         raise ValueError(f"Invalid object: {obj}")
 
 
-# For non-torch.distributed debugging
-def remote_breakpoint() -> None:
-    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
-        s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-        s.bind(("localhost", 0))  # Let the OS pick an ephemeral port.
-        port = s.getsockname()[1]
-        RemotePdb(host="localhost", port=port).set_trace()
-
-
 @dataclass
 class MixedPrecisionState:
     param_dtype: torch.dtype | None = None